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The Sikorsky R-4 was the world's first mass-produced helicopter and the United States Air Force's first service helicopter.
The VS-316, was deve...
jaglavaksoldier • 6,536 views
My dad tested Sikorsky. What a ride that must have been.
Marshall Tucker Concert
GKLAKEMAN • 172,904 views
My dad tested Sikorsky. What a ride that must have been.