Compass (KI-13 k) RARE Soviet Magnetic Jet Fighter MiG-21 USSR Military Airforce
Compass (KI-13 k) RARE Soviet Magnetic Jet Fighter MiG-21 USSR Military Airforce:
MilitaryAviationMagnetic Compass (KI-13 k)Compassworking condition. Has traces of time, storage stains, scratches and chips.Aviation compass KI-13 k aircraft Magnetic compass KI-13 k is designed to determine the course of the aircraft. The plane's course is the angle between the North direction of the Meridian passing through the plane and the longitudinal axis of the plane.The magnetic compass KI-13 is designed to determine and maintain the compass heading of an aircraft, as well as to set the aircraft in a given direction after a turn.The principle of operation of the compass is based on the use of the property of a freely suspended magnet in the form of a rod to be installed in the cavity of the Earth's magnetic meridian. A magnetic compass is installed above the dashboard, along the longitudinal axis of the aircraft.
The KI-13 magnetic compass is a back-up directional device and is used by the aircraft crew if the GIK-1 gyro-induction compass fails. However, the crew of the aircraft is obliged to occasionally observe the readings of the KI-13 compass in flight, as it gives a general orientation about the course of the aircraft, and compare these readings with the readings of the GIK-1 compass for timely detection of its malfunction.
To eliminate semicircular deviation, within the range from 20 to 50 °, a deviation device is mounted at the bottom of the body. When eliminating the deviation of the compass, the rollers with the inscription "N-S", "B-3" are rotated, indicating the courses at which the semicircular deviation is eliminated. The readings are counted using a heading line attached to the inner face of the device. There is a membrane inside the body of the device, which serves to compensate for changes in the volume of liquid when the temperature changes.
The magnetic compass works as follows. In rectilinear horizontal flight, the rose is set to the plane of the magnetic meridian (in the North - South direction) and maintains a constant direction relative to the Earth. When the plane turns, the Earth's magnetic field keeps the card with the scale in a constant position, and the heading line associated with the device body rotates by the same angle as the plane, showing the value of the plane's angle of rotation.
The KI-13 compass works normally when the aircraft rolls up to 17 °, above - the compass rose touches the internal parts of the device, and it becomes inoperative.
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