Keystone B-5
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| B-5 | |
|---|---|
 Keystone B-5A |
|
| Type | Light bomber |
| Manufacturer | Keystone |
| Primary user | United States Army Air Corps |
| Number built | 3 Y1B-5 27 B-5A |
| Developed from | Keystone B-3 |
The Keystone B-5 was a light bomber made 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.
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[edit] Design and development
Three B-3A (LB-10A) were reengined with Wright R-1750-3 radial engines and were redesignated Y1B-5. The U.S. 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.
[edit] Operational history
B-5A were first line bombers of the United States for the period between 1930 and 1934. Later remained in service until the early 1940s serving primarily as observation aircraft.
[edit] Variants
- LB-14
- As LB-10 with 575hp (429kW) GR-1860 engines but delivered as the Y1B-5.
- Y1B-5
- Three pre-production aircraft redesignated from LB-14 before delivery.
- B-5A
- Wright R-1750-3 version of B-3A, 27 built
[edit] Operators
[edit] Specifications (B-5A)
General characteristics
- Crew: 5
- Length: 48 ft 10 in (14.9 m)
- Wingspan: 74 ft 8 in (22.8 m)
- Height: 15 ft 9 in (4.8 m)
- Wing area: 1,145 ft² (106.4 m²)
- Empty weight: 7,705 lb (3,945 kg)
- Loaded weight: 12,952 lb (5,875 kg)
- Max takeoff weight: lb (kg)
- Powerplant: 2× Wright R-1750-3 radial engines, 525 hp (392 kW) each
Performance
- Maximum speed: 111 mph (97 kt, 179 km/h)
- Cruise speed: 98 mph (86 kt, 160 km/h)
- Range: 815 mi (707 nm, 1,310 km)
- Service ceiling 14,000 ft (4,270 m)
- Wing loading: 273.3 lb/f² (52.22 kg/m²)
- Power/mass: 0.0810 hp/lb (133 W/kg)
Armament
- Guns: 3× .30-calibre (7.62 mm) Browning machine guns
- Bombs: 2,500 lb (1,100 kg); 4,000 lb (1,800 kg) on short runs
[edit] External links
[edit] See also
Related development
Related lists
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