A number of people have asked me for more info about the dynamic soaring article written up in "Technical Soaring" (an SSA publication) in the early 1970's. I finally went through my aeronautical reference library and found it, and here it is: ================================= Title: DYNAMIC SOARING IN THE ATMOSPHERIC BOUNDARY LAYER: AN EXPERIMENTAL INVESTIGATION 15 pages by: Vadym V. Utgoff Assoc. Professor, Aerospace Engineering Dept U.S. Naval Academy and Fredrick G. Johnson Midshipman USN U.S. Naval Academy Presented originally at the XV OSTIV Congress, Rayskala, FINLAND, 1976 Republished in TECHNICAL SOARING Volume V, Issue No. 2, December 1978 A quarterly technical journal on soaring and motorless flight Published by the Soaring Society of America ABSTRACT: The feasibility of maintaining continuous non-powered flight by utilizing a vertical wind velocity gradient is analyzed. It is concluded that the wind velocity gradients which have been observed in the upper atmosphere are not sufficiently steep for this purpose; but wind shears likely to be encountered in the surface boundary layer should be adequate... ================================== Dan deVries DEVRIES DESIGN, Inc. Product Design --+-- Patent/Litigation Graphics _______ _____________ |_______________ 0 [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]