1912 Helicopter Designed By German is a photograph by Everett which was uploaded on January 21st, 2013.
Title
1912 Helicopter Designed By German
Artist
Everett
Medium
Photograph
Description
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
Uploaded
January 21st, 2013