Thanks a lot Mark, it is exactly what I want to know, especially thickness and strength. Now I can choice some things here. As about number of layers, I had read the manual, and that why I was asking, there are just a few words about and I wasn't sure. I am very appreciate your assistance.
BR, Alex Birca -----Original Message----- From: Mark Langford [mailto:langf...@hiwaay.net] Sent: Wednesday, May 07, 2003 4:27 PM To: KR builders and pilots Subject: Re: KR>Fiberglass question Alex Birca wrote: >>the question is, what is the thickness and tensile strength of fiberglass which is used for lay-up process. May I use one type (thickness or density?) of fiberglass or it should be different one in different area? Where I can read more detailed info about used fiberglass in KR construction.<< No problem, Alex. Fiberglass typically used for all KR construction is 5.85 ounces per yard, 18 x 18 plain weave, .009" thick, with tensile strength of 250 x 250 psi. I'm not an expert on stock KR construction, but I believe in most places only one layer is used, except on the wings where you end up with two layers around and forward of the main spar, overlapping at the leading edge for a few inches to yield 4 layers at the leading edge. You probably end up with more than one layer on control surfaces as well. All of this is specified in the KR builder's manual. I don't know of any place online where these details are given, but others are welcome to chime in or correct any misinformation I've given (from memory)... Mark Langford, Huntsville, AL mailto:langf...@hiwaay.net see KR2S project N56ML at http://home.hiwaay.net/~langford _______________________________________________ see KRnet list details at http://www.krnet.org/instructions.html
