Data from Encyclopedia of U.S. Air Force Aircraft and Missile Systems: Volume II: Post-World War II Bombers, 1945–1973
General characteristics
Crew: 8 to 10: Pilot, co-pilot, bombardier, navigator, flight engineer, radio/electronic countermeasures operator, two side gunners, top gunner and tail gunner
Length: 99 ft 0 in (30.18 m)
Wingspan: 141 ft 3 in (43.05 m)
Height: 32 ft 8 in (9.96 m)
Wing area: 1,720 sq ft (160 m²)
Empty weight: 84,714 lb (38,426 kg)
Gross weight: 121,850 lb (55,270 kg)
Max takeoff weight: 173,000 lb (78,471 kg) (max overload weight)
Powerplant: 4 × Pratt & Whitney R-4360-35 28 Cyl.
four-row air-cooled radial piston engine, 3,500 hp (2,600 kW)  each
Powerplant: 2 × General Electric J47-GE-23 Turbojet, 5,200 lbf (23 kN) thrust each (auxiliary engines in KB-50J tanker only)
Performance
Maximum speed: 394 mph (634 km/h, 342 kn) at 30,000 ft (9,150 m)
Cruise speed: 244 mph (393 km/h, 212 kn)
Combat range: 2,394 mi (3,853 km, 2,080 nmi)
Ferry range: 7,750 mi (12,470 km, 6,730 nmi)
Service ceiling: 36,900 ft (11,200 m)
Rate of climb: 2,200 ft/min (11 m/s)
Wing loading: 70.19 lb/sq ft (342.7 kg/m²)
Power/mass: 0.115 hp/lb (8.696 lbs/hp)
Armament
Guns: 
13× .50 in (12.7 mm) M2 Browning machine guns in 4 × remote controlled and manned tail turret
Bombs: 
20,000 lb (9,100 kg) internally
8,000 lb (3,600 kg) on external hardpoints
Data from Encyclopedia of U.S. Air Force Aircraft and Missile Systems: Volume II: Post-World War II Bombers, 1945–1973
General characteristics
Crew: 8 to 10: Pilot, co-pilot, bombardier, navigator, flight engineer, radio/electronic countermeasures operator, two side gunners, top gunner and tail gunner
Length: 99 ft 0 in (30.18 m)
Wingspan: 141 ft 3 in (43.05 m)
Height: 32 ft 8 in (9.96 m)
Wing area: 1,720 sq ft (160 m²)
Empty weight: 84,714 lb (38,426 kg)
Gross weight: 121,850 lb (55,270 kg)
Max takeoff weight: 173,000 lb (78,471 kg) (max overload weight)
Powerplant: 4 × Pratt & Whitney R-4360-35 28 Cyl. four-row air-cooled radial piston engine, 3,500 hp (2,600 kW)  each
Powerplant: 2 × General Electric J47-GE-23 Turbojet, 5,200 lbf (23 kN) thrust each (auxiliary engines in KB-50J tanker only)
Performance
Maximum speed: 394 mph (634 km/h, 342 kn) at 30,000 ft (9,150 m)
Cruise speed: 244 mph (393 km/h, 212 kn)
Combat range: 2,394 mi (3,853 km, 2,080 nmi)
Ferry range: 7,750 mi (12,470 km, 6,730 nmi)
Service ceiling: 36,900 ft (11,200 m)
Rate of climb: 2,200 ft/min (11 m/s)
Wing loading: 70.19 lb/sq ft (342.7 kg/m²)
Power/mass: 0.115 hp/lb (8.696 lbs/hp)
Armament
Guns: 
13× .50 in (12.7 mm) M2 Browning machine guns in 4 × remote controlled and manned tail turret
Bombs: 
20,000 lb (9,100 kg) internally
8,000 lb (3,600 kg) on external hardpoints
Boeing B-50 Superfortress