Sorry! Posting another strange sample exam question here that I cannot understand:
Q. The principle of rigidity is used for the operation of the following gyroscopic instruments:- Directional Gyro and Turn indicator.
- Directional Gyro and Artificial Horizon.
- Artificial Horizon and Turn indicator.
The answer provided is #2 - meaning that the Turn indicator does not use the principle of rigidity. How can that be? I know the turn
coordinator is just a ball in tube, but the turn
indicator is driven by a gyro, isn't it? And by definition a gyro-driven instrument works by exploiting rigidity? Am I missing something here?
Thanks