WANKEL ENGINE (0195) This sectional model shows the internal structure in detail and demonstrates its basic principle operation. Unlike other engines, this engine incorporates rotary piston arrangements, completely eliminating reciprocating parts. The power piston is an arch shaped triangular rotor, which on rotating through a crank handle at the rear generates an epitrechoid. Ignition simulated by means of a miniature bulb. Mounted on base, with key and printed diagram showing working Qty :