First flight of the P-V Engineering Forum XHRP-1
Monday, November 3, 1947
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Description
Also known by the company designation PV-3, this was the first American tandem rotor helicopter. 2 of these aircraft were produced, 1 for static and dynamic tests and 1 for U.S. Navy trials. Source: AHS Calendar November 2013 Note: A review of many different reference sources indicates that this aircraft must have flown in 1946 instead of 1947. This would also be consistent with the production aircraft (HRP-1) flying in August 1947
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