Ron, "If you believe it's not needed, why not leave it out and save weight, or at least use half as much?"
I thought that this statement made it clear: "On my project, I've used only polyester resin and although not yet flying or airworthy, it feels very strong, even after many years out in the open and even rain at times." I'm not advocating anything, I merely answered someone's question. A few years ago, I used saligna wood for one of my projects. Up to that stage, it has never been used in this country for aircraft building, at least not to my knowledge, that is. Today it is totally acceptable and even advocated by some to replace Spruce or Oregon. I believed Jack Lambie and I used Polyester resin for my project. The nature of my work takes me all over our county and hence my very slow progress. Never the less, my partially completed project has traveled in furniture trucks, along with all my household furniture and garage tools on more than 10 or 12 occasions. Sometimes, it stood outside in the sun and even rain for extended periods - thus, it has taken quite some hammering. Yet I dare anyone interested to come and look at my polyester resin sections and see for yourself. Yes, I know the bond between the skins and spars are critical - you are welcome to inspect mine as it is now. I say again, I am not advocating anything. I answered a question and I backed it up by a book on homebuilt aircraft - I think that Jack Lambie is rather well known in the flying community and I have not heard anything as yet questioning his judgement. Builders are using foam to create spar extensions for longer main wings and I've never heard any ill comments on this - would you consider this practice less dangerous? Just because it has not been done before does not always mean that it cannot be done safely and that it should not be done. The onus is on the builder to verify that his building practices are safe for flying. You've asked for my reply, so here it is. Hennie -----Original Message----- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of Ron Freiberger Sent: Thursday, August 10, 2006 11:04 PM To: 'KRnet' Subject: RE: KR> polyester resin Hennie, If you believe it's not needed, why not leave it out and save weight, or at least use half as much? Ron Freiberger mail to ronandmar...@earthlink.net Hi Chris, In Jack Lambie's book on building and designing composite aircraft, he suggests using only Polyester resin when building a KR2 and explains that all the load carrying componants are wood and that epoxy is not really required from an engineering viepoint. Hennie +++++ _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html ----------------------------------------------------------------------------------------- This e-mail is confidential and is for the addressee only. Please refer to http://www.kumbaresources.com/email-disclaimer for important disclaimers. -----------------------------------------------------------------------------------------
