S-47/R-4
The type was originally known as the VS-316 before the company re-organization that saw SIkorsky split-off from Vought.
Type Description
The type was originally known as the VS-316 before the company re-organization that saw SIkorsky split-off from Vought.
Family Tree
*No Variant assigned
Milestones Associated with the S-47/R-4
January 14, 1942
XR-4 :
First flight of the prototype (XR-4) of the Vought-Sikorsky S-47/R-4 type series
April 20, 1942
XR-4 :
Demonstration of the Vought-Sikorsky XR-4 to the US military and Government
May 30, 1942
XR-4 :
The US Army Air Corps accepts its first helicopter (Sikorsky XR-4)
May 6, 1943
XR-4 :
Col. Frank Gregory performs first shipborne trials with a Vought-Sikorsky XR-4
October 16, 1943
HNS-1 :
USCG rotary-wing aviation commences
January 3, 1944
HNS-1 :
First helicopter mercy mission conducted (Sikorsky HNS-1 Hoverfly)
January 16, 1944
YR-4B :
First helicopter take-off and landing aboard ship (Sikorsky YR-4B)
April 27, 1944
YR-4B :
First combat rescue by a rotorcraft (Sikorsky YR-4B)
August 11, 1944
HNS-1 :
First in-flight test of a rescue hoist on a helicopter (Sikorsky HNS-1 Hoverfly)
