Keystone B-5

Keystone B-5

Description
Role	Light bomber
Crew	5
First Flight
Entered Service	1930
Manufacturer	Keystone Aircraft Corporation
Number built	3 Y1B-5, 27 B-5A
Dimensions
Length	48 ft 10 in	14.9 m
Wingspan	74 ft 8 in	22.7 m
Height	15 ft 9 in	4.8 m
Wing area	ft²	m²
Weights
Empty	lb	kg
Loaded	12,952 lb	5,875 kg
Maximum takeoff	lb	kg
Capacity
Powerplant
Engines	Wright R-1750-3 radials (2)
Power	525 hp	392 kW
Performance
Maximum speed (sea level)	111 mph	178.6 km/h
Cruising speed	98mph	157.7km/h
Combat range	815 miles	1,311 km
Ferry range	miles	km
Service ceiling	14,000 ft	4,267 m
Rate of climb	ft/min	m/min
Wing loading	lb/ft²	kg/m²
Power/Mass	.081 hp/lb	.133 kW/kg
Armament
Guns	Browning .30-calibre machine guns (3)
Bombs	2,500lb

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Up until 1930, 'Light bomber' planes were given the designation LB-. At that time the LB- designation was dropped, and the LB-14 was renamed the B-5. The three LB-14s produced for the US Army were re-engined and redesignated Y1B-5s. The design and performance of the Y1B-5 was very similar to the B-3A (LB-10), the only significant difference being the engine. (The Y1B- designation indicates that funds came from outside normal annual funds.)

In 1930, twenty-seven B-3As were convereted to the B-5A design. They provided the backbone of the U.S. bomber force from 1930 to 1934.

Links

USAF Museum article on Y1B-5 (http://www.wpafb.af.mil/museum/research/bombers/b1-46.htm)
USAF Museum article on B-5A (http://www.wpafb.af.mil/museum/research/bombers/b1-47.htm)
USAF Museum article on LB-14 (http://www.wpafb.af.mil/museum/research/bombers/b1-34.htm)

Related content
Related Development	Keystone LB-10 - Keystone LB-14
Similar Aircraft
Designation Series	B-2 - B-3 - B-4 - B-5 - B-6 - Y1B-7 - XB-8
Related Lists	List of military aircraft of the United States - List of bomber aircraft

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