Pratt & Whitney R-2180-A Twin Hornet

The Pratt & Whitney R-2180-A Twin Hornet was a radial engine developed in the United States by Pratt & Whitney. It had two rows of seven cylinders each.

Applications

 * Douglas DC-4E
 * North American XB-21
 * Republic P-44 Rocket
 * Stearman XA-21