Radio aircraft
Radio aircraft

Radio planes. Communication between aircraft in the air.

Basic requirements for airborne radio stations: perhaps less weight and volume, maximum ease of maintenance.

Radio is the most valuable, when its range is equal to the radius of action of the aircraft. The range of the radio depends on:

  • a) transmitter power;

  • b) the quality and amplification ability of the receiver;

  • c) the location of the ground antenna (on an elevated site),

  • d) time of day and year — night and winter are more conducive to work than day and summer;

  • e) radio transmission forms: by wireless communication it is possible to overlap in 2 — 2,5 times the space than with a radio telephone of that the same capacity; if the telephone connection is difficult, it is necessary to move to telegraphy;

  • e) experience and the ability to achieve maximum radiation into the space of electromagnetic energy, and for working at the receiver from the ability to tune it to trap telephone or telegraph transmission;

  • g) the structure of the earth's crust; for example, the presence of magnetic masses greatly reduces the radius of action.

The positive properties of the radio.

  • 1. A variety of messages. Radio communication has unlimited transmission capabilities. The normal transfer rate from an airplane using Morse code 50 — 60 characters per minute. The radiogram in 25 words can be transmitted in approximately 3 minutes. The code rate increases even more; as for the transfer by telephone, the advantages of this type of transmission are self-evident,

  • 2. The possibility of two-way communication. Almost all aircraft radio stations include both a transmitter and a receiver.

  • 3. The possibility of simultaneous operation of several stations.

  • 4. The ability to work at any time and in any weather.

  • 5. Transfer in all directions, facilitating control (changing flight routes, giving new tasks, etc.) and determining the location of the aircraft.

Features a radio

  • 1. Simultaneous reception and transmission slows down the pace of operation, as a misunderstood word during transmission and beech distortion can be corrected only at the end of the transmission, after a request from the receiving radio station.

  • 2. The complexity of the maintenance of currently in service with radio stations. In addition, working as a Morse key and receiving telegraphic signals by ear require high-level technical readiness from the leters.

  • 3. The large weight of the equipment (from 35 to 75 kg and more) reduces the combat load.

  • 4. The exhaust antenna makes the plane less flexible with respect to figure flights: for performing figure flight and when landing the aircraft, the antenna has to be reeled off.

On the single fighter aircraft antenna made solely rigid (we not exhaust). Such antennas reduce the range of the radio station.

  • 5. The difficulty of organizing radio communications. Radio communication is possible

Only in the absence of disturbance from other working stations of the army. To overcome this obstacle serving radio network are broken down into each network with the appointment of a certain wavelength and the strict observance of radio discipline.

  • 6. Interference may occur for the following reasons:

a) saturation of small stations with radio stations at approximately the same wavelength range of operating radio stations; to some extent eliminated by the use of receivers with a great sharpness of tuning;

b) the interfering action of higher power radio stations, deliberately floated by the enemy on the wave that he wants to drown out;

c) atmospheric electric discharges, especially in summer, which sometimes make reception completely impossible.

  • 7. Interception by the enemy. The propagation of electromagnetic waves in all directions allows the enemy to intercept the transmission.

Intercept Radio

To avoid the possibility of interception of information transmitted by radio opponent, negotiations have to be conducted in an encrypted form.

For fast transmission and decryption of radio messages Samoletnaya transfer encoded.

When the transience of modern and dynamic battlefield to serve aviation communication requirements are as follows:

  • a) providing control from the aircraft;

  • b) the maximum, almost instantaneous, transmission rate;

  • c) the possibility of simultaneous transmission and reception;

  • d) the possibility of graphic transfer (schemes, maps, letters, photos);

  • e) the possibility of the simultaneous transfer of orders to all combat assets participating in the operation;

  • e) automatic reception and transmission;

  • g) secrecy and independence from the disturbing actions of the enemy.

Given the high demand and heavy-duty work on the aircraft, it is desirable to have as a basic means: radio alarm with automatic reception and television autographic communication (image transfer) and as complementary and redundant assets - wireless and cordless.

Auxiliary means of communication with the aircraft in the air

The alarm panel is used to send messages to land the plane. The cloth is made of dark blue color with embroidered on it in white cloth with the letter T and nine numbered processes. Scion open and close flaps in dark blue. Each of the nine processes of cloth has a constant digital value by up to 1 9.

The valves can be opened simultaneously in 1, according 2, 3, and so on.. Thus, with the help of a panel of the signal can be transmitted 511 different signals from which the components required for combined arms talks code.

With the simultaneous opening of two or more valves must be read as a signal of the number made up of a series of increasing numbers; for example, lined with cloth A signal is read «19», rather than «91» on panel B signal is read «268», rather than «628», or «286» and so on. d.

Unambiguous signals, ie. E. When you open one of the nine valves are transmitted only numbers.

If the post opens up signals according to the sequence, this means that he passed «287». If you want to pass more than one number, and a few, after the transmission of each of the transmitted signal «1239», having a constant value "mark section."

Each signal is laid out for a time from 6 8 seconds before depending on natrenirovannosti letnaba, then the signal is closed and through 4-5 seconds the next.

Signals double digit, starting from the signal «12», and multi-valued, opened at the same time serve for the transmission of letters of the alphabet, as well as for the transmission of whole words, the value of which is determined by the code table.