Vertipedia - First flight of the prototype (XHSS-2) of the Sikorsky S-61/H-3 Type series

Description:

First flight of the type that would become the SH-3 and Sea King helicopters.
Source: "U.S. Navy/Sikorsky SH-3 Sea King", Tommy H. Thomason, AHS Calendar September 2016

U.S. Navy/Sikorsky SH-3 Sea King

First flight of the prototype (XHSS-2) of the Sikorsky S-61/H-3 Type series

Wednesday, March 11, 1959