https://en.wikipedia.org/wiki/Douglas_Y1B-7

General characteristics

• Length: 45 ft 11 in (14.00 m)
• Wingspan: 65 ft (20 m)
• Height: 11 ft 7 in (3.53 m)
• Wing area: 621.2 sq ft (57.71 m²)
• Empty weight: 5,519 lb (2,503 kg)
• Gross weight: 9,953 lb (4,515 kg)
• Max takeoff weight: 11,177 lb (5,070 kg)
• Powerplant: 2 × Curtiss V-1570-53 Conqueror V-12 liquid-cooled piston engines, 675 hp (503 kW) each
• Propellers: 3-bladed metal propellers

Performance

• Maximum speed: 182 mph (293 km/h; 158 kn)
• Cruise speed: 158 mph (254 km/h; 137 kn)
• Range: 411 mi (357 nmi; 661 km)
• Ferry range: 632 mi (549 nmi; 1,017 km)
• Service ceiling: 20,400 ft (6,200 m)
• Time to altitude: 10,000 ft (3,000 m) in 8 minutes 42 seconds
• Wing loading: 16 lb/sq ft (78 kg/m²)
• Power/mass: 0.135 hp/lb (0.222 kW/kg)

Armament

• Guns: 2 × 0.30 in (7.6 mm) machine guns
• Bombs: 1,200 lb (540 kg) of bombs carried beneath the fuselage