Keystone LB-11

The Keystone LB-11 was the designation given to the second-to-last LB-6 while it was being used as an engine test-bed. At first the LB-11 was used to test the standard Wright R-1750-3 Cyclone, a very similar engine to the R-1750-1 used in the LB-6. It was then used to test geared Wright G1R-1750 radial engines, with a gear ratio of 2:1 and was given the designation LB-11A.

All three engines provided the same 525hp, and all three versions of the aircraft (LB-6, LB-11 and LB-11A) had very similar performance figures. At the end of the engine tests the LB-11A was turned back into a standard LB-6 by installing the original R-1750-1 engines, and returned to operational service.

 

LB-11 and LB-11A

Engine

Wright R-1750-3 Cyclones

Power

525hp

Crew

5

Span

75ft 0in

Length

49ft 3in

Height

18ft 1in

Gross Weight

13,000lb

Maximum Speed

115mph at sea level

Cruising Speed

95mph

Ceiling

11,650ft

Range

632 miles with full bomb load

Guns

Five 0.30in machine guns

Bomb load

2,000lb

Air War Index - Air War Links - Air War Books

How to cite this article: Rickard, J (8 October 2008), Keystone LB-11 , http://www.historyofwar.org/articles/weapons_keystone_LB-11.html

Help - F.A.Q. - Contact Us - Search - Recent - About Us -  Subscribe in a reader - Join our Google Group - Cookies