Check the listing for details. Wankel Rotary Engine Model. Condition: New. Listed at 144.99 USD. Wankel Rotary Engine Model Hand poweredDemonstrates motion of the Wankel engineGreat gift for the car enthusiast EISCO Wankel Engine Model, Hand powered This model shows the internal structure and operating principles of a Wankel engine. This model is cut away to show the internal constructional details. Unlike other engines, the rotary piston engine avoids reciprocating parts. The power piston is an arch like triangular rotor which upon rotation, generates an epitrechoid. . Hand powered motion supplied through a crank demonstrates the moving parts of the engine as a hand crank is rotated. A simulated spark plug uses a small lamp to indicate the firing point. Solidly constructed out of aluminum and plastic. This large model measures 8 x 7 x 3.5 inches and is mounted on an 8 x 8 x 2.5 inch base. A placard on the base labels all key components. Perfect for classroom demonstration or as a gift for the car enthusiast executive. Lamp requires 2 AA batteries (not included). Product Details Brand Eisco Product Type MPN PH0496 Check out my other items.