Question

The air screw of an aeroplane is rotating clockwise when looking from the front. If it makes a left turn, the gyroscopic effect will

(a) tend to depress the nose and raise the tail

(b) tend to raise the nose and depress the tail

(c) tilt the aeroplane

(d) none of the mentioned

The question was posed to me in an online interview.

Origin of the question is Precessional Angular Motion in section Gyroscopic Couple and Precessional Motion of Machine Dynamics

Answer 1

Correct option is (b) tend to raise the nose and depress the tail

To elaborate: When the engine or propeller rotates in clockwise direction when viewed from the front and the aeroplane takes a left turn, then the effect of reactive gyroscopic couple will be to raise the tail and dip the nose of the aeroplane. When the aeroplane takes a right turn, the effect of reactive gyroscopic couple will be to raise the nose and dip the tail of the aeroplane.