Stuff You Can Buy
Other Stuff

Pratt & Whitney R-1690 Hornet A

The Engine Specifications
Coming 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)
Models Used by
Hornet A: 525 hp (391 kW)
R-1690-11: 700 hp (521 kW)
R-1690-13: 625 hp (465 kW)
R-1690-52: 750 hp (559 kW)
Boeing 80A
Douglas O-38
Martin B-12
Sikorsky S-43
Related Pages
More about Pratt & Whitney

page updated 01 September 2007  



Use of photographs | References  | Disclaimer | Privacy


Apple iTunes

free counters


Kenneth W Shanaberger 2000 - 2010