Descent-Vane Development

Glenn Leaver explains the importance of patenting the Descent-Vane-System.........

While the Descent-Vanes primary function is to arrest an unpowered descent, in forward flight its' function is that of an ordinary wing. However, historically, only a handfull of wings have been identified as having the necessary slow & stable vertical descent characteristics. These include the 1896 Montgomery Glider (Left, top) and the 1933 Pou du Ciel,  (left, middle) both of which were tandem-winged. Besides its descent-arresting ability, the tandem planform provides greater stability and eliminates the yaw-induced "bobble" that can occur when torque-imbalances occur in the flying platforms' rotor. This "bobble" can be seen in this video (bottom left) of a single-descent-vaned test model. At about 1/3rd into the flight the models' tail momentarily interrupts the radio control signal, cutting-off the motor, but the model quickly regains  its equilibrium.

BELOW:  Pilots and non-pilot GI's learning to fly. A standing position was found to be more responsive, and a larger (8-foot-diameter) disk was more stable than the 5-foot disk shown here. Kinesthetics are similar to walking, except without friction with the ground to augment stopping/starting. Instead, one must estimate the lag/lead time for initiating or stopping motion, and this is what takes a few minutes practice. Mastery occured in as little as 5 minutes. For future test vehicles, the army included a Specification requiring it to be capable of being learned in less than 20 minutes.

© 2015 by Glenn Leaver, President, Aeromancer Flight Design, Inc.   Proudly created with

NOW AVAILABLE!  "Why the 'Flying Pods' Cannot Succeed"
Subscribe above to receive the "Airhead" Founder's BLOG.
Or, just email me at:
...with your comments, questions or inquiries! Feel free to contact me to chat about the Lift-JET, or about Vtol in general, or your own particular pet project? I'd love to hear from you
       Thank you,  Glenn.