Some manufacturers have concluded that aerobatics or g loads associated with aerobatic operations do not significantly impair or shorten the life of the operating gyroscope as long as they are free or unlocked during these operations. Locking the gyroscope in the holding position during these operations may damage the rotating bearing and/or the universal bearing because of the large angular momentum of the rotating mass and the resulting orthogonal force. The best method is to free the gyroscope during aerobatics and, if necessary, use the lock to reset the gyroscope during straight and horizontal flight.
Directional Gyro: The directional gyroscope has a locking function that quickly erects the rotor on a horizontal plane and aligns the heading card with the magnetic compass. During the aerobatics, the course card may begin to rotate. If this happens, the pilot should pull the lock knob to stop the rotation. Once he returns to a straight line and flies horizontally, he should pull the lock knob and align the title card with his magnetic compass.
Horizo n gyroscope without locking: Standard horizontal gyroscopes without locking function have 360 degrees of rolling freedom and approximately +/- or -85 degrees of freedom. Controlled precession is used to maintain erection and correct pitch and roll information during a full cycle. During most aerobatic operations, the Horizo n Gyro will maintain its erection [the axis of rotation is aligned with the dynamic vertical] and provide the correct pitch and roll reference. However, some operations may of course cause Horizo n Gyro to lose vertical reference and even "rotate". The only problem with this situation is that it may take a few minutes [10 to 20] of straight and horizontal flight before the Horizo n Gyro is fully erected, and provides useful pitch and roll information.
Horizo n gyroscope with locking function: By adding a lock to Horizo n Gyro, if the gyroscope rolls during aerobatics, the pilot can return to the straight and horizontal flight [* using the Earth's horizon as a reference] and pull Lock the knob to immediately align the gyroscope rotor with a vertical reference. The gyroscope indication may deviate by a few degrees depending on how much the pilot is aligning the aircraft with the horizontal flight during the flight, but the pilot will have useful pitch and roll information and the internal mounting system will correct the small error of 2 or 3 minutes. .
*Aerobatics exercises should only be carried out during the VFR flight and have a clear Earth horizon as a reference.
Orignal From: Effects of stunt exercises on gyroscopes
No comments:
Post a Comment