Subject: Bomber Series--Keystone LB-11

From: [email-masked]
Date: 13 Jun 94 16:56:12 GMT

>From [email-masked]

The 16th production Keystone LB-6 on the 1929 contract (29-026) was 
completed as the LB-11.  The LB-11 differed from the LB-6 in being 
powered by by a pair of experimental 525 hp Wright R-1750-3 Cyclone 
radial engines.  

In 1930, the LB-11 became the LB-11A when it was fitted with geared 
G1R-1750 Cyclones.  The LB-11/11A was purely experimental, and did
not lead to a production order.

Specification of the Keystone LB-11: 

Two 525 hp Wright R-1750-3 Cyclone alr-cooled radial engines.  Maximum 
speed 115 mph at sea level Weight: 13,000 pounds gross.  Wingspan 75 
feet, length 49 feet 3 inches, height 15 feet 6 inches, wing area 1148 
square feet.  Two Lewis machine guns in an open gunner's position in 
the nose, two Lewis machine guns in an open dorsal gunner's position, 
one Lewis gun firing downward through an opening in the lower 
fuselage.  

Sources:

  United States Military Aircraft Since 1909, Gordon Swanborough and
  Peter M. Bowers, Smithsonian, 1989.

  American Combat Planes, Ray Wagner, Third Edition, Doubleday, 1982.

  American Warplanes, Bill Gunston

  Jane's Encyclopedia of Aviation

  U.S. Army Aircraft, 1908-1946, James C. Fahey

Joe Baugher				AT&T Bell Laboratories
1000 E. Warrenville Road		Naperville, Illinois 60566-7013