Douglas C-54/DC-4
Crew: 2
Payload: 18,000 lbs
Length: 93 ft 10 in
Height: 27 ft 6 in
Wingspan: 117 ft 6 in
Max Takeoff Weight: 71,000 lbs
Cruise Speed: 190 mph
Range: 2,500 nm (max payload)
Powerplant: 4× Pratt & Whitney R-2000 radial engine, 1,450 hp (1,081 kW) each

Douglas DC-6A
Crew: 3
Payload: 28,000 lbs
Length: 105 ft 7 in
Height: 28 ft 5 in
Wingspan: 117 ft 6 in
Max Takeoff Weight: 100,000 lbs
Cruise Speed: 250 mph
Range: 2,948 nm (max payload)
Powerplant: 4x Pratt & Whitney R-2800-CB16 Double Wasp radial engine, 2,400 hp (1,800 kW) each