Spu 7 electrical circuit diagram and connections. Section two - I. E. Bondarchuk, V. I. Kharin. Bundle and placement
The intercom SPU-7 is intended: for intra-helicopter communication using the AG-2 headset, GSSh-A-18 or a headset between all crew members; for pilots to access external radio communication through two radio stations and two radio compasses; for listening to special-purpose signals from the equipment for voice messages RI-65B; to listen to the tone sound signal "DANGEROUS" height from the radio altimeter, regardless of the position of the radio switches on the subscriber units; for recording on the wire sound carrier of the MS-61 tape recorder information and commands received via the radio communication lines and the internal on-board telephone communication of the helicopter through the subscriber unit of the helicopter commander.
PLACING THE SPEECHING DEVICE ON THE HELICOPTER:
The low-frequency amplifier is installed on a shelf behind the co-pilot's seat on a 5N frame;
Subscriber sets of pilots to the left and right of the gas station panels on the ceiling of the cockpit;
Operator's station with "ON - LARING - OFF" switch on the left side of the cargo compartment between ShP 6 and 7;
trigger button "SPU-1 - RADIO-2" is installed on each handle of the cyclic step.
On a helicopter, the intercom SPU-7 works with two voice points:
One communication point is installed in the cockpit door opening in a special niche on the right, designed for communication by a flight mechanic. It has a remote button "SPU" on the bracket of the right shelf and a switch "LISTENING ARK-U2 - ARK-9" located in the same place;
The second additional call point is installed in the cargo compartment on the wall of SHP No. 1 near the sliding door.
For the convenience of the flight mechanic (operator) with the SPU, working with an onboard or external suspension, the helicopter has three extension cords with 4-pin female half-connectors - in the cockpit on the right side of the doorway and in the cargo compartment on the wall of frame No. 1.
The co-pilot can conduct intra-helicopter communication continuously (without pressing the "SPU-RADIO" trigger button on the control stick) by setting the "LARINGIT" switch on the right side panel of the electric console to the "ON" position.
MAIN TECHNICAL CHARACTERISTICS.
The intercom is connected to the battery bus through the GK-2 "SPU-7" gas station circuit breaker, on the right panel
Pilots electric control gas station.
Supply voltage…………………………..... (27±2.7)V.
Power consumption…………………………50W.
Supply voltage for laryngophones or
headset amplifiers .............................................. 3-5V.
The gain is controlled by a variable resistance on the low frequency amplifier and
can reach…………………………………100 times.
Frequency range……………………………..300...3500Hz.
BRIEF DESCRIPTION OF THE SET.
The main elements of the intercom are subscriber units. They are used to connect microphones and headphones to various means of communication, as well as to switch power circuits for starting relays of radio transmitters.
The functional diagram of the intercom is shown in fig. 3., shows the relationship of individual cascades and nodes, communication with other interfaced radio equipment. In the functional diagram, individual blocks and cascades are indicated by rectangles, each of which has an input and output, shown by arrows. The switching equipment of the intercom is located in the RKSPU junction box.
The intercom is controlled using handles and switches installed on the SPU-7 subscriber unit and SPU-RADIO sequential switching buttons of type 2KPP, when the trigger is pressed, until the first stage is triggered, it works in the intra-helicopter communication mode, and when pressed until it is triggered the second stage - work in the "RADIO" mode (external communication). A low frequency amplifier (ULF) is only needed to provide intra-helicopter communications.
Fig.1 General view of the subscriber unit SPU-7.
1 – listening volume control; 2 - general volume control; 3 - switch of internal and external radio communications; 4 – radio station switch; 5 – circular call button; 6 low-frequency amplifier switch (not used on the helicopter).
The radio switch (r/st) connects the headsets to various radios. The switch has 6 positions;
UKR - command r / st "BAKLAN-20"
SR - associated r / st "YADRO-1A"
KR - not involved;
DR - not involved;
RK-1 - radio compass ARK-9;
RK-2 - radio complex ARK-U2 with R-852.
The helicopter uses one low-frequency amplifier, so the "NETWORK" switches on the subscriber units are not used.
The "CV" button is used to transmit information to all crew members at an increased volume.
Smooth control of the volume of speech transmitted over internal or external communication networks is carried out by the "GENERAL" volume control, and the level of listening to signals from the internal communication network when working via the internal communication and signals from the internal communication network when working via the external communication network - using the "CLEAR" volume control. Therefore, the "Listening" knob cannot be set to the left extreme position, since in this case the signal is not heard.
Fig.2 General view of the call point.
The operation of the "CALL" button on the call point is similar to the operation of the "CV" button on the subscriber unit.
Additional points of the flight mechanic (operator) allow only intra-helicopter communication, access to radio communication from additional voice points is not provided.
From the operator's subscriber unit on the left side of the cockpit, not only intra-helicopter communications are possible, but also listening to radio traffic through the BAKLAN-20 command radio station (pos. UKR.).
The sound signal "DANGEROUS ALTITUDE" from the radio altimeter goes to the head phones of all crew members, regardless of the position of the switches on the subscriber units.
Voice messages about emergencies, as well as recording audio information on a tape recorder, are carried out through the subscriber unit of the helicopter commander (left pilot).
OPERATING LIMITATIONS.
Turn on before starting the engines, keep the SPU-7 power on during the entire flight; turn off after landing and a complete stop of the engines.
NORMAL OPERATION
SPU-7 DEVICES.
Before starting the engines, turn on the batteries, connect the headsets to the subscriber sets and call points.
1. Turn on the gas station "SPU-7" on the right panel of the gas station.
2. Set the NETWORK switch on the subscriber's set to the NETWORK-1 (or NETWORK-2) position.
3. To call the crew members, press the "SGGU-1" or "CV" button for the pilots, the "SPU" or "CALL" button for the flight mechanic - to transmit messages, releasing the buttons to listen to the answer. If the STC-RADIO switch on the subscriber units is set to the "STC" position, then during intercom, the aircraft commander and the co-pilot can simultaneously listen at a reduced volume to the radio reception of the radio station on which their radio switches are installed. The volume of the reception is controlled by the "LISTEN" knob, and the volume of the intra-helicopter communication is adjusted by the "GENERAL" knob.
4. To conduct radio communications, set the "SPU-RADIO" switch to the "RADIO" position; having selected the desired radio station with the radio station switch to transmit the message, press the trigger button to the second stop "RADIO-2", releasing the button, listen to the answer, adjusting its volume with the "GENERAL" knob.
NOTE: When the internal and external radio switch is set to pos. "SPU" it is impossible to turn on the transmitters of radio stations by pressing the "RADIO" button. At the same time, the operation of the "RADIO" button is similar to the operation of the "SPU" button.
WORK OF THE ON-BOARD MECHANIC (OPERATOR) WITH SPU-7.
1. To listen to the signals received by the radio compasses, the flight mechanic must set the "LISTEN. ARK-9 - ARK-U2" switch to the "ARK-9" or "ARK-U2" position. In this case, to call the flight mechanic, the pilots press the "CV" button on their subscriber unit, and the flight mechanic must set the "LISTEN" switch to answer. In the neutral position and press the "SPU" button, or leaving the "LISTEN" switch. In the position of the listened radio compass, press the "CALL" button on the call point. Adjust the volume of received messages with the "LOUDER" knob on the call point.
2. When transmitting long messages (working with a winch, with an external suspension, etc.), it is necessary to turn on "LARING" at an additional voice call.
The co-pilot can use the "LARING" switch on the right side panel of the electric console. In the "ON" position, intercom communication can be carried out without pressing the "SPU-RADIO" button on the control knob.
POSSIBLE FAULTS OF SPU-7, THEIR SIGNS AND
CREW ACTION.
The work of the SPU-7 before the flight and in flight is determined by clear listening and transmission over external and internal communication networks, precise operation of buttons, switches, volume controls.
SIGN: There is no internal and external communication. NECESSARY ACTIONS:
Check the inclusion of a DC source;
Check the inclusion of the gas stations "SPU-7", "COMMAND. RS", "COMMUNICATION RS";
Check the position of the "SPU-LARING" switch on the control panel of the MS-61 tape recorder, set pos. "SPU";
Set the switch "LISTENING. ARK-9 - ARK-U2" to the neutral position;
Check and if defective, replace the headset.
Subscriber headset provides intra-aircraft telephone communication via SPU-7, as well as external radiotelephone communication through radio stations installed on the aircraft.
The subscriber headset AG-2 includes a microphone DEMSh-1A with a microphone amplifier and a set of two telephones of the TA-56M type.
The microphone amplifier is assembled on semiconductor triodes and amplifies the audio frequency voltage generated by the microphone. The amplifier is powered by the radio equipment through which the communication is carried out.
The headset is connected to the SPU subscriber unit by means of a cord (electrical wires) and a four-pin semi-connector.
Purpose, composition and principle of operation of SPU-7. Aircraft intercom SPU-7 is designed to conduct intra-aircraft telephone communication between crew members and connect their headsets to radio stations installed on the aircraft.
With the help of SPU-7 crew members can carry out:
two-way telephone communication;
launch of radio stations and two-way communication through these stations; listening to radio compasses;
listening to the sound signal of reaching the specified descent height, received by the phones from the radio altimeter at any position of the SPU controls;
listening with reduced volume of external communication when working on internal communication;
listening with reduced internal communication volume when working on external communication;
smooth volume control in phones via internal and external communication networks;
communication using a remote cable when servicing an aircraft on the ground with a subscriber outside the aircraft.
On the plane, the SPU-7 includes: one or two amplifiers; three or four subscriber sets;
buttons "Radio" and buttons "SPU" - one with each subscriber unit;
two connecting blocks.
The SPU amplifier serves to amplify the voltage of low (audio) frequencies coming from the microphone amplifiers of the headsets when the subscribers transmit over the intra-aircraft communication network. It is assembled on semiconductor triodes. One or two amplifiers are installed on the radio equipment rack near frame No. 7. The following controls and adjustments are located on the SPU-7 subscriber unit (Fig. 25):
two-position switch "SPU - Radio" for connecting the subscriber's headset to the internal or external communication network;
a radio communication switch (galette) for six positions for connecting the subscriber's headset to radio stations and radio compasses installed on the aircraft;
rheostat handle “General for adjusting the volume of listening to communication, on which the “SPU - Radio” switch is installed;
rheostat handle "Proel." to adjust the volume of listening to a connection on which the “SPU-Radio” switch is not installed, i.e., a connection listened to at a reduced volume;
button "CV" ("Circular call"), which provides for the intercom network to conduct a transmission that is listened to by all subscribers with full volume;
switch "Network 1-2", the position of which on the aircraft does not matter.
When the "SPU - Radio" switch is in the "SPU" position, the subscriber's phones are connected to the output of the SPU amplifier, so the communication via the intra-aircraft network is listened to by the subscriber with an increased volume, adjusted using the "General" knob. At the same time, the subscriber's phones are connected through the transformer of the subscriber's set to the output of the receiver, on which the radio switch is installed, as a result of which this receiver is listened to in the phones with a reduced volume, which is adjusted using the "Listening" knob. The subscriber cannot turn on the station transmitter, i.e., broadcast.
When the switch "SPU - Radio" is set to the "Radio" position, the subscriber's phones are connected to the output of the receiver, on which the radio switch is installed, and through the transformer to the output of the SPU amplifier. As a result, the telephones listen to the receiver at full volume, and the communication of the internal network - at a reduced volume (provided that the transmission over the internal network is not carried out using the "CV" button). The volume of the receiver and intercom signals is adjusted respectively by the "General" and "Listening" knobs. At the same time, the circuits for switching on the corresponding transmitter and connecting the subscriber's microphone to it using the "Radio" button are prepared.
When the "CV" button is pressed, the subscriber's microphone is connected to the input of the SPU amplifier, and the phones of all subscribers - to the output of this amplifier and simultaneously through transformers - to the receivers on which the radio switches of the subscriber units are installed. All subscribers listen to the intranet broadcast at full volume and cannot broadcast. Thus, when at least one subscriber presses the "CV" button, then for all subscribers this is equivalent to the fact that the "SPU - Radio" switches of their subscriber units are set to the "SPU" position.
Subscriber sets are placed one by one on the vertical panels of the left and right consoles and on the radio operator's dashboard. If there are four devices on the aircraft, one of them is installed at the navigator's workplace.
The "Radio" button is designed to turn on the transmitter, on which the radio communication switch of the subscriber unit is installed, and connect the subscriber's microphone to this transmitter, provided that the "SPU - Radio" switch of the subscriber unit is set to the "Radio" position. When this switch is in the “STC” position, when the button is pressed, the microphone is connected to the STC amplifier, i.e., using the button, you can transmit via the intra-aircraft communication network. This transmission will be listened to by subscribers conducting radio communications with reduced volume.
The SPU button is designed to quickly connect the subscriber's headset to the intra-aircraft communication network. When it is pressed, the same connections occur as when the "Radio" button is pressed, when the "SPU - Radio" switch is in the "SPU" position, but regardless of the position of this switch. Thus, transmission over the intra-aircraft communication network can be carried out using the "SPU", "CV" or "Radio" buttons. In the latter case, you must first set the "SPU - Radio" switch to the "SPU" position.
To conduct radio communication, it is necessary to set the “SPU - Radio” switch to the “Radio” position and transmit using the “Radio” button. The "Radio" buttons are installed one by one on the helms and in the foot tangents under the radio operator's and navigator's tables, and the "SPU" buttons are installed one by one on the helms, on the radio operator's dashboard and near the navigator's SPU subscriber unit.
The connecting blocks are used for electrical connection of amplifiers and SPU subscriber sets, as well as for connecting SPU-7 to radio devices installed on the aircraft. They are located on the ceiling of the cockpit on the left, at frame No. 7.
To connect an external cable when communicating on the ground with a subscriber who is outside the aircraft, a four-pin half-connector is installed in the hatch on the starboard side of the aircraft between frames No. 1 and 2.
In order to provide communication via STC when servicing equipment located in the tail unpressurized compartment, a four-pin half-connector is installed in this compartment on the radio equipment rack, designed to connect a subscriber headset.
SPU-7 is powered by direct current from the emergency bus of the radio operator's dashboard. The power circuits are protected by two gas station-2 "SPU", which are located on this dashboard, and on the aircraft of the latest releases - on the upper shield of the pilots. SPU-7 consumes a current of about 0.6 A.
Switching on, pre-flight check, use of SPU-7. The SPU-7 aircraft intercom must be turned on before starting the engines and turned off only after the flight. To turn it on, you need to turn on the AZR-6 "Emergency tire of the radio operator's dashboard" and the AZS-2 "SPU".
To check the operability of the SPU-7, the "SPU - Radio" switch on the subscriber unit should be set to the "Radio" position and, using the "SPU" button, establish communication with another subscriber. Then you need to make sure that the volume of this connection is smoothly adjusted by the "Listening" knob. After that, you should establish a two-way connection using the "CV" button and make sure that the signals of this connection are heard at an increased volume, which is adjusted using the "General" knob. During the test of intra-aircraft communication, the radio switch must be in a position that corresponds to the included radio. The signals of this receiver must be heard at the appropriate volume in telephones.
Checking the access to external radio communication through the SPU-7 and the radio devices installed on the aircraft is carried out simultaneously with the pre-flight check of these devices.
The positions of the radio communication switch on the SPU-7 subscriber unit correspond to the following aircraft radio devices:
"UKR" - VHF radio station No. 1;
"SR" - medium wave radio station;
"KR" - shortwave radio station;
"DR" - VHF radio station No. 2; .
"RK-1" - radio compass No. 1;
"RK-2" - radio compass number 2.
By setting the "SPU-Radio" switch on the subscriber unit to the "Radio" position, you should check the inclusion of transmitting and listening to receiving devices.
With the help of the “General” knob located on the STC subscriber unit, the volume of communication signals heard in phones at full volume is mainly regulated. But the level of signals heard in phones with reduced volume also depends on its position. In this regard, before the flight, you must first set the required communication volume with the “General” knob, to which the “SPU - Radio” switch is set, and then use the “Listening” knob to adjust the level of communication signals listened to at a reduced volume.
Before the flight and during the flight, the “Listening” knob should not be turned to the extreme position counterclockwise, since in this position, low-volume communication signals in telephones may not be heard at all. In the future, this will lead to the fact that, if necessary, establish intra-aircraft communication with. such a subscriber will need to call it using the "CV" button, and other subscribers will not be able to transmit over the external radio network at this time.
Subscribers who conduct radio communications in flight are recommended to set the “SPU - Radio” switch to the “Radio” position for the entire flight time, and conduct intra-aircraft communications using the “SPU” button. If the subscriber called for communication using the "SPU" button does not answer, you need to press the "CV" button and call him.
The subscriber who received a circular call should increase the volume on the phones with the “Listening” knob or set the “SPU - Radio” switch to the “SPU” position, after which he will listen with sufficient volume to the transmission conducted by other subscribers via the intra-aircraft network using the “SPU ".
The SPU-7 intercom is designed for intra-aircraft telephone communication between crew members and for access to external radio communication through the RSIU-5 command radio stations, communication radio stations, as well as for receiving signals from the first and second radio compass sets.
Auxiliary communication points installed in various compartments of the aircraft serve for communication between the maintenance personnel during the development and tuning of radio equipment and other aircraft components.
The speaker set includes:
amplifier;
four subscriber devices;
three branching blocks;
eight four-contact buttons K-4M;
headband with TA-4 phones and LA-5 throat phones (four sets);
foot PTT;
box 14-T start relay;
five semi-sockets with cords for installing auxiliary voice points in the places where the equipment is installed.
The SPU-7 amplifier has two push-pull stages of low-frequency amplification, in which germanium triodes are used. Both push-pull amplifying stages are assembled according to a grounded emitter circuit and have a transformer connection between them.
Schematic diagram of the amplifier is shown in fig. 263. The amplifier has two push-pull stages of low-frequency amplification, in which germanium triodes are used. Both stages are assembled according to a grounded emitter circuit and have a transformer connection between them. The first cascade amplifies the power of the currents coming from the throat phones through the input transformer 1 to the value necessary to excite the second cascade.
The alternating voltage amplified by the first stage is supplied to the bases of the triodes of the second stage through a transition transformer 2, which serves to match the output resistance of the first stage with the input resistance of the second stage of the amplifier.
The alternating voltage of the signal, amplified by the second stage, is fed through the output transformer 3 to the telephones of the subscribers when working on the internal communication network of the aircraft. From the primary winding of the output transformer 3, through resistances 4 and 5, voltage is supplied to the emitters of the triodes of the first stage
negative feedback, which reduces non-linear distortion when the output load of the amplifier changes.
For smooth control of the gain, there is a variable resistance 6 connected in parallel with the secondary winding of the input transformer.
Subscribers' throat phones are powered by an amplifier through pins 1 and 2 of connector 7. Plus, the throat voltage is removed from the divider formed by resistances 8 and 9. Inductor 10 and capacitor 11 form a filter in the throat phone power circuit, which serves to protect against interference from the aircraft's on-board network.
The voltage of the aircraft on-board network is supplied to the amplifier circuit through pins 4 and 5 of connector 7. The filter, consisting of a choke 12 and a capacitor 13, serves to protect against the penetration of interference from the aircraft on-board network into the positive power supply circuit.
To protect the amplifier circuit from incorrectly connecting the polarity of the on-board network of the aircraft, diode 14 is included in the positive power circuit. The output voltage of the amplifier is taken from pins 3 and 4 of connector 7. In the subscriber unit, the throat phones and the subscriber's phones are switched to various types of communication, as well as switching the trigger circuits radio stations.
When the circular call button is pressed, the phones of each subscriber switch to the output of the SPU-7 amplifier, while remaining connected to the output of the receiver of their radio station. In this case, the signal of the receiver of your radio station is attenuated in comparison with the signal transmitted through the intercom circuit.
The laryngophones of the subscriber who has pressed the circular communication button are connected through the contacts of this button to the input of the SPU-7 amplifier. The throat phones of all other subscribers remain connected to the types of communication to which they were connected before receiving a circular call.
When the call button is released, all subscribers return to the type of communication they were on before receiving the call. The call is answered via the intercom network.
To enter the intercom, the subscriber either presses the "SPU" button during reception and transmission, or, by setting the "SPU - work" switch on the subscriber unit to the "SPU" position, presses only when transmitting to any of the "SPU" or "Transmission" buttons .
When the subscriber switches to internal communication, his phones are connected to the output of the STC, remaining connected to the output of the receiver of his radio station.
To control the volume of phones on the subscriber unit, there are two controls. One of them (“Radio”) regulates the volume of listening to an external communication signal when working on the internal network or during a circular call, the other regulator sets the volume of the STC. By means of connecting blocks, wires are connected that are suitable for them from subscriber sets and individual buttons.
The SPU-7 kit includes two four-contact buttons of the K-4M type, which are used to simultaneously turn on two circuits. The "Transmission" button (for pilots it is called "Radio") turns on the chain of laryngophones and the circuit for starting radio stations, and the "SPU" button turns on the chain of laryngophones. The foot PTT duplicates the “Transmit” button installed on the radio operator and allows him to free his hands for recording.
RADIO COMMUNICATION EQUIPMENT
AIRCRAFT INTERCOM SPU-8
PACKAGE AND PLACEMENT
The main elements of an aircraft intercom are:
Low frequency amplifier with power supply
Subscriber sets
Switching devices
The AA1 subscriber unit is a switching device and an isolation amplifier, with the help of which the aircraft headset is connected to the selected radio devices, communication networks are switched, access to circular communication and separate volume control of signals.
AA1 subscriber sets are installed at the workplaces of pilots, navigator and radio operator.
Redundancy switches RESERVE - SPU are installed at the pilots' workplaces, the navigator's upper shield, the radio operator's panel, the senior onboard technician and the operator.
The selective communication panel is installed on the control panel for the protection and cargo hatches of the crew commander under the AA1 subscriber unit.
The trigger is mounted on the handle of the steering wheel steering wheel: for the crew commander - on the left handle, for the assistant commander - on the right.
GOVERNING BODIES
The controls are located on the subscriber unit AA1, SCHIS-1. On the front panel AA1 (Fig. 1) are located:
Switch SPU - RAD, designed to select the preferred network (main)
NETWORK 1-2 switch for connecting a subscriber unit to one of two communication networks
Radio communications switch RAD, connecting the launch circuit and aircraft headset to the selected radio device during installation
UK1 - to the R-862-1 radio station UK2 - to the R-862-2 radio station KR - to the R-847 radio station T No. 1 SR - to the radio station R-847T No. 2
DR1 - to course receiver KUSR-MP-2-I
DR2 - to the course receiver KUSR-MP-2-II DP - to the receiver RSBN-7S or SDK-67 when it is turned on
RK1 - to the r / compass ARK-15-1 or ARK-U2 when it is turned on
RK2 - to the ARK-15-11 radio compass
PLAY switch connects the output of the receiver to be listened to additionally.
| - |
The position of the switch corresponds to the position of the RAD switch. OFF position not used.
The CB button for a circular (general) call to all network subscribers switches the subscriber sets to the circular communication mode between all subscribers, regardless of the position of the switches on them (this ensures that all subscribers listen to the call signal with maximum volume) potentiometer knobs RAD, SPU, PROSL. designed to adjust the volume of signals in phones.
The RAD regulator regulates the volume of signals from the output of the receivers selected by the RAD radio communications switch. The STC regulator regulates the volume of the intra-aircraft communication signals.
PROSL control adjusts the volume of signals from the output of the receivers selected for additional drying.
Shield of selective communication SCHIS-1 (Fig. 2) is intended for the selective call by the crew commander of any of the five crew members. The switches on the front panel. SCHIS-1 are used to transfer the subscriber unit of the crew commander and the called subscriber to the electoral network. Switches cause:
AB1 - navigator
AB2 - radio operator
ABZ - Senior Onboard Technician
AB4 - feed operator
AB5 - crew commander
The SPU-RADIO trigger provides pilots with access to external and internal radio communications. When the trigger is pressed to the first click, the internal radio is connected, to the second click
to external radio.
COMMAND RADIO R-862M
PACKAGE AND PLACEMENT
Two sets of R - 862M are installed on the aircraft. The first set with a built-in emergency receiver of the MV range, the second - with a built-in emergency receiver of the UHF range. The transceiver of the first set is located in the technical compartment of the radio equipment, on the starboard side, on the radio shelf, between frames No. 12A and 13. The transceiver of the second set is located under the transceiver of the first set. The radio control panels (two panels per set) are located on the upper dashboard of the pilots and on the radio operator's dashboard: With the control panel of the first set is installed on the left side, the second set on the right side.
AShS-GM antennas of the first set are installed in the lower part of the fuselage, along the axis of symmetry of the aircraft, between frames No. 23 and 24; second com-
plecta - in the upper part of the fuselage, to the right of the axis of symmetry of the aircraft, between frames No. 14 and 15.
GOVERNING BODIES
The radio station is controlled remotely, carried out from the control panel (Fig. 3) . On the radio control panels of the pilots and the radio operator are placed:
- a type-setting (NU) or storage (RAM) device designed to select one of 20 fixed, pre-configured communication frequencies (with NU) or any of 9200 frequencies (with NU);
AP switch for connecting listening to the emergency receiver;
AP lamp for light indication of receiving a signal from an emergency radio station;
PN switch to turn on the receiver noise suppressor;
AM-FM switch to select the type of operation of the radio station;
Switch UPR to enable control of the radio station from this remote control;
UPR lamp for signaling that control is taken from this remote control.
COMMUNICATION RADIO R-847T
PACKAGE AND PLACEMENT
1. Reference oscillator receiver - exciter, power supply unit and power amplifier are installed in the rear fuselage, between frames No. 82-85.
2. P7T-G control panels are installed on the panel of the pilot's right console.
3. The LVP antenna is a rigid metal structure and is made in the form of a nose spinner of a keel fairing.
4. The ANTENNA switch has three positions: KV1, TX KV1 / PRM KV2, KV2 provides two-way communication over the KV1 radio station (position
KV1) and via radio station KV2 (position KV2) or transmitting via radio station KV1 and receiving via radio station KV2 (position Tx KV1 / PRM KV2).
GOVERNING BODIES
On the pilot's control panel (Fig. 4) there are controls and signaling of the operation of the radio station:
Switch ON -RADIST, designed to connect the control panel to the radio station. If it is set to RADIO, the radio is controlled from the radio operator's console. Signaling about the connection of the control panel to the radio station is the glow of the control panel illumination lamps and the corresponding indicator lamps;
Switch of types of works AM-OM. In the AM position, the radio station operates in telephone mode with amplitude modulation, in the OM position - in the single-sideband modulation mode;
The CHANNELS switch is designed to tune the radio station to one of the 18 communication frequencies pre-set on the memory device;
- the RRU-ARC switch is designed to change the gain control mode of the receiver. In the AGC position, the signal amplification control by the receiver is automatic, the signal volume is changed by the VOLUME controller, in the RRU position, by the VOLUME controller. receiver gain is manually adjusted;
Handle SELF-LOCKING serves to adjust the volume of self-listening signals during transmission;
The PRM board indicates the readiness of the radio station to work in the "Reception" mode
- the PRD board indicates the readiness of the radio station to transmit, while the PRM board goes out;
The red signal lamp RADIATION lights up in time with the transmitted information, at the same time the PRD display is lit;
Scoreboard NAST. signals about the operation of the radio station in the tuning mode, while the PRM board is lit at full heat. The radio cannot be used during this time;
The THERMO board lights up when the thermal regime is violated in the radio station blocks. When the THERMO board is triggered, the radio station can only work for reception;
The BARO board lights up when the pressure in the sealed units drops below 460mm. rt. Art. The operation of the radio station is possible only for reception.
IN-FLIGHT USE
1. Before turning on the power, set the controls on the P7T-G pilot console to their original position:
Set the ON-RADIST switch to the ON position;
Set the AM-OM switch to the AM position;
Set the AGC-RRU switch to position a AGC;
- Use the CHANNELS switch to set the communication channel.
2. Power on:
At RU24, RU42, RU44 turn on the NPP KB1, KV2;
Switch on NPP at RU22: INSTRUMENTS. BOARD 2 LINE OF RIGHTS; SECOND LINE RADIO OPERATOR;
Turn on the SPU-8 power supply.
3. On the subscriber unit SPU-8 of the right pilot, install:
Radio communications switch RAD. - in the position of the KR;
Volume control RAD. - at maximum volume;
SPU-RAD switch. - to the RAD position.
Check the connection of the aircraft headset to the SPU connector.
4. On the radio operator panel:
Set the ANTENNA switch to position KV1;
Turn on the power to R-847T No. 1 using the KV1 switch.
AIRCRAFT REC MC-61
SET AND PLACEMENT.
Two recorders with one control panel are installed. The main and backup recorders are completely identical. To preserve the cassettes with a sound carrier, the recording devices are placed in armored sealed casings, which are painted orange and installed on the frame on the port side, between frames No. 68-70.
The control panel is installed on the control panel for the protection and cargo hatches of the crew commander. Switch CHECK MS-61 and
light board FAILURE OSN. MS-61 are installed at the workplace of the crew commander next to the tape recorder control panel.
CASE FOR SPARE CASSETTES MS-61B is designed for storing cassettes. The tape recorder is not included. Placed in the technical compartment on the right hand side. on frame No. 14
GOVERNING BODIES.
1.
Toggle switch "ON-OFF" - to turn on the power.
2. Toggle switch "ONLY WORK AUTO START" to select the operating mode of the tape recorder.
3. Toggle switch "SPU - LAR" - in the LAR mode, the recording amplifier is directly connected to the microphone of the aircraft commander's headset.
4. Lamp "Record" - signals the operation of the tape recorder.
5. Knob "BACKLIGHT" - to adjust the brightness of the remote control backlight.
4.3 FUNCTIONAL CHECK AND USE IN FLIGHT
The tape recorder is turned on before starting the engines, and turned off after the engines have completely stopped.
On the tape recorder control panel, set the SPU-LAR switch to the SPU position, the AUTO START - CONTINUOUS OPERATION switch to the CONTINUOUS OPERATION position, the power switch ON. -OFF - to the ON position. Make sure that the RECORD and BACKLIGHT lamps are lit, the BACKLIGHT knob adjusts the brightness of the console backlight. Press the RADIO trigger until the first click and, by the presence of self-listening of your transmission and the burning of the RECORD lamp, make sure that the main tape recorder is capable.
Set the SPU-LAR switch to the LAR position. Speak the set text into the microphone of the aircraft headset. By the presence of self-listening, make sure that the main tape recorder is working. Press the CHECK MS-61V switch in
the RESERVE position and check the backup tape recorder in the SPU and LAR modes. At the same time, the FAILURE OSN display will light up. MS-61B. The RECORD lamp remains lit. Release the switch handle CHECK MS-61B. Scoreboard FAILURE OSN. MS-61 B will go out. In flight, use the "Continuous operation" mode. In the LAR mode, the crew commander is disconnected from access to external and internal radio communications, listening to commands and signals at a reduced volume is provided.
SET AND PLACEMENT.
1. The flight attendant's shield is installed on the radio shelf of the technical compartment of the cockpit (frames 12-13).
2. Two U-15P amplifiers are installed on the radio shelf of the technical compartment of the cockpit (frames 12-13).
3. The SGU-15 microphones are located at the workplaces of the crew commander and crew, connected to subscriber units.
4. The SGU-15 volume control is installed on the crew commander's shield. It is used to reduce the acoustic coupling between the crew commander's microphone and loudspeakers.
5. Sound speakers are installed on the left and right sides of the cargo compartment, 10 speakers are installed along each side (BGR-14 loudspeaker unit).
GOVERNING BODIES.
1. SGU-15 microphones are connected to subscriber units and serve to alert personnel.
2. The SGU-15 volume control is used to reduce the acoustic connection between the crew commander's microphone and the loudspeakers.
PACKAGE AND PLACEMENT
Two sets of ARK-15M are installed on the aircraft. (The first set is installed on the port side, the second - on the starboard side).
The composition of the first and second sets of radio compasses includes:
Receivers located in the area of sp. No. 48;
Control panels (two per set) located on the top panel of the pilots and on the dashboard of the navigator;
Loop antennas located in the upper part of the fuselage, under the radio-transparent fairing along the axis of symmetry, in the region of sp. No. 50;
Omnidirectional stub antennas located on a radio-transparent fairing (left - 1 set, right - 2 sets);
Matching devices located near the input of omnidirectional antennas.
PACKAGE AND PLACEMENT
1. The antenna unit is located in the bottom cutout No. 28 and is closed with a radio-transparent insert.
2. Antenna amplifier, located next to the antenna unit. 3. The R-852 receiver with a switching room is located at the radio operator's workplace, in the area of \u200b\u200bsp. No. 11.
On the front panel of the R-852 receiver there are:
Channel switch for tuning the receiver to four fixed frequencies;
RWG regulator to adjust the volume of the signal.
one . The control circuit block is located in the upper part of the fuselage, in the area of \u200b\u200bsp. No. 11.
2. The control panel is located on the upper panel of the pilots (Fig. 7 ).
On ne 
The front panel of the remote control contains:
ON switch to turn on the power;
Switch L-RAMKA-P, designed for manual rotation;
Frames when checking performance;
SENSING switch V-M, designed to change the value of the braking torque of the frame rotation motor.
3. Antenna ASHS-GM, located in the upper part of the fuselage along the axis of symmetry, in the area
sp. No. 11 .
4. Pointer VSUP-2, located on the dashboard of the navigator.
SET AND PLACEMENT RV-5M
Two sets of radio altimeters are installed on the aircraft, and their synchronous operation is ensured.
The first set (radio altimeter RV-5M) includes:
The transceiver located in the technical compartment, in the area of sp. No. 51; horn transmitting antenna, located in the lower part of the fuselage along the axis of symmetry, sp. No. 4 9;
The horn receiving antenna is located in the lower part of the fuselage along the axis of symmetry, sp. No. 52;
Height indicators (2 pcs.): UV-5M-1 - on the instrument panel of the left pilot (the main indicator with a scale of up to 750 m), UV-5RM-1 with a scale of up to 1000 m - on the navigator's instrument panel;
Display "DANGEROUS HEIGHT" on the instrument panel of the left pilot (the signal on the display is issued only from the UV-5M-1 pointer of the left pilot);
Panel "TURN OFF RV-5" and power switch RV-5 LEV. on the left horizontal panel;
The second set (radio altimeter RV-5M) includes:
Transceiver installed in the front trunk, sp. No. 33;
Antennas, receiving and transmitting, placed on the bottom of the fuselage along the axis of symmetry, respectively, sp. No. 35-38;
Height indicators (2 pieces) with a scale up to 750m - on the dashboard of the right pilot. UV-5M-4 above the instrument panel of the left pilot (additional pointer with a scale of up to 120 m);
Display "DANGEROUS HEIGHT" on the instrument panel of the right pilot, the signal on the display is issued only from the indicator UV-5M-1 of the right pilot;
Panel "TURN OFF RV-5" and power switch RV-5 RIGHT. on the right vertical panel.
The signals for the "TURN OFF RV-5" boards of both sets come from the altitude signaling devices (barorelay SVU-12-1A), starting from a height of 2500m. When the aircraft descends to an altitude of 2500 m or less, the baro relay ensures the inclusion of radio altimeters, regardless of the position of the power switches RV-5 LEV. (RIGHT).
SVU-12-1A is installed in the lower part of the fuselage, under the antenna radome KP-2V.
IN-FLIGHT USE
In flight, radio altimeters do not require control and adjustments. They are switched on after starting the engines. At temperatures below -20°C
time of readiness for work - 10-15 min after switching on. At an ambient temperature of +60C, radio altimeters can operate for no more than 15-20 minutes.
When flying outside the operating range, at altitudes of 1000 - 2000m, the arrows of the indicators will be set in the darkened sectors of the scales.
IF they are not turned off, at an altitude of 2500m, the "Turn off the RV-5" board will light up upon a signal from the SVU-12-1A. In the future, when descending, the SVU-12-1A will automatically turn on the radio altimeters at an altitude of 2500m, if they were turned off.
When flying over mountainous terrain, do not turn on radio altimeters. Set target height index to 700m. The board "TURN OFF RV-5" will be permanently lit.
Radio altimeters provide data on the true flight altitude at roll and pitch angles not exceeding 15°. At roll and pitch angles of more than 15°, the measurement error increases; with roll and pitch over 30°, do not use altimeter readings.
When flying over a thick layer of ice and snow, radio altimeters measure height with a greater error, since the measurement is made from the lower edge of the ice and snow cover. True altitude is only measured over wet ice and snow.
If the radio altimeter fails in flight at altitudes below 750 m, the blender will open on the scale of the corresponding indicator. After landing, radio altimeters must be turned off.
PACKAGE AND PLACEMENT
1. Monoblock receivers - for receiving, converting and separating azimuth and range channels, signals from navigation and landing radio beacons. It consists of two receivers ADPK-1, a signal combining unit and an FAI unit, located on a shock-absorbing frame. It is located in the technical compartment of the cockpit, on a shelf on the starboard side, between sp. No. 9-10
2. The monoblock BIO consists of a block for measuring azimuth and range (VIAD), an interface block (BC), a testing block (VO) located on a shock-absorbing frame. Performs azimuth and range measurements. Gives the values of az. and. range in UVK to correct the current coordinates, as well as GOT signals. And GOT. D in UVK and on indicator blenders. Converts measured azimuth and range values into indicator readings. Located next to the SZD-PM.
3. The switching monoblock consists of a landing signal switching unit (LKP) and a relay unit (BR) mounted on a common shock-absorbing frame. Located next to Bio.
BKP serves to connect the output signals of the RSBN-7S and KURS-MP-2 landing channels to SAU-1T-2B and NPP and KPP devices, as well as to automatically connect the landing channels of the second set
when the first fails. The BR provides separate tuning of the ADPK-1 receivers, the SZD-PM transmitter in the NAVIGATION, NAVIGATION-LANDING and LANDING modes. In addition, the relay unit provides communication between the RSBN-7S equipment and the TKS-P, UVK, KURS-MP2 , SDK-67.
4. The navigation channel switching panel (ShPNK) and the T4-U2B board, signaling that the systems are in the "LANDING" mode, are located at the navigator's workplace.
5. The board for switching landing channels (ShPKP) is located on the navigation and landing panel of the upper pilots board.
6. The radio systems selector (SRTS) is located on the navigation and landing panel.
7. Radio station range indicator (IDR-2). One indicator is placed on the dashboard of the left pilot, the other on the dashboard of the navigator.
8. Digital azimuth indicator (CIL-1) - on the navigator's dashboard.
PERFORMANCE CHECK
INCLUSION. Make sure that:
Circuit breakers at RU26 RSBN; at RU24 RSVN-RIGHT, SIGNAL; at RU23 RSBN-LEV; on RU22 RSBN-PION, RSBN BIO SZD are included;
On the SPU subscriber unit, the PROSL switch. stands in the position of DP;
VOLUME switch. ON on the control panel SDK-67 is in the off position. On the navigation and landing panel, turn on the RSBN-7S POWER toggle switch. Depending on the set operating mode, the NAVIGATION or LANDING display or both displays will light up on the NAVIGATION and LANDING panel.
If the RSBN-7S equipment receives signals from terrestrial radio beacons, indicator blinkers will open, signaling the serviceability of the range and azimuth channels, and the range and azimuth will be displayed. The call signs of the radio beacon are heard in the telephones at the workplaces of the pilots, navigator and radio operator.
IN-FLIGHT USE
To ensure high reliability, the onboard equipment channels are duplicated.
The NAVIGATION mode is switched on on the control panel. At the same time, the NAVIGATION panel will light up on the SCHPKN panel. Set the working channel on the SCHPKN. If the aircraft is within the coverage area of the radio beacons, the TsIA-1 and IDR-2 will raise the blenders, and the instruments will show the range and azimuth of the aircraft relative to the beacons.
The transition to work with another beacon is made from the SCHPKN shield. Based on the azimuth and range signals, the aircraft coordinates calculated in the UVK are corrected. When the IDENTIFICATION toggle switch is turned on, the mark on the ground PPI splits into two. The radio beacon call signs are transmitted over the ground indication channel.
The NAVIGATION-LANDING mode is set on the SCHPKP panel. At the same time, the "NAVIGATS." display will light up on the panel of the SCHPKN. and "LANDING". When the mode is turned on, the SZD-PM transmitter and the second ADPK-1 (right) operate in the NAVIGATION mode. The working channel is installed on the SCHPKN. If the aircraft is in the range of radio beacons, the azimuth and range to this radio beacon are displayed on TsIA-1 and IDR-2. Correction of UVK, operation of the ground identification channel and ground indication are provided, the call signs of the radio beacon are listened. If the azimuth and rangefinder channels fail, the readings of the instruments are crossed out.
The first ADPK-1 (left) operates in the "LANDING" mode, the landing channel is installed on the ShPKP shield. On the RTS selector, the system switch is set to the KATET position. At the same time, the RSBN display will light up at the navigator, if the aircraft enters the PRMG-4 (PRMG-5) coverage area, the READY display will light up on the SCHPKP. K, READY. Г on the RTS selector, the GOT display will light up. P, GOT. K1, at the NPP, the K and G blenders will close;
In case of failure of the course and glide path channels on the RTS selector, the GOT display goes out. K1, GOT. G1, on SCHPKP - READY. K, READY. G, blenders will open at the NPP.
LANDING MODE is activated when the mode switch on the ShPKP panel is set to the POS position. and the RTS selector switch to the KATET position. The "LANDING" board will light up on the panel of the SCHPKN, on the navigator's instrument panel - scoreboard "RSBN". Use the channel switch on the ShPKP panel to set the landing channel.
If the aircraft enters the PRMG-4 (PRMG-5) coverage area, the READY indicator will light up on the control panel. G, READY. K, on the RTS selector - GOT board. K1, GOT. G1, GOT. K11, GOT. G11. Blenders K and G will be closed at all NPPs.
When the landing mode is turned on, the azimuth channel stops working, and the rangefinder channel of both receivers works with the rangefinder repeater installed on the PRMG-4 glide path beacon. IDR-2 will show the range to the taxiway. Signals PRMG-4 (PRMG-5) are received by the ACS at the position bars of the NPP and the checkpoint. Hold
vat in the middle of the circle. During automatic landing, the aircraft is stabilized by the SAU-1T-2V system.
If the first receiver fails, the second receiver is automatically connected, the GOT display goes out on the SRTS. K1, GOT. G1.
If the second receiver fails, the GOT display goes out. K11, GOT. 11. If the system fails during landing, the boards on the RTS and READY selector go out. K, READY. G on the ShPKP shield.
PACKAGE AND PLACEMENT
1. The equipment of the KURS-MP-2 system consists of two identical semi-sets that operate independently of each other. Each semi-set includes: course radio receiver KRP-200P, glide path radio receiver GRP-20PM, navigation device UN-2P, block of ready signals BSG, marker receiver MRP-ZPM. (The listed equipment is combined into a monoblock on a shock-absorbing frame and is located on the starboard side of the navigator's cabin, between sp. No. 4-10).
2. Heading angle indicators (three) are installed on the instrument panels of the pilots and navigator.
3. BUP amplifiers (three) are located next to IKU-1A.
4. Course selectors (two) are located on the instrument panels of the pilots,
5. The control units of the first and second sets, the SP-50 balance unit, the RTS selector, as well as the KURS-MP - POWER and MARKER toggle switches, the IKU-1 switch, are installed on the upper shield of the pilots.
6. The ILS-VOR switch is on the right horizontal pilot console.
7. The scoreboard of the marker receiver (two) is located on the dashboards of the pilots.
8. The mode activation panel is located on the navigator's dashboard.
9. The marker receiver antenna (one) is located in the lower part of the fuselage, between frames No. 44-45. To receive signals from the VOR, ILS, SP-50 radio beacons, the front unit of the PION-NP-76 antenna-feeder system is used, located under the KP-2 antenna radome.
CHECK BEFORE FLIGHT
1. Set the mode switch on the RTS selector to the VOR position, while the VOR display on the RTS selector and on the navigator's dashboard will light up.
2. Set the IKU-1 switch to the LEV position. LETCH., set the switches on IKU-1A to the position VOR1, VOR2, set the switch ILS-VOR to the position ILS.
3. On the control units of each half-set, dial the frequency of the VOR beacon. If the aircraft is in the coverage area of the VOR beacon, the GOT display on the RTS selector will light up. K1, GOT. K2, at the NPP pilots and navigator will close the K.
4. To listen to the call sign of the VOR beacon on the SPU-8 subscriber unit, the switch PROSL. set to position DR1, (DR2) for the first (second) half set.
5. Perform a similar check of the equipment in the SP-50 and ILS modes. At the same time, the SP and ILS displays, as well as the GOT, will light up on the RTS selector and the navigator's display. K1, GOT. K2, GOT. G1, GOT. G2. Blenders K and G will be closed at the checkpoint if the aircraft is in the coverage area of the heading path beacons.
IN-FLIGHT USE
PACKAGE AND PLACEMENT
1. Block SDK-67 is designed to generate encoded request pulses, receive and decode beacon response signals.
Placed in the cargo compartment on the port side, in the area of sp. No. 26.
2. The control panel is designed to turn on the range finder, select the operating frequency and operating mode. The control panel is located on the left horizontal panel of the pilot.
3. Antenna LM-001 quarter-wave asymmetric vibrator) is designed to receive and transmit signals of vertical polarization. The antenna has an omnidirectional radiation pattern in the horizontal plane. It is located in the lower part of the fuselage under the radio transparent fairing, in the area of \u200b\u200bsp. No. 26.
4. IDR-2 from the RSBN-7S set is placed on the dashboard of the left pilot.
IN-FLIGHT USE
Turn on SDK-67, check the inclusion of RSBN-7s. Set the frequency value on the scale corresponding to the operating channel of the DME beacon according to the flight task. When working with the rangefinding channel of the TASA# radio beacon, it is necessary to set the frequency value on the control panel corresponding to the channel number:
Channels 1-16 correspond to the dialed value of 134.4-135.9 MHz (through 0.1 MHz);
Channels 17-59 - dialed value 108.0-12.2 MHz (through 0.1 MHz);
Channels 60-69 - dialed value 133.3-134.2 MHz (through 0.1 MHz
Channels 70-126 - dialed value 112.3-117.9 MHz (through 0.1 MHz).
Set the DME-RESERVE switches to the DME position. At the same time, the DME display will light up at the navigator and, if the aircraft is in the radio beacon zone, the blender will be removed on the IRD-2 and the range to the radio beacon will be displayed.
The volume level of listening to callsigns is regulated by the VOLUME knob. ON
If necessary, transfer the rangefinder to the "hot" standby state, set the DME-RE-RESERVE switch to the RESERVE position. In this case, the indications of IDR-2 will be crossed out with a blender.
If the rangefinder channel fails, the IDR-2 blender crosses out the readings. Turn off the rangefinder after the flight.
PACKAGE AND PLACEMENT
1.
The monoblock is mounted on a folding radio-transparent fairing located in the cutout of the skin of the lower part of the aircraft fuselage, in the area
sp. No. 32.
2. Low-frequency units DISS-013 and a communication unit with other systems are located in the area of sp. 3. The indicator is installed on the navigator's dashboard.
7.2. CONTROLS AND INDICATORS
The computer has a "MEMORY" mode, in which the last W and B values before the disappearance are stored and fed into the indicator (Fig. 15). In this case, the output of information to external consumers is stopped and the search for signals is carried out.
When flying over the sea, the S-M "LAND-SEA" switch located on the indicator changes the operating mode of the calculator. In this case, the calculated value of I" increases by 1.3. The correction is due to a different nature of the reflection of radio waves from the sea surface and the appearance of the so-called displacement error when measuring Doppler frequencies.
7.3. PERFORMANCE CHECK
DISS-013 is powered by a voltage of 36.115V, a frequency of 400Hz and a voltage of 27V through the DISS NPP at RU21, RU23, RU25. After switching on the NPP, the backlight of the indicator scale and display P should light up.
After 2.5 min. switch K-P set to position K (CONTROL). The display panel P should go out on the indicator and the values of the ground speed of 697 + 19 km / h and the drift angle of 0 + 1.5 ° should be worked out. Set P (WORK) mode. The meter enters the memory mode - the panel P lights up. The readings should not change by more than +11 km / h and +1.
In addition to the indicator, the drift angle is displayed on the navigator's NPP - constantly and regardless of the ACS operating mode.
At the pilots' NPP, the drift angle is given only in the operating modes of the self-propelled guns "KURS", "NAVIG." and when performing a pre-landing maneuver according to UVK signals.
PACKAGE AND PLACEMENT
1.
Monoblock A-711-1 is placed on the shock-absorbing frame A-711-1 and in the navigator's cabin on a shelf, between frames No. 8-10. equipment, indication of operating modes and navigation parameters, is placed on the navigator's dashboard (See Fig. 16).
2. Loop antenna A-711-A, - for receiving signals from ground stations is located in the upper part of the fuselage, between sp. No. 51-59.
3. The A-711-2 matching unit, for amplifying signals at earth stations and transmitting them to the receiver, is located next to the stub antenna between sp. No. 51-52.
PACKAGE AND PLACEMENT
1. Block CO-63 is designed to receive, decode request signals and generate response signals. It is located on a shock-absorbing frame in the rear fuselage, in the area of sp. No. 82-83.
2. The ICAO code scrambler (ICAO) is designed to decode interrogation signals and generate response information packages in the YV5 mode. Mounted on a shock-absorbing frame in the rear fuselage.
3. Antennas of the 3-cm range provide a view of the forward hemisphere in the horizontal plane in the sector of angles of ±90° relative to the direction of flight and +-30 C in the vertical plane. The receiving antenna AB-016 is located in the nose of the aircraft. The receiving antenna AB-014 is located on the starboard and port sides, between sp. No. 3-4.
4. A remote video amplifier (VVU) is designed to combine and amplify video pulses from receiving antennas in the 3 cm range. Placed on the shock-absorbing frame and forward fuselage in the navigator's cockpit.
5. The SO-63 control panel and the ICAO encoder control panel are designed to control the transponder during flights on intra-Union international airlines. Located on the left vertical panel of the pilot.
6. The blanking prefix is intended to protect the transponder from the influence of other systems on its operation. Located next to block SO-63.
7.
Transceiver antenna AZ-018 with a directional pattern of 360° in the horizontal and ±30° in the vertical plane. Designed to receive interrogations and transmit responses.
signals during operation in ATC and RSP modes. Placed in the upper part of the keel symmetrically
aircraft axis.
8. Receiving-transmitting antenna AM-001 with a radiation pattern of 360 in the horizontal plane and ± 30 in the vertical plane. Designed for receiving and transmitting UHF signals during flights on international airlines. It is located in the lower part of the fuselage, in the area of sp. No. 55 on the left. 1.2. GOVERNING BODIES
All controls of the defendant are located on the PU SO-63 and ICAO.
On the control panel SO-63 (Fig. 17) are located:
Switch SO-63 to turn on the transponder;
CONTROL button, to check the operability of the transponder from the built-in control circuit;
CONTROL lamp, to indicate the answer and the correctness of the transponder;
SIGN button to turn on the individual identification signal;
WAVE switch for selecting fixed transponder frequencies;
Toggle switch TROUBLE to turn on the alarm signal (distress);
Work with secondary radars of RBS systems, the parameters of which meet the requirements:
1) RSP (switch-on mode when working with PRL and DRL that do not have equipment for receiving information from the board);
2) ATC (switch-on mode when working with ADR "Narva-S", "Ekran-2M", P-32, "Cliff". The transponder automatically transmits information about the aircraft number, or flight altitude and fuel supply.
3) YV5 (the mode is activated when flying the State Border of the Russian Federation and is provided by ICAO).
4) 023M (mode not used).
On the control panel of the ICAO encoder are located:- four-position operating mode switch:
1) A (turned on to answer a request for a flight number with code A, for flight altitude - with code C);
2) B (similar to A, but the request for the flight number is carried out by code B);
3) C (switched on to respond to a flight altitude request with code C);
4) READY (D) - the mode in which the transponder input is locked when it is fully prepared for operation
DIAL switches for dialing one of 4096 flight number codes;
MCh toggle switch (turned on at the request of the dispatcher, if necessary, reduce the sensitivity of the main receiver in areas with a high density of ATC radars).
1. Purpose, basic tactical and technical data, the principle of operation of an aircraft intercom.
Aircraft intercoms (SPU) are designed to provide intra-aircraft communication between crew members and their access to external communication through other electronic devices. SPUs are installed on aircraft with more than one crew member.
Rice. 1. Generalized block diagram of the SPU
According to the principle of operation, the SPU is a radio-electronic amplifier with switching and control devices (Fig. 1).
The SPU set includes 1-2 audio frequency amplifiers, subscriber sets according to the number of crew members, as well as additional switching equipment. During the operation of the STC, head phones (usually built into a headset) and throat phones (microphones) are also used.
The STC amplifier is designed to amplify weak electrical signals from laryngophones or signals associated with the STC of other aircraft devices.
The STC subscriber unit is a switching device, with the help of which laryngophones can be connected to the input of the STC amplifier and aircraft radio transmitters, and telephones to the output of the STC amplifier or other on-board radio electronic devices.
To conduct intra-aircraft communication between crew members (STC mode), the laryngophones of the transmitting subscriber are connected to the input of the STC amplifier through the STC-RADIO button, and the phones of the remaining crew members are connected to the amplifier output.
To access the crew members to external communication through aircraft radio stations (“Radio” mode), throat phones are connected to the transmitter inputs, and headphones are connected to the receiver outputs, through the SPU-RADIO button, subscriber unit and amplifier,
To listen to signals from various on-board devices, the phones of the crew members are connected to the outputs of the corresponding devices through subscriber sets.
The following sound signals are usually given to the crew through the STC:
call signs of telegraphic signals of leading aerodrome radio stations or messages of broadcasting stations received by automatic radio compasses;
call signs of ground-based radio beacons of the short-range navigation radio system received by RSBN aircraft receivers;
signals of ground marker radio beacons received by the onboard marker radio receiver;
low-altitude radio altimeter signals warning the crew of the aircraft descending below the set altitude;
signals from the exposure warning station informing the aircraft crew about its exposure to radar stations for interception, aiming and homing;
one-time commands of voice informants that warn the crew about the appearance of failures of aviation equipment or some unacceptable phenomena.
In order to ensure high reliability of communication, the aircraft usually has several independent communication networks, and the STC includes an appropriate number of amplifiers.
The SPU-7 intercom (MI-8 helicopter) is designed for intra-helicopter telephone communication between crew members, for pilots to access external communications via (radio via command and communication radio stations, as well as for listening to the R-852 radio receiver and the ARK-9 radio compass.
Aircraft intercom SPU-7 is designed to provide intra-aircraft communication between crew members and their access to external communication through transceiver radio stations and other aircraft devices. SPU-7 is installed on aircraft with up to six crew members.
The intercom on the helicopter provides:
a) separate two-way intra-helicopter telephone communication between crew members:
when setting the "SPU-Radio" switches on subscriber sets to the "SPU" position,
when pressing the "Radio" buttons on the control knobs, as well as when turning on the "Laring." at an additional call point.
When conducting intercom, the right and left pilots simultaneously listen (with reduced volume) to the radio receiver of the radio station on which the radio switches on the subscriber units are installed;
b) implementation by each crew member of internal circular telephone communication with other crew members:
by pressing the "SPU" button on the control handle,
when you press the "CV" button on your subscriber unit,
when you press the "Call" button on an additional call point,
at any position of the radio switch knob and any position of the switches on subscriber sets.
At the same time, the right and left pilots simultaneously listen to the signal of the radio receiver on which the radio switch of the subscriber unit is installed;
c) the presence in the phones of the left and right pilots of the signals of the corresponding radio receivers in all positions of the handles of the radio communication switches with the buttons on the control handles not pressed and the “SPU-Radio” switches of the subscriber units set to the “Radio” position;
d) the implementation by each pilot of the launch and modulation of the transmitters of the command or communications radio stations in the first two positions "Kr", "Mr" of the radio communications switch knobs:
when setting the "SPU-Radio" switches on the subscriber units to the "Radio" position and pressing the "Radio" buttons on the helicopter control sticks;
e) smooth regulation of the level of speech transmitted over the internal or external communication network with the “General” volume control, the level of listening signals of the external communication network when working via the internal communication network, etc. signals of the intercom network when working on the external communication network with the volume control "Sil."
Basic technical data.
The power supply of the laryngophone circuits, the amplifier and the relay of subscriber sets is from the on-board network of direct current with a voltage of 27 V ± 10%.
Current consumption at 27 V:
a) amplifier - no more than 0.25 A;
b) one subscriber unit - 0.1 A.
The output voltage on six pairs of TA-56M telephones (when a signal with a voltage of 0.5 V, a frequency of 1000 Hz and the position of the amplifier gain control at maximum) is applied to the amplifier input through the equivalents of two pairs of LA-5 throat phones - 45-G-70 V.
The change in the output voltage when the number of connected pairs of TA-56M telephones is changed from six to two is no more than 20%.
The change in the output voltage when the number of switched on equivalents of the LA-5 throat phones is changed from two to one pair - no more than 25%.
The voltage gain is about 100.
The supply voltage of the laryngophones is Z-5 V.
SPU-7 kit on a helicopter.
The SPU-7 set includes: subscriber sets (according to the number of crew members), low-frequency voltage amplifiers (2 pcs.), remote SPU and TRANSMISSION buttons, junction boxes, additional connectors (subscriber points) in the technical compartments of the aircraft for communication with the technical composition during joint work on the preparation and maintenance of equipment.
The SPU-7 set can serve two independent aircraft communication networks. Each network operates independently of the other and has its own amplifier.
The SPU-7 intercom kit includes (Fig. 2):
1) amplifier; 2) subscriber units 2 and 3; 3) K4M buttons (6 pcs.); 4) extension cords 2 m long with contact socket and male half-connectors at the ends (3 pcs.); 5) extension cords 2 m long with contact female half-connectors at one end (2 pcs.).
Rice. 2 Intercom kit SPU-7
1-amplifier; 2, 3-subscriber sets; 4-extension cord
On a helicopter, the intercom works with two additional voice points:
for flight engineer
for the operator working with the onboard boom.
In addition, an additional button 5K "SPU" was introduced into the circuit, connected in parallel to the onboard engineer's call point switch.
The scheme of external connections of the intercom is shown in fig. 3.
Fig 3. Scheme of external connections of intercom SPU-7:
1-amplifier; 2-button K4-M; 3-subscriber device; 4, 5 extension cords; 6-additional voice point
Placement of SPU-7 by helicopter.
The SPU-7 amplifier is installed in the cockpit behind the right pilot's seat and is fixed to frame No. 5N with four screws (Fig. 4).
Rice. 4. Amplifier intercom SPU-7 on the right shelf in the cockpit: 1-amplifier SPU-7
The pilots' subscriber units are installed to the left and right of the gas station panels of the electric console on special brackets (Fig. 5). Each subscriber unit is fixed with four screws.
Rice. 5. Subscriber unit of the right pilot
An additional communication point for the flight engineer was installed in the opening of the pilot's cabin door in a special niche on the right (Fig. 6) and secured with four screws.
Rice. 6 The call point of the flight engineer in the doorway of the cockpit
An additional button "SPU" for the call point of the flight engineer is installed in the cockpit, on the right shelf, above the correction switch VK-53RSh.
An additional voice operator's voice point is installed in the cargo compartment, on frame No. 1, on the left side, next to the front door (Fig. 7) and secured with four screws.
Rice. 7 Additional voice operator's point in the cargo compartment
Buttons "Radio" and "SPU" are installed on each of the helicopter control sticks.
Governing bodies
The controls are located on the subscriber unit (Fig. 8).
Rice. 8 Subscriber unit SPU-7
On the SPU-7 subscriber unit there are:
switch of types of communication for six positions:
UKR (ultra-shortwave radio station),
SR (communication radio station),
RK1 (first radio compass),
RK2 (second radio compass or RSBN receiver);
switch NETWORK 1-2 for connecting the subscriber unit to one of the two communication networks;
SPU-RADIO switch for transferring a subscriber from internal communication (SPU) to external communication (RADIO) and vice versa;
CV button for circular (general) call of all network subscribers;
knobs of VOLUME: RADIO and GENERAL potentiometers for adjusting the volume of signals in phones. The GENERAL knob adjusts the volume of all signals coming from both internal and external communication networks. The RADIO knob adjusts the volume of signals that are not currently the main ones. So, if the STC-RADIO switch is in the STC (intercom) position, the RADIO knob controls the volume of external communication signals. If this switch is set to RADIO (external communication), then the RADIO knob controls the volume of internal communication signals between crew members.
Pre-flight check
To perform a pre-flight check, you must:
turn on the power supply of the SPU with a circuit breaker on the gas station panel;
connect the aviation headset connector to the SPU aircraft connector;
check the intercom networks, for which the STC-RADIO switch is set to the STC position, the NETWORK 1-2 switch to the position of the communication network being checked, press the STC or TRANSMISSION button (tangent) and clearly say the control phrase. The signal must be listened to in their own phones;
check the volume control of the intercom with the GENERAL and RADIO knobs;
check the second communication network, for which the NETWORK 1-2 switch is set to another position and repeat the test;
check the external communication circuits, for which turn on the radio stations, set the switch for the types of communication sequentially to the positions UKR, SR, CR, DR and, pressing the TRANSMIT button (tangent), clearly say the desired phrase. Signals from the outputs of the receivers of the corresponding radio stations must be listened to in telephones;
check the volume control of external communication signals FT of the GENERAL and RADIO knobs;
listen to the signals of external receivers, for which the switch of types of communication is set to the position PK1 and PK2. The telephones must listen to the signals of the automatic radio compass (RK1) or the RSBN receiver (RK2);
check the operation of the circular call circuit, for which press the CV button and say the control phrase. All network subscribers must confirm the reception of the signal, regardless of the position of the other controls of the STC, when the CV button is pressed, all associated external communication devices are turned off, therefore, it is possible to use a circular call only in exceptional cases and for a short time;
turn off the SPU and paired devices.
Note. Warning signals from a low-altitude radio altimeter, an exposure warning station, and a voice informant are transmitted to all crew members at any position of the controls on their subscriber units.
SPU-8 aircraft intercom (Mi-24V,D helicopter).
Aircraft intercom SPU-8 is designed to provide:
intra-helicopter telephone communication between subscribers in two networks (for this purpose, subscriber sets No. 3 are used);
external radio communication through two radio stations;
receiving signals from two navigation devices;
receive special signals.
The device provides at least 90% of verbal speech intelligibility when receiving and transmitting in acoustic noise with a level of up to 120 dB using LA-5 throat phones and TA-56M phones built into flight crew headsets.
The device can work with LA-5 throat phones, with DEMSh-1A microphones with their own amplifier, and with TA-56M high-resistance or low-resistance telephones.
The device provides the ability to connect radio receivers and radio navigation devices designed to work with high-resistance and low-resistance telephones TA-56M.
Main technical data of SPU-8
Frequency range - 300 . . . 3400 Hz
Supply voltage on one pair of LA-5 throat phones - 4.5 V ± 10%
Power supply - on-board DC network 27 V
Power consumed by one amplifier US-3 - 6 W
The output voltage of the amplifying path of the intra-helicopter telephone communication, consisting of the US-3 amplifier and three signal conditioners, must be within 55-75 V when the signal conditioner outputs are loaded on high-impedance telephones and a signal with a frequency of 1000 Hz and a voltage of 0 is applied to the input of the US-3 amplifiers. .5 V.
An isolation amplifier located in the subscriber's equipment should develop a voltage of 55-75 V on one pair of high-impedance telephones TA-56M connected to its output (when a voltage of 10 V with a frequency of 1000 Hz is applied to the input of the amplifier).
Completeness, purpose and placement of SPU-8 equipment on a helicopter.
The SPU-8 kit includes:
subscriber unit No. 3 (AA-3) - 3 pcs.;
amplifier US-3 - 2 pcs.;
divider block (BD1) - 1 pc.;
special purpose signal block (SSS) - 1 pc.;
Subscriber sets No. 3 are used to connect the subscriber's throat phones and headset phones to various means of communication, as well as to switch the power supply circuits of the starting relays of radio transmitters.
The pilot's subscriber unit No. 3 (Fig. 9) is installed in the cockpit on the pilot's left side console.
Rice. 9. Subscriber unit (AA-3)
The operator's subscriber unit No. 3 is installed in the cockpit on the operator's console.
The subscriber unit of the landing commander No. 3 is installed on the ceiling of the cargo compartment between frames No. 2 and 3.
US-3 intra-helicopter telephone communication amplifiers are used to amplify weak signals coming from broadcast sources included in the intra-helicopter telephone communication circuit.
The divider block (BD1) serves to match the output impedances of radio station receivers with a high-resistance output with the input resistance of SPU-8 subscriber sets, designed for direct connection of radio station receivers with a low-resistance output to them, and to lower the output voltage of these receivers to a value corresponding to the output voltage radio receivers with low-impedance output.
The Special Purpose Signal Block (BSS) is used to connect eight audio frequency signals coming from special signal sources to the SPU-8. Amplifiers US-3 (2 pcs.), a block of dividers BD1, a block of BSS and RK SPU are installed in the cockpit, on the port side, between frames No. 5N and 6N.
The button "SPU - Radio" of the pilot is located on the handle of the longitudinal-transverse control of the pilot.
The button "SPU - Radio" of the operator is located on the handle of the longitudinal-transverse control of the operator. The operator's foot PTT is installed on the floor of the cockpit at the operator's workplace. The "SPU" switch is installed on the operator's console,
In the cargo compartment, next to the subscriber unit No. 3, the "SPU" switch is installed.
SPU-8 is powered from battery tires I and H through fuses PM-2.
Governing bodies. Turning on SPU-8.
The SPU-8 is controlled from subscriber sets of helicopter crew members. The following controls are installed on the subscriber unit No. 3 (see Fig. 9):
the "SPU - Radio" switch is used to transfer the subscriber from the intra-helicopter communication network to the external radio communication network and vice versa;
the "Network" switch is used to switch the subscriber's phones and laryngophones from one intrahelicopter telephony network to another;
the biscuit switch of operating modes is used to switch telephones, laryngophones and starting circuits of the subscriber unit from one radio station to another;
the circular call button "CV" is used to carry out circular intra-helicopter telephone communication between subscribers;
volume control "SPU" is used to adjust the signal level from the output of the US-3 amplifier;
the volume control "Rad" is used to adjust the signal level from the output of the radio receiver.
The SPU-8 intercom is switched on by two "SPU-8.1-network-2" switches located on the rear top panel of the pilot's left side console.
The principle of operation of SPU-8.
Each subscriber has his own individual subscriber unit with an isolation amplifier, to which his TA-56M telephones are constantly connected.
The following can be connected to the input of the isolating amplifier at the same time:
output of one of the US-3 amplifiers for intra-helicopter telephone communication;
output of the receiver of one of the radio stations (P-860-1 or R-863, Karat-M24, Eucalyptus-M24) or one radio compass (ARK-15M, ARK-U2 with R-852 receiver);
outputs of four devices (RV-5, SZM, RI-65, VSB-24) of special-purpose signals.
Thanks to this inclusion, each subscriber has the opportunity to simultaneously listen to up to three different types of sound signals, without their possible shunting and influence on each other.
The pilot and operator exit to intra-helicopter telephone communication by setting the "SPU - Radio" switch on the subscriber unit to the "SPU" position and pressing the "SPU - Radio" button on the longitudinal-transverse control handle until the second click.
Intra-helicopter communication from the operator's seat using a foot PTT is performed similarly to setting the "SPU - Radio" switch on the subscriber unit to the "SPU" position.
Access to external radio communication (in the "Reception" mode) is carried out by setting the "SPU - Radio" switch on the subscriber unit to the "Radio" position and the switch of the operating modes on the corresponding radio station. Access to the "Transmission" mode is carried out by pressing the "SPU - Radio" button on the longitudinal-transverse control handle until the second click.
For prompt access to intra-helicopter communication between crew members, it is necessary to press the "SPU - Radio" button on the longitudinal-transverse control stick until the first click or turn on the "SPU" switch.
For circular intra-helicopter telephone communication between subscribers (voice call), you need to press the circular call button "CV" on the subscriber unit.
The subscriber who pressed the "CV" button calls the subscriber he needs and releases the button. After that, the calling and called subscribers for further conversation must go to the intra-helicopter telephone network, i.e., set the "SPU - Radio" switch on devices No. 3 to the "SPU" position, press the "SPU - Radio" button on the handle until the second click longitudinal-transverse control and be sure to include the same communication network 1 or 2.
The pilot's phones can listen to special-purpose signals coming from: the RV-5 radio altimeter (dangerous altitude alert), from the SPM equipment (radar radiation alert), from the RI-65 equipment (emergency alert), from the VSB-24 computer (announcement about the "Resolution of dead reckoning", about the preparation and release of special cargo). Listening to these signals is ensured by the presence in the set of SPU-8 of a block of special signals (BSS). The signal of the R-860-1 or R-863 command radio station can be heard through the special signals channel if the "ARK r/st-R/st" switch on the radio control panel is in the "ARK r/st" position.
Loading...