Air Force Museum -- Sikorsky R-4 helicopter first to be mass-produced in U.S., is on display at Wright-Patterson Air Force Base in Fairborn, Ohio. Sikorsky Aircraft photo.
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Sikorsky R-4, first to be mass-produced in US, Air Force Museum

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Air Force Museum -- Sikorsky R-4 helicopter first to be mass-produced in U.S., is on display at Wright-Patterson Air Force Base in Fairborn, Ohio.

Sikorsky Aircraft photo.

 

Added to Historical Records - Igor... and categorized in — 4 years ago

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