Commercial - Sikorsky fractional prog ... Eurotilt ... EC120B backlog down ... Roton First Flight etc ...
Helicopter international ; 23 , 2
1999
Article (Journal)
Unknown
Sikorsky aircraft : first flight VS-300 50 years : 100 years Igor Sikorsky
GWLB - Gottfried Wilhelm Leibniz Bibliothek | 1989
|Sikorsky Develops Commercial Markets
AIAA | 2010
|British Library Conference Proceedings | 2000
|Sikorsky. The sikorsky "guardian."
Engineering Index Backfile | 1928
Roton development and flight test program
AIAA | 1998
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