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The Helicopter Book
The Helicopter Book
Author: Henry B. Lent
"According to all recognized aerodynamic tests, the bumblebee cannot fly because of the shape and weight of its body in relation to its total wing area. but the bumblebee does not know this. So it just goes ahead and flies anyway." This was the sign Igor Sikorsky tacked on the wall of his wall of his office in 1930 as an answer to those who h...  more »
ISBN: 352373
Publication Date: 1956
Pages: 144
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Publisher: Macmillan
Book Type: Hardcover
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