Lockheed C-121 Constellation


1st Flight 1951

Crew: 5 (Pilot, Copilot, Navigator, Flight Engineer, Radio Operator)

Capacity: 47-106 Passengers

Length: 113 ft 7 in (34.62 m)

Wingspan: 123 ft (37 m)

Height: 24 ft 9 in (7.54 m)

Wing area: 1,650 sq ft (153 m2)

Airfoil: root: NACA 23018; tip: NACA 4412

Empty weight: 69,000 lb (31,298 kg)

Max takeoff weight: 120,000 lb (54,431 kg)

Powerplant: 4 × Wright R-3350 972-TC-18DA-1 Duplex-Cyclone 18-cylinder air-cooled radial piston engines, 3,250 hp (2,420 kW) each

Propellers: 3-bladed constant-speed feathering propellers


Maximum speed: 330 mph (530 km/h, 290 kn)

Cruise speed: 304 mph (489 km/h, 264 kn)

Range: 5,150 mi (8,290 km, 4,480 nmi)

Service ceiling: 25,700 ft (7,800 m)


The Lockheed C-121 Constellation is a military transport version of the Lockheed Constellation.

A total of 332 aircraft were constructed for both the United States Air Force and United States Navy for various purposes.



Manufacturer’s designation for the WV-2, WV-3 and RC-121D.


Manufacturer’s designation for the R7V-1, RC-121C and VC-121E.


Manufacturer’s designation for the C-121C with strengthened Landing Gear.

EC-121 College Eye

AEW&C aircraft used in the Vietnam War.

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