Hi Dave Many thanks the reply. I am well familiar with the KR2 Super and its website, have been studying it since February of this year as well as many other KR builders sites.
I like the KR2Super very much and building with composites is no problem for me - been doing for about ten years for model RC planes ( a different story but composites are not new to me). As usual one sets out with a plan and a list of desires which normally are not fulfilled in every way by existing designs - in other words one tends to like different things about different designs but never finds the "ultimate solution". So I want a two seat, side by side and homebuilt from plans. It would be great if it could fit into LSA limits (again a wishful thought). That led me to KR and the KR2S. Further research led me to alternative materials due to wood availability in my country. I found the KR Super and got excited. Trouble for me though is I want the original wing design with WAF's, fixed undercarriage, fuel tanks in the stub wings and I want to put it onto a trailer to take home in winter and save storage cost for fuel! Scott's KR2 Super does not allow for this with his spar design. I also like the way Mark has rebuilt his wings - from the fotos it is a far simpler construction the the Supers but he used "beefed up" woodens spars. I also find nothing difficult/complicated about the Supers spar design - website has excellent instructions, very good foto's and if followed correctly and taking care with the layups and methods an easy part to make. I am by no means a designer and would be lying if I said I understood half the technical discussion on spar design so was hoping to compare what I have found out and worked with to someone else who may be more familiar with the design aspects of a spar. So back to my original question/query - has anyone designed alternative composite wing spars using the original WAF's mountings design idea? thanks again Greg ------------------------------ Message: 4 List-Post: [email protected] Date: Fri, 11 Nov 2011 11:06:44 -0600 From: "Dave McCauley" <[email protected]> Subject: RE: KR> KR2 spars To: "'KRnet'" <[email protected]> Message-ID: <[email protected]> Content-Type: text/plain; charset="us-ascii" Greg, I'm building a KR Super2 which is an all composite derivative of the KR2S. The main spar has a core of 1/2 inch last-a-foam sandwiched with multiple layers of fiberglass and has spar caps of carbon-fiber rod. The construction is complicated and goes very slowly. It is strong but only 1 inch thick so replacing the wood KR2S box structure wouldn't be easy and mounting the landing gear would also require much work. So, I believe you'd be much better off building the spar per KR2 plans. If you like to learn more about building the KR Super2 go to www.krsuper2.com Dave McCauley
