First flight of the prototype (XHR2S-1) of the S-56/H-37 Type series

Description

XHR2S-1 was the designation assigned to the prototype by the US Navy. Jimmy Vine and Jim Chuders were the pilots.

Source: S-56/HR2S-1/H-37 Helicopter, SIkorsky Product History, Igor I. Sikorsky Historical Archives, Vinny Devine, as of  Jul 18 2016