Question

If the movement of the ship were to occur about a vertical plane about a parallel axis then which of the following factors will be affected while pitching?

(a) Upward pitch

(b) Downward pitch

(c) Pitching will not occur

(d) Change in angular velocity of rotor

This question was addressed to me in an interview.

My enquiry is from Effect of Gyroscopic Couple on a Navalship during Pitching & Rolling in chapter Gyroscopic Couple and Precessional Motion of Machine Dynamics

Answer 1

Right choice is (c) Pitching will not occur

Explanation: For pitching to occur, motion should be about a vertical plane about a Transverse axis, else the motion will not be considered pitching. If the movement is about the parallel axis then it is called Rolling.