Aircraft radio communication. Communication means 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 gain of the receiver;

• c) the location of the ground antenna (on a high place),

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

• e) forms of radio transmission: a radiotelegraph can cover 2-2,5 times more space than a radiotelephone that the same capacity; if the telephone connection is difficult, it is necessary to move to telegraphy;

• f) experience and ability to achieve maximum radiation into space of electromagnetic energy, and for those working on the receiver from the ability to tune it to capture telephone or telegraph transmission;

• g) the structure of the earth's crust; for example, the presence of magnetic masses will greatly reduce the range.

The positive properties of the radio.

• 1. Variety of messages. Radio communication has unlimited transmission possibilities. Normal Morse code transmission rates from aircraft are 50-60 characters per minute. A 25-word radiogram can be transmitted in about 3 minutes. The code transfer rate is increased even more; as for the transfer by phone, the advantages of this type of transfer are obvious by themselves,

• 2. Possibility of two-way communication. Almost all aircraft radios include both a transmitter and a receiver.

• 3. Possibility of simultaneous operation of several stations.

• 4. Ability to work at any time and in any weather.

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

Features a radio

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

• 2. The complexity of servicing the radio stations currently in service. In addition, working with the Morse key and receiving telegraph signals by ear require high technical training from the flyers.

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

• 4. The exhaust antenna makes the aircraft less flexible with respect to figure flights: to perform figure flight and when the aircraft lands, 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. Difficulty organizing radio communications. Radio communication 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. Interfering action can take place for the following reasons:

a) saturation of small areas with radio stations with approximately the same wavelength range of operating radio stations; to some extent eliminated by the use of receivers with a high level of tuning;

b) the interfering effect of radio stations of greater power, deliberately launched by the enemy on the wave that he wants to drown out;

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

• 7. Interception by the enemy. The spread 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) maximum, almost instantaneous, transmission rate;

• c) the possibility of simultaneous transmission and reception;

• d) the possibility of graphic transmission (diagrams, maps, letters, photos);

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

• f) automatic transmission and reception;

• g) secrecy and independence from interfering enemy actions.

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.