| Manufacturer |
Keystone Aircraft Corporation |
| Description |
The Keystone B-4 was a biplane bomber, built by the Keystone Aircraft company for the United States Army Air Corps. |
| Designer |
Keystone Aircraft Corporation |
| Type |
Light bomber |
| Length (m) |
14.9 |
| Height (m) |
4.8 |
| Cockpit Crew |
5 |
| Max Speed (km/h) |
210 |
| Cruise Speed (km/h) |
167 |
| Max Ceiling (m) |
4300 |
| Rate of Climb (m/s) |
30 |
| Armament |
3 × .30 in (7.62 mm) Browning machine guns; 2,500 lb (1,100 kg); 4,000 lb (1,800 kg) on short runs |
| Number Built |
5 |
| Powerplant Description |
2 × Pratt & Whitney R-1860-7 radial engines, 429 kW (575 hp) each |
| Primary Users |
United States Army Air Corps |
| Status |
Retired |
| Wikipedia Article (URL) |
en.wikipedia.org/wiki/Keystone_B-4 |
| Flat Wing Span (m) |
22.8 |
| Flat Wing Area (m²) |
106.4 |
| Number of Engines |
2 |