The World's Weirdest Rotary Engine Is A 118-Year-Old French Spinner That Leaks Castor Oil Everywhere

In the early days of engine building, a pre-Wankel rotary engine powered thousands of aircraft. One of several problems: It ...
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Gnome-Rhone Mistral Major 14N, Radial 14 Engine

Bore and Stroke: 146 mm (5.8 in.) x 165 mm (6.5 in.) Following World War I, French Gnome-Rhone ended its production of rotary engines, and began building radial engines under license from English ...