close on the heels of its Wasp radial engine, Pratt & Whitney
developed a larger version named the Hornet A. The U.S.
Military designated the engine the R-1690.
First flown in 1927, the U.S. Navy wanted the
Hornet as a replacement for the heavy Packard engines in its torpedo
and bomber aircraft. The result was so dramatic, the Navy
announced it would cease buying water-cooled engines.
|9 cylinder, air-cooled, radial|
|displacement: 1,690 cubic inches (27.7 liters)|