Subject: Bomber Series--Keystone LB-12

From: [email-masked] (joseph.f.baugher)
Date: 16 Jun 94 22:38:44 GMT

The first production Keystone LB-7 (28-388) was converted to LB-12 by 
the replacement of the Pratt and Whitney R-1690-3 radials by a pair of 
direct drive 575 hp Pratt & Whitney R-1860-1 radial engines.  Only one 
example was built.  

Specification of the Keystone LB-12: 

Two 575 hp Pratt & Whitney R-1860-1 air-cooled radial engines.  
Maximum speed 116 mph at sea level Weight: 13,050 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		*  "Round up the usual suspects."    *
1000 E. Warrenville Road	**************************************
P. O. Box 3013
Naperville, Illinois 60566-7013		
(708) 713 4548				
uscbu!jfb                     Who, me?  Speak for AT&T?  Surely you jest!	
[email-masked]