First flight of the P-V Engineering Forum XHRP-X (first prototype of the Piasecki HRP-1 Type series)
Wednesday, March 7, 1945
- Morton, PA, United States of America 
This is a Significant Operational milestone.
Description:
This was the first flight of the experimental prototype of Frank Piasecki's concept for a U.S. Navy rescue helicopter. The pilots were Frank Piasecki and George Townson.
Source: “U.S. Navy/P-V (Piasecki-Venzie) Engineering Forum, Inc. XHRP-X ‘Dogship’”, Tommy H. Thomason, VFS 2019 VTOL History Calendar web page, Last accessed Feb 26, 2019
