Sikorsky S-47 / R-4 / Hoverfly 1 [Photo ID: 10357]

Sikorsky XR-4C   [ technical data ]
United States Army Air Forces (USAAF)
Registration: 41-18874
c/n: 1
prototype, first Sikorsky R-4 built

NASM Udvar Hazy Center, Chantilly, VA, USA, 2014-05-28

Photographer: Karsten Palt, flugzeuginfo.net, Germany
upload date: 2014-07-10

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