Windfreak - Radio control model.
Quote: "Finally - an advanced flying wing sailplane design that will match the duration of the best conventional designs, while maintaining the legendary maneuverability of flying wings.
Flying wings have long intrigued me. but I have been very puzzled by their absence from the usual flying field. Furthermore, I have never Seen a truly competitive design used in competition. The reason for this state of affairs becomes rather obvious when one watches the flight performance of typical flying wings. They tend to have very poor glide slopes which result in poor duration, they seem to have to fly fast, have strange control behavior, and tend to be suicidal on tow.
At the same lime, it is apparent from theory that flying wings should offer magnificent maneuverability and have an outstanding glide slope. Now, greater maneuverability and glide slope sounds ideal for a sailplane - why aren't people flying them? The answer is that nobody has developed a flying wing that would match or exceed the performance of conventional sairplahes. I do not know why better flying wings haven't been developed, but felt that there was no good reason that one couldn't be developed, I have designed a long string of conventional salplanes. Some of these were not good performers, but some of them were outstanding. I felt that I had determined what would produce outstanding flight performance. Since flying wings are subject to the same laws of flight as conventional gliders. I believed that I could apply my experience and knowledge to a flying wing with excellent results.
The Windfreak was inspired by Ken Bates' 'Windlord', which it superficially resembles (Model Aviation, March 1978). However, the Windfreak is a totally different aircraft except for the same general wing planform. The important aerodynamic parameters are quite different; the air frame is grossly stronger and, probably most important, a much different airfoil is utilized. While I obviously feel that the Windlord can be improved upon, I nevertheless feel that Ken Bates' design was a giant step forward in the design of flying wings. The name Windfreak was partly derived from Windlord out of appreciation for Mr Bates' design. The 'freak' part of the name seemed appropriate because the ship is certainty the most unique ship One is likely to see at your local flying site.
In this article I will attempt to give some insight into how I go about designing a sailplane, some of the parameters involved, what the various parameters do, and the various compromises invo:vecl. Before we can design a sailplane, however, we must know what we want it to do, I, therefore, developed several performance goals I hoped to accomplish. These goals used Lee Renaud's Olympic II (oz5116) as a yardstick. I doff my hat to Mr Renaud...."
Hi Steve - Here is Rodger Sanders' Windfreak from Radio Control Models magazine issue 11-78.
Direct submission to Outerzone.
Did we get something wrong with this plan? That happens sometimes. Help us make a correction
* Credit field
The Credit field in the Outerzone database is designed to recognise and credit the hard work done in scanning and digitally cleaning these vintage and old timer model aircraft plans to get them into a usable format. Currently, it is also used to credit people simply for uploading the plan to a forum on the internet. Which is not quite the same thing. This will change soon. Probably.
This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.
© Outerzone, 2011-2018.
All content is free to download for personal use.
For non-personal use and/or publication: plans, photos, excerpts, links etc may be used, provided that full and clear credit is given to Outerzone with appropriate and specific direction to the original content i.e. a direct hyperlink back to the Outerzone source page.
Unauthorized use and/or duplication of this material without express and written permission from this site's owner is strictly prohibited. If we discover that content is being stolen, we will consider filing a formal DMCA notice.