Grab a bicycle wheel by the ends of the axle, and have someone spin it (they'd be lucky to get 5mph surface speed at tire) and then try to abruptly change the spin axis. There are other factors at work as well, I'm sure, but gyro affects are not negligible.

Put a bicycle wheel on a kayak (attached to the deck) spinning in a horizontal plane, and it will dampen the affects of small waves or minor paddler jitters. Put two wheels with extra heavy rims, and it'll become quite noticeable. Now we have another use for our onboard electricity!

> You should read "Bicycling Science" by Witt and Wilson.
> > gyroscopic effects do not affect stability of bicycles.