Aircraft Aneroid Barometer Barograph USSR Air Pressure Recording

Barograph-high-altitude recorder AD-2 is a recorder, designed to record the height of the aircraft climb during his flight.The device provides continuous recording of the aircraft flight altitude in the range from 0 to 7000 meters at an air temperature in the aircraft in the range of -35º + 45ºC.Duration of one drum revolution clockwork 2.4 and 6 o'clock. The principle of operation of the barograph-altitude recorder is based on the property of the membrane barometric box to deform from changes in atmospheric pressure. Made at the Riga plant of the USSR . It was used in the An-2, Yak-12, Ka-15 (18), Mi-2 aircraft. Untested. Sold as is.