General characteristics
Crew: two
Capacity: 21–32 passengers
Length: 64 ft 8 in (19.7 m)
Wingspan: 95 ft 2 in (29.0 m)
Height: 16 ft 11 in (5.16 m)
Wing area: 987 sq ft (91.7 m2)
Empty weight: 16,865 lb (7,650 kg)
Gross weight: 25,199 lb (11,430 kg)
Cargo weight: ca 4000kg
Fuel capacity: 822 gal. (3736 l)
Powerplant: 2 × Wright R-1820 Cyclone 9-cyl. air-cooled radial piston engine, 1,100 hp (820 kW) each
Powerplant: 2 × Pratt & Whitney R-1830-S1C3G Twin Wasp 14-cyl. air-cooled two row radial piston engine, 1,200 hp (890 kW) each
Propellers: 3-bladed Hamilton Standard 23E50 series, 11.5 ft (3.5 m) diameter
Performance
Maximum speed: 200 kn; 370 km/h (230 mph) at 8,500 ft (2,590 m)
Cruise speed: 180 kn; 333 km/h (207 mph)
Stall speed: 58.2 kn (67 mph; 108 km/h)
Service ceiling: 23,200 ft (7,100 m)
Rate of climb: 1,130 ft/min (5.7 m/s)
Wing loading: 25.5 lb/sq ft (125 kg/m2)
Power/mass: 0.0952 hp/lb (156.5 W/kg)
Some modifications have been made to the aircraft of the Starkweather-Moore Expedition, as follows: retractable ski landing gear, oxygen breathing apparatus, extra radio equipment, gyrocompass, radio direction finder, artificial horizon, an eight-gallon fresh water tank, extra fuel tanks, lightweight folding seats, wider doors (to fit cargo and fuel drums). motion picture camera rack and optically flat window. and electric engine heaters.
