The Platt-LePage XR-1, also known by the company designation PL-3, is an early American transverse-rotor helicopter, built by the Platt-LePage Aircraft Company of Eddystone, Pennsylvania. The winner of a United States Army Air Corps design competition held in early 1940, the XR-1 was the first helicopter tested by the USAAF, flying in 1941.
The Platt-LePage XR-1, also known by the company designation PL-3, is an early American transverse-rotor helicopter, built by the Platt-LePage Aircraft Company of Eddystone, Pennsylvania. The winner of a United States Army Air Corps design competition held in early 1940, the XR-1 was the first helicopter tested by the USAAF, flying in 1941.
Source: Wikipedia "Platt-LePage XR-1" · CC BY-SA 4.0
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