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Posted 6/25/2009 Printable Fact Sheet
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Keystone LB-7
Keystone LB-7. (U.S. Air Force photo)
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The Keystone LB-7 was an LB-6 with different engines. The initial production LB-7 (S/N 29-388) was designated XLB-7 while undergoing prototype testing. It was later redesignated LB-7. Keystone named the aircraft Panther (the LB-6 was also named Panther), but the name was not adopted by the Army Air Corps.

Three LB-6 aircraft were re-engined late in their service lives to become LB-7s. One LB-7 was modified to become the XLB-8, and another became the XLB-9 after an engine change and a final modification resulted in the XLB-12.

Type Number built/
LB-7 18 Production XLB-7

Armament: Five .30-cal. machine guns and 2,000 pounds of bombs
Engines: Two Pratt & Whitney R-1690-3 radials of 525 hp each
Top speed: 114 mph at sea level
Cruising speed: 95 mph
Service ceiling: 11,650 ft.
Range: 632 miles with full bomb load
Span: 75 ft. 0 in.
Length: 49 ft. 3 in.
Height: 18 ft. 1 in.
Weight: 13,070 lbs. gross
Crew: Five
Serial numbers: 28-388 to 28-395, 29-1 to 29-10 (Note: Three LB-6s were re-engined to the LB-7 configuration [29-13, 14, and 16]. LB-7 29-9 became the XLB-8. LB-7 29-10 became the XLB-9. LB-7 28-388 became the XLB-12.)

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