Originally Posted by
Fl1ingfrog
I agree with the OddOne, study using the many quality teaching CDs and text books available. There are are too many poor teaching aids on the market which should be avoided. It is correct that all gyros exploit the principles of rigidity.
Yes to the first statement, but I respectfully disagree with the last sentence. For a gyroscope to be able to exploit the principle of rigidity, it needs to have three degrees of freedom. The gyro in a turn indicator has only one degree of freedom and is therefore unable to act as either an earth-reference gyro or a space-reference gyro.