How long was Igor Sikorsky first helicopter flight?

Question by Kevin: Igor Sikorsky first helicopter flight?
I’m doing a project for my humanities class and need to know how long Igor Sikorsky’s first helicopter flight was.
Thanks

Answers and Views:

Answer by Laika.X
http://en.wikipedia.org/wiki/Igor_Sikorsky

September 14, 1939 by this article.

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