Steve Jacobs wrote: > The Ashok sections generated and made available by your kind self and > others offer the 48" section, but offer a shorter section for the tip - > closer to 30". > No doubt a good reason, but I am missing it. > If you have a moment, maybe talk about the differences in the selection > of airfoils included in the pdf file.
Ashok designed that airfoil specifically for the KR2S, but the set of points he generated was for a standard "unity" profile, based on the chord length being 1.000. Not that it won't work just fine on a KR2, but at the time, I couldn't imagine anybody wanting to build a KR2 wing if they were starting from scratch, so the templates are also designed for the KR2S, rather than the KR2, hence the lack of a 36" chord tip template. The S wing planform is different, by virtue of the fact that the aft WAFs (wing attach fittings) are ALL bent 3 degrees, rather than just half, so the aft spar rakes forward 6 degrees. That makes the template at the end of the spar smaller (33"), and answers your question. The wing area is compensated for by adding a hoaky foam extension. The drawings that I made allow for the forward-thinking builder to make his spars longer, and include a template (30-11/16") for a tip located way out at 132.75" from the centerline. There's a dotted outline of a spar and the mention of this option printed on the template itself. There are a lot of details on these templates that I put in just to make building them easy and more foolproof. Mark Langford, Huntsville, AL N56ML at hiwaay.net see KR2S project N56ML at http://home.hiwaay.net/~langford
