Girl Riding Experimental Dynasphere Unicycle

1931

This striking sepia‑toned image captures a young woman at the controls of an experimental Dynasphere—a large, single‑wheel vehicle designed to enclose rider and engine within its rotating rim. Set against the rolling lawns of Norfolk, the photograph showcases early 20th‑century ingenuity in personal transport, where inventors sought novel solutions to mobility beyond the conventional bicycle or motorcar.

Historical Context
Invented around 1930 by British engineer J. E. Poulson, the Dynasphere represents the spirit of interwar technological enthusiasm. With its petrol engine mounted inside the wheel’s hub, the device promised compactness and a smooth ride—though stability and steering proved challenging in practice. Such monowheel contraptions were often demonstrated at county fairs and seaside resorts like Great Yarmouth to astonish the public and attract investment.

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