Boeing XB-39 Technical Specifications
Service Year: 1944
Type: Heavy Strategic Bomber Prototype Aircraft
National Origin: United States
Manufacturer(s): Boeing Company / Fisher (General Motors)
Production Total: 1
Structural (Crew Space, Dimensions and Weights)
Operating Crew (Typical): 10
Overall Length: 99.02 feet (30.18 meters)
Overall Width: 141.24 feet (43.05 meters)
Overall Height: 27.72 feet (8.45 meters)
Weight (Empty): 74,516 lb (33,800 kg)
Weight (MTOW): 133,512 lb (60,560 kg)
Installed Power and Standard Day Performance
Propulsion: 4 x Allison V-3420-11 W24 liquid-cooled engines developing 2,100 horsepower each.
Maximum Speed: 404 mph (650 kph; 351 knots)
Maximum Range: 6,251 miles (10,060 km)
Service Ceiling: 36,089 feet (11,000 meters; 6.84 miles)
Rate-of-Climb: 1,000 feet-per-minute (305 m/min)
Armament / Mission Payload
10 x 0.50 cal Browning M2 heavy machine guns in four remote-controlled turrets.
2 x 0.50 cal Browning M2 heavy machine guns and 1 x 20mm M2 cannon in tail unit.
Up to 20,000lb of conventional drop stores held internally.
Global Operators / Customers
United States (cancelled)
Model Variants (Including Prototypes)
XB-39 - Base Project Designation; single, flyable prototype completed.