An invention of William Rahn in collaboration with Gus Miller, formerly with the Zeppelin Works in Germany, this 1933 experimental aircraft was only 15 feet long, and carried two 6-foot span rotating wings on each side. Powered with a 240 hp supercharged Wright Whirlwind motor, the wings are disposed about a central axis and change their incidence so as to produce both lift and negative drag.
It was said to fly forwards at up to 100 mph without the aid of a normal propeller.
The two 6′ rotating wings on each side theoretically would cause the plane to rise or descend vertically, or fly laterally without a conventional propeller up to 100mph, but it is unrecorded if this 15′-long creation, registered NX13247, ever accomplished any of these feats.
All Aero 