Most of what I find on the web regarding winglets has to do with sailplanes, which are at the slow end of the speed spectrum. KRs operate at considerably higher speeds, so I'd wonder if there's not a compromise somewhere without actual testing on a KR. I might be talked into testing that later on, as wing tips is something I'd like to experiment with later, once I'm flying and have some performance numbers to work with. For those who want to do more research, see http://www.aoe.vt.edu/~mason/Mason/AeroWinglets.html .
Mark Langford, Huntsville, AL N56ML "at" hiwaay.net see KR2S project at http://home.hiwaay.net/~langford
