I spent a LOT of time working with gyros in the Air Force- - - -compasses and autopilot systems use them a lot. Getting a 16-lb. chunk of metal spinning at 20,000 RPM is interesting, particularly when one gets into gimbal lock and sends the rotor out through the side of the housing to bounce around inside the airplane!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!