Primo prototipo di Dynosfera

The Dynosphere was invented Dr J H Purves in 1932. It differed from the other monowheel designs in that it was wide enough to stand up by itself, without the need for continuous balancing. The outside of the wheel was part of the surface of a sphere.

Se si potesse portare a 88MPH …

http://www.dself.dsl.pipex.com/museum/transport/motorwhl/motorwhl3.htm