Hi guys Firstly, thanks to all who answered to my foam questions. Frankly I am confident in using either polystyrene or polyurethane foam in places like the tail feathers and turtledecks. What I am concerned about is using polystyrene foam in places that will be holding fuel (my wings) and this is where all the replies to my post went a little astray. Whether we use open cell, closed cell or what ever it is all useless if the wing skin cores dissappear at the first whiff of fuel. This week I did a test with a piece of polystyrene and a piece of polyurethane foam, squeegied micro into the polyurethane and straight resin on the polystyrene.Squeegied a piece of 600 gram BID glass into contact and left to cure for a day. The results show little difference in the force required to seperate the glass from both foams. If anything, I am now in favour of the polyurethane simply for the ease of shaping and the truer, stiffer product obtained by sanding. If this foam I have is the same as what you are using over there, I will be building my wings out of it. Now to convince the inspector. Once again guys, thanks. Dene Collett KR2S-RT builder Port Elizabeth South Africa mailto: dene.coll...@telkomsa.net P.S: checkout www.whisperaircraft.com
----- Original Message ----- From: "Stephen Jacobs" <ask...@microlink.zm> To: "'KRnet'" <kr...@mylist.net> Sent: Tuesday, September 07, 2004 11:04 AM Subject: RE: KR> polystyrene & other foams > Dene > > Are you aware that Sagex in Johannesburg also supplies polyurethane - > they carry a range thicknesses from 8mm to 300mm (2440 x 1220). They > only keep 32 and 35kg/m3 in stock - heavier on special order. > > I deal with Charmaine van Biljon > [charmaine.vanbil...@owenscorning.co.za] - ask her to fax you the price > list. > > Steve J > > > > > _______________________________________ > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html >
