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The L-21 was a U.S. Army Korean war era light liaison aircraft that later was used by the USAF. Prototypes were delivered in 1951 (as the YL-21) with the L-21A produced starting in 1952. The L-21B was redesignated as the U-7A in 1962.

The L-21 is a single engine, high-wing, 2-seater aircraft, based on the Piper PA-18, often used for agricultural purposes in the civilian market. The U.S. Air Force used the PA-18 in civil markings for contract training at civilian schools.

Piper L-21A Super Cub at the Texas Military Forces Museum, Camp Mabry, TX, 3 February 2006.  Photo courtesy of Bob Pettit
Piper L-21A Super Cub at the Texas Military Forces Museum, Camp Mabry, TX, 3 February 2006. Photo courtesy of Bob Pettit.

Today in WW II: 3 Aug 1941 Homefront: Thirteen states on the US eastern seaboard start voluntary gasoline sales curfew from 7PM to 7AM; gasoline consumption did not decrease.  More 
3 Aug 1943 Red Army launches Belgorod-Kharkov Strategic Offensive Operation [Aug 3-23], forcing German retreat across Dnepr River.
Visit the Olive-Drab.com World War II Timeline for day-by-day events 1939-1945! See also WW2 Books.

Piper L-21 Super Cub

Wingspan 35 ft. 3 in.
Length 22 ft. 7 in.
Engine 125hp Lycoming O-290
Max speed 125 mph.
Service ceiling 21,650 feet
Range 770 miles
Load 630 lbs.

Piper L-21 Super Cub with U.S. Army markings
Piper L-21 Super Cub with U.S. Army markings.

Piper L-21A Super Cub at the Texas Military Forces Museum, Camp Mabry, TX, 3 February 2006.  Photo courtesy of Bob Pettit
Piper L-21A Super Cub at the Texas Military Forces Museum, Camp Mabry, TX, 3 February 2006. Photo courtesy of Bob Pettit.