Sikorsky VS-300 tie-down flight, 1939. Single blade, counter balanced tail rotor. Howard Levy photo
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Sikorsky VS-300 tie-down flight, 1939

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Sikorsky VS-300 tie-down flight, 1939. Single blade, counter balanced tail rotor.

Howard Levy photo

 

Added to Historical Records - Igor... and categorized in — 6 years ago

 

License: Creative Commons Attribution-ShareAlike

 

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