1912 helicopter designed by German engineer, ?
1912 helicopter designed by German engineer, Otto Baumgaerte. It can rise without a start, remain motionless in the air a longer time, and be turned in desired direction. Two propellers, with six blades each, set upon the same axle. By means of the angles at which the rotors are set, they serve for raising and lowering purposes. (CSU_ALPHA_1509) CSU Archives/Everett Collection
Picture No
10674259
Media ID
45240468
Size
3000px x 2125px
(1.7MB)
Credit
Mary Evans / Everett Collection
Usage Restrictions
Strictly editorial use only. Please contact Mary Evans if any other use required
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Angles Axle Csu 2012 12 Csualpha Desired Dresden Experimental Longer Lowering Means Motionless Occupational Propellers Purposes Raising Remain Rotors Serve
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