It's Vinyl Ester not vinyester. This resin has better strength and toughness than the polyester resin and is the preferred choice for fuel tanks. Polyester is very brittle and is low density. It's good for non structural applications like fillers and laying up wing ribs and bulkheads. If using polyester resin try to use the laminating resin instead of the surfacing resin due to the wax content. Polyester is hygroscopic meaning it attracts moisture from the air which is the reason for the wax in the surfacing resin. It has to be cleaned or sanded off before applying a second coat. The laminating resin, which has no wax, is always tacky due to the moisture in the air when cured.
Joe Melbourne Fl. > Message: 3 > Date: Fri, 2 Oct 2009 17:46:07 +1000 > From: "Phillip Matheson" <phillipmathe...@bigpond.com> > Subject: Re: KR> RE: vinyester vs polyester > To: "KRnet" <kr...@mylist.net> > Message-ID: <3B6F34116E75481AAE56F35E076F5829@Phillip> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=original > > Fred, > > Polyester should work just fine. That's what Piper used to > build the tip tanks on the Cherokee 235 and Cherokee 6. > Polyester has it's difficulties in certain applications, but > it works quite well for a fuel tank. > > ------------------------------------------------------ > > DO NOT USE Polyester!!!!!!!!!!!!!!!!!!!!!Do you REALLY want > to take the chance????? > > DO a test yourself and let us know your results!!!!!!!!! > put some polyester in some avgas and ULP. > > I would only USE Vinyl Ester. ( not Epoxy) unless the > manufacture says it's OK. not someone else. > > Too many people have had problems with epoxy, I have seen > what leaking tanks on a Lancair does.. NOT good. > > > Phil Matheson > SAAA Ch. 20 http://www.saaa20.org/ > VH-PKR > Australia > > EMAIL: phillipmathe...@bigpond.com > KR Web Page: www.philskr2.50megs.com
