Pratt & Whitney R-2180-E Twin Wasp E

The Pratt & Whitney R-2180-E Twin Wasp E was a radial aero engine developed in the United States by Pratt & Whitney. It had two rows of seven cylinders each. Its only production application was on the post-Second World War Saab 90 Scandia airliner.

Design and development
The R-2180-E is effectively a fourteen-cylinder simplification of the twenty-eight cylinder R-4360 Wasp Major engine; its cylinders are the same size and displacement as the Wasp Major.

Applications

 * Piasecki YH-16A
 * Saab 90 Scandia