The previous e-mail is a result of not using peel-ply during epoxy lay-up. Here is the reason to use peel-ply. [ Get the polyester lining [Peel-ply] from a clothing fabric store, it cheaper than from aircraft stores.] 1. The density of fiberglass and peel-ply is less than any resin you may use. Therefore, it floats in the resin layer [ on top of the surface like a wood boat]. 2. When peel-ply is used, the resin is brought to the top surface of the fiberglass cloth by capillary action. [ the cloth is forced to the bottom because of this phenomenon of nature. This excess resin fills the cloth pattern surface [ no cloth pattern to fill], [no additional filling is needed [less weight]. If to much resin is used it will sand off easily. Very little sanding is necessary if the right amount of resin is used. 3. Filling and sanding is best done on the foam before fiberglass is applied. My procedure is fill and sand to the extent that you would be ready for paint, the surface is fully finished, Then apply the fiberglass cloth lay-ups over the foam and wood framing. The above procedure eliminates 95% of the filling after fiberglassing.[ over lapping seams must be filled and feathered off before prime ]. 4. I have discovered that using the 1.5 oz. model airplane fiberglass with the last lay-up over the 5.85 oz fiberglass and under the peel ply eliminates pin holes.[ the surface is perfect however, the overlaps feathers off easily]. The 1.5 oz cloth lays-up over square corners also. Lessons learned laying fiberglass for 30 years.
KRRon ----- Original Message ----- From: "Dan Heath" <da...@alltel.net> To: <kr...@mylist.net> Sent: Thursday, October 30, 2003 4:38 PM Subject: RE: KR>And buy vinyl-ester only when you are ready to use it. It hasarelative short shelf life. RE: On the plus side: it's about half the price of epoxy, works the same, has about the same cured strength I don't want to start the vinyl ester thing all over again, but I think you need to know that it is NOT ( yes, that is yelling ) like epoxy. It is a laminating" resin and therefore, leaves a sticky surface for the next layer to be applied. You cannot sand it without gumming up your sandpaper, in fact, it is almost impossible to sand until you get that top layer off. It also must be shipped HAZMAT, in case you care. Use the right resin for the application. Your results WILL vary. N64KR Daniel R. Heath - Columbia, SC da...@kr-builder.org See you in Mt. Vernon - 2004 - KR Gathering See our KR at http://KR-Builder.org - Click on the pic See our EAA Chapter 242 at http://EAA242.org _______________________________________________ see KRnet list details at http://www.krnet.org/instructions.html
