The instrument is set so that the gyroscope axes u-u and v-v coincide with axes z-z and x-x of the airplane. When the airplane turns about axis x-x or z-z, hand 1 remains stationary because spring 2, secured to the frame of the instrument, sets axis u-u of gyroscope rotor 3 parallel to axis z-z. Spring 2 develops a counterbalancing moment, directed oppositely, with respect to axis v-v. The turn indicator shows right or left turns of the airplane. Damper 5 serves to damp the oscillations of hand 1.
$824$LW,M$