Back Engineered Technology?
Build one for free & see. The Potter UFO Glider templates can be downloaded here, on this web page.
About The UFO Glider
While a frisbee spins, the UFO Glider flies without spinning by "skip gliding". This weird aerodynamic skip was first observed by the man who helped coin the term "flying saucer" - Kenneth Arnold. In 1947, Arnold was cruising in his small plane when he observed a formation of nine UFOs in flight. He said: "They flew like a saucer would if you skipped it across water."
In his classic book; "UFOs & Anti-Gravity: Piece for a Jig-Saw", Leonard G. Cramp elaborates on the "Aerodynamic pendulum effect of a descending bi-conic shaped disc". The author's experiment parallels the UFO Glider.
Cramp writes: "The reader can quite easily duplicate [this] experiment by forming a light weight disc out of two paper cones... and dropping it from a height. There you will see the characteristic of the falling leaf. ...The fact remains, when people have claimed to see saucers behaving like leaves, falling or otherwise, they are making at least one good piece of engineering sense."
The Potter UFO Glider, an asymmetrical lenticular airfoil, first flew in 1988 and was the cover story in the July 1989 issue of "The Journal of Borderland Research".
My high temperature powered "paradiscs" experiments, from 1995, are also depicted in the videos.
UFO Glider Templates, Top Cone ... Scroll down for Base Cone