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Keystone B-5
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<!-- This article is a part of [[Wikipedia:WikiProject Aircraft]]. Please see [[Wikipedia:WikiProject Aircraft/page content]] for recommended layout. --> {{Infobox aircraft |name=B-5 |image=Keystone B-5A front left quarter 060421-F-1234P-017.jpg |caption=Keystone B-5A |type=[[Light bomber]] |manufacturer=[[Keystone Aircraft]] |designer= |first_flight= |introduction= |retired= |status= |primary_user=[[United States Army Air Corps]] |more_users= |produced= |number_built= 3 Y1B-5<br />27 B-5A |unit cost= |developed_from=[[Keystone B-3]] |variants= }} The '''Keystone''' B-5 is a light bomber made by the [[Keystone Aircraft]] company for the [[United States Army Air Corps]] in the early 1930s. The B-5A was a Keystone B-3A with Wright Cyclone rather than Pratt & Whitney engines. ==Design and development== Three B-3A (LB-10A) were reengined with [[Wright R-1750-3]] radial engines and were redesignated Y1B-5. The Army Air Corps changed the design of the last 27 LB-10As on order, replacing the [[Pratt & Whitney R-1690]] radial engines with the Wright R-1750-3. The Pratt & Whitney-powered aircraft were designated B-3A, and the Wright-powered aircraft became B-5A. They provided the backbone of the U.S. bomber force from then to [[1934 in aviation|1934]]. ==Operational history== B-5A were first line bombers of the United States for the period between 1930 and 1934. Afterwards, they remained in service primarily as observation aircraft until the early 1940s. ==Variants== ;LB-14 :Designed as [[Keystone B-3|LB-10]] with 575 hp (429 kW) [[Pratt & Whitney GR-1860]] engines; three ordered, but redesigned with 525 hp (392 kW) Wright R-1750-3 engines and delivered as the '''Y1B-5'''. ;Y1B-5 :Three pre-production aircraft redesignated from LB-14 before delivery. ;B-5A :Wright R-1750-3 version originally ordered as B-3A, 27 built ==Operators== ;{{flag|United States|1912}} *[[United States Army Air Corps]] ==Specifications (B-5A)== {{Aircraft specs |prime units?=imp |ref= |crew=5 |length ft=48 |length in=10 |length m=14.9 |span ft=74 |span in=8 |span m=22.8 |height ft=15 |height in=9 |height m=4.8 |wing area sqft=1145 |wing area sqm=106.4 |empty weight lb=7705 |empty weight kg=3945 |gross weight lb=12952 |gross weight kg=5875 |eng1 number=2 |eng1 name=[[Wright R-1750]]-3 |eng1 type=[[radial engine]]s |eng1 hp=525 |eng1 kw=392 |max speed mph=111 |max speed kts=97 |max speed kmh=179 |cruise speed mph=98 |cruise speed kts=86 |cruise speed kmh=160 |range miles=815 |range nmi=707 |range km=1,310 |ceiling ft=14,000 |ceiling m=4,270 |wing loading lb/sqft=273.3 |wing loading kg/m2=52.22 |power/mass=0.0810 hp/lb (133 W/kg) |guns=3 Γ .30 in (7.62 mm) [[Browning Arms Company|Browning]] [[machine gun]]s |bombs=2,500 lb (1,100 kg); 4,000 lb (1,800 kg) on short runs }} ==See also== {{aircontent |related= * [[Keystone B-3]] * [[Keystone B-4]] * [[Keystone B-6]] |similar aircraft= |sequence= |lists= * [[List of bomber aircraft]] * [[List of military aircraft of the United States]] }} ==External links== {{commons category|Keystone B-5}} *[https://web.archive.org/web/20040804112845/http://www.wpafb.af.mil/museum/research/bombers/b1-47.htm USAF Museum article on B-5] *[https://web.archive.org/web/20040804090325/http://www.wpafb.af.mil/museum/research/bombers/b1-34.htm USAF Museum article on LB-14] {{Keystone aircraft}} {{USAF bomber aircraft}} [[Category:Keystone aircraft|B-5]] [[Category:Light bombers]] [[Category:1930s United States bomber aircraft|Keystone B-05]] [[Category:Biplanes]] [[Category:Twin piston-engined tractor aircraft]]
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