General characteristics
Crew: 10
Length: 74 ft 0 in (22.56 m)
Wingspan: 103 ft 11 in (31.67 m)
Height: 19 ft 2 in (5.84 m)
Wing area: 1,420 ft² (131.9 m²)
Empty weight: 34,750 lb (15,762 kg)
Loaded weight: 56,000 lb (25,401 kg)
Max. takeoff weight: 64,000 lb (29,030 kg)
Powerplant: 4 × Allison V-1710-97 turbosupercharged liquid-cooled V12 engines, 1,425 hp (1,063 kW) each
Performance
Maximum speed: 327 mph (284 knots, 526 km/h)
Cruise speed: 226 mph (197 knots, 364 km/h)
Range: 3,300 mi (2,870 nmi, 5,310 km)
Service ceiling: 29,600 ft (9,020 m)
The work for this project was handed over to Lockheed’s Vega subsidiary who were already building B-17’s at the time. When the prototype flew it showed improved performance over the standard radial engines. The B-38 was 40mph an hour faster then the standard B-17.