---------------------------------------------------------- KIS-List Digest Archive --- Total Messages Posted Sun 11/22/09: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:13 PM - Winglets & Performance (Galin Hernandez) ________________________________ Message 1 _____________________________________ Time: 06:13:39 PM PST US From: Galin Hernandez Subject: KIS-List: Winglets & Performance All; After many flights (2 with new winglets, 2 with old wingtips) at different power settings, I can honestly say there is no significant change in aircraft performance. My numbers show, at best, a maximum 3kt increase in speed with the new winglets based on GPS measured TAS at 1000ft MSL. At 2,400RPM I was getting between 138-139KTAS with the winglets and 136-137KTAS with the old wing tips everything else being equal. Climb performance was not changed at all, that I could measure. I am still getting around 1200fpm climb at MGW, full power from SL to 3,000ft at 100KIAS with either wingtip. I feel It is not conclusive enough for me to warrant buying the new winglets to replace the old ones. But, since I already have the new winglets, I will keep them on. I did get a tiny increase and to me they do look good. I can tell you I enjoyed doing the test flights and "crunching the numbers" afterwards. It made all the "theory" come alive even if nothing much was found after it was all over. The best part was it gave me something to do while flying instead of just burning holes in the air going nowhere fast. :o) Galin N819PR ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message kis-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/KIS-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/kis-list Browse Digests http://www.matronics.com/digest/kis-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.