Paul wirtes: "The stabilized set in the up-region of the tip vortex have more authority than the same area behind the wing center. This is sometimes called "wisor tail" first developed as the BV-208.P3 aircraft designed by Dr. Ing. Richard Vogt during the latter half of WW II. The reference was sent to me by Phil Burgers. It's from Aeorspace Engineering, May 1996.
"All of this connects to what Robert Hoey is doing on vulture controls, and Al Bowers on the Hortens and hat-shaped rather than elliptical lift distribution, and Karl Nickel on the same subject.
"The rear-most glider is the "Walkalong" of my son Tyler. (ed. - you can slope soar this one by pusing it along in front of a small board or even your forehead.)
"The second from largest model is electric powered and flies fine with 2.5 oz. gross weight. These studies are aimed at building a stable, controllable, slow flying model I'll call 'Housefly' to fly in a living room with a video camera."
Submitted by: Paul MacCready
