Some Vintage Photos, Part 1/2

The rotor principle has been applied to airplanes by I.C. Popper as shown in this new plane at Roosevelt Field, N.Y., May 16, 1932. Four conical rotors, or spindles, replace the plane's wings. The ship is equipped with three motors, two of them running the rotors and the other supplying the traction. The inventor claims it has double the lifting power of a winged plane and can be landed at half the speed. (Photo by AP Photo)
Some Vintage Photos, Part 1/2
   
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