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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: 28 Jul 1941 Oil agreement between Japan and Dutch East Indies suspended, part of a general order freezing all Japanese assets, pushing Japan toward war.  More 
28 Jul 1941 Soviet Union agreement with London-based Polish Government-in-exile invalidates the border negotiated with Germany and enlists Poles detained in the USSR for Allied armies.
28 Jul 1942 6000 Jews brought to pits by German SS and shot dead in Minsk, Belarus, a total of 30,000 slaughtered over four days of the Great Pogrom [28-31 Jul].
28 Jul 1944 Rapid Red Army advance through Poland overruns German defenses and captures Brest-Litovsk, Jaroslaw and Przemysl.
28 Jul 1945 B-25 Mitchell bomber, lost in fog, crashes into 79th floor of the Empire State Building in Manhattan, causing 14 deaths and extensive damage.
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.

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