Keywords: Piasecki HRP towing tests Jun1953.jpg A U S Navy Piasecki XHRP helicopter with flotation bags during towing tests in June 1953 U S Navy Naval Aviation News March 1982 p 16 http //www history navy mil/nan/backissues/1950s/1953/Mar53 pdf 1953-06 USN PD-USGov-Military-Navy Piasecki HRP Rescuer |