Lockheed C-121 Constellation

C-121/R7O/R7V
Constellation
A MATS C-121G Super Constellation flying near the Golden Gate Bridge.
A Military Air Transport Service C-121G Super Constellation flying near the Golden Gate Bridge.
Role Military transport
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.