Hugh,


Although I did study physics to quite a high level, I prefer to explain thing in words that a layman would understand.

The equation in the Wiki link is quite comprehensive, but people who are not scientifically orientated, will only become disorientated from trying to comprehend it...

I am sure Barry will concur about the use of the gyroscopic precession effect and how it is used to allow the pilot to control his helicopter.

...Or more importantly for this thread; how a propeller with a large amount of inertia can adversely alter the course of a model, in a maneuver, due to its gyroscopic precession.