Vought-Sikorsky 300
Encyclopedia
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See also
External links
- http://books.google.com/books?id=vdkDAAAAMBAJ&pg=PA380&dq=defiant&hl=en&ei=Aud5TOmcGoqonQehs9mWCw&sa=X&oi=book_result&ct=result&resnum=10&ved=0CFUQ6AEwCTgK#v=onepage&q=defiant&f=true"Wingless Helicopter Flies Straight Up", Popular MechanicsPopular MechanicsPopular Mechanics is an American magazine first published January 11, 1902 by H. H. Windsor, and has been owned since 1958 by the Hearst Corporation...
, September 1940 article showing Sikorsky flying his first helicopter] - Heroes of the Sky: VS300 exhibit at the Henry Ford Museum