The electric turn signal is designed to provide information on the correct execution of both horizontal flight and the rotation of the aircraft around a vertical axis with a transverse roll to 45 º at a flight speed of 500 km / h.
ЭУП-53 includes two separate devices, housed in one housing: a turn indicator and a sliding indicator.
The electric indicator of turn of type ЭУП-53 is intended for definition of a direction of a turn of the plane. The rotation indicator uses the property of a gyroscope with two degrees of freedom to combine the axis of free rotation with the axis of forced rotation.
Basic technical data.
DC supply voltage, V _____________ 27 ± 2,7
Range of work on height, km ________________________ to 20
Temperature range of operation, ° С ____________________ -60 to +50
Deviation of the arrow of the device with a flat turn, deg:
With an angular velocity of 0.6 deg / s ________________________ 4 ± 2
At a speed of 1.5 deg / s ______________________________ 12 ± 2
Accuracy (deg) under normal conditions at heels of 15-45 ° and angular velocity of turn 1.1-4 degrees / s _________________________________________ + 1.5
If the aircraft makes a turn around its vertical axis, the gyroscope, reacting to the turn speed, precesses until the moment of the spring balances the gyroscopic moment. By deviation of the arrow of the device, you can judge the direction of the turn, and in combination with the slip indicator it is convenient to monitor the performance of a coordinated turn. In addition, EUP-53, together with a sliding indicator and a vario meter in emergency cases, can to some extent replace the air horizon, since the indications of these instruments help to determine the position of the aircraft relative to the horizon plane.