The multi engine piston DC-3 series is a propeller -driven, fixed- wing American aircraft. The transport aircraft can carry 21 to 32 passengers with two crew members. The cruise speed is 130 kts (150 mph, 240 km/h) and the maximum speed is 206 kts (237 mph, 381 km/h). The empty weight is 18,300 lbs (8,300 kg) and the loaded weight is 25,200 lbs (11,400 kg).
The multi engine piston DC-4 is a propeller-driven, four-engine airliner. It seats up to 86 passengers with 4 crew members. The cruise speed is 227 mph (365 km/h) and the maximum speed is 280 mph (450 km/h). The DC-4 uses four Pratt & Whitney R-2000 radial engines. The empty weight of the aircraft is 43,300 lbs (19,640 kg) and the maximum takeoff weight is 73,000 lbs (33,100 kg).