Keystone

Keystone B-4

Heavy bomber

  • First flight1930
  • StatusRetired
  • Number built30
Technical data

Specifications

01

Crew & dimensions

Crew
5
Length
14.9 m (48 ft 10 in)
Wingspan
22.8 m (74 ft 8 in)
Height
4.8 m (15 ft 9 in)
02

Performance

Maximum speed
210 km/h (130 mph, 110 kn)
Range
1,400 km (850 mi, 760 nmi)
Service ceiling
4,300 m (14,000 ft)
03

Powerplant

Powerplant
2 × Pratt & Whitney R-1860-7 radial engines (575 hp / 429 kW / shp / lbf / kN)
04

Armament

Armament
Guns: 3 ×.30 in (7.62 mm) Browning machine guns; Bombs: 2,500 lb (1,100 kg); 4,000 lb (1,800 kg) on short runs

Engines 1

R-1860 R-1860 Piston engines Pratt & Whitney R-1860 Hornet B Development of the Hornet radial engine. Pratt & Whitney · United States→