Hmm, does it matter at all that the book says, that a spinning rotor is "like" a gyro (as opposed to "is" a gyro) and the effect is "approximately" 90° later (as opposed to "is" 90° later)?
I mean, it sounds to me like they are just making a comparison, not literally saying a spinning rotor is a gyroscope.
,...unless you expert physicists are saying that a spinning rotor has absolutely nothing in common with a gyroscope? Is that it,...'cause this thread is hard to follow for us average joes?