Lockheed C-121 Constellation

C-121/R7O/R7V Constellation
A Military Air Transport Service C-121G Super Constellation flying near the Golden Gate Bridge.
Role	Military transport Type of aircraft
National origin	United States
Manufacturer	Lockheed Corporation
First flight	March 14, 1947
Introduction	November 12, 1948
Status	Retired from military service, two operated by civilian preservation organisations
Primary user	United States Air Force United States Navy
Produced	1947 to 1958
Number built	332
Developed from	L-749 Constellation L-1049 Super Constellation
Variants	R7V-2/YC-121F Constellation EC-121 Warning Star

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. Numerous airborne early warning versions were also constructed. The C-121 later saw service with smaller civilian operators until 1993.