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 triangular rotary piston engine avoids reciprocating parts. 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. The lamp requires 2 x AA Batteries which are not included. Solidly constructed out of aluminium and plastic and the model is mounted on a base. A placard on the base labels all key components. Model Dimensions: 203mm x 178mm x 89mm. Base Dimensions: 203mm x 203mm x 63mm base. AA Batteries are available to purchase separately (B8R05078).