Hi, I have worked with Kevlar, and have used 1.5 oz Kevlar on my Micro HLGs. There are several issues you must consider. There is very little difference between Kevlar and FG when it comes to laying up the mold. However, in the mold preparation or perhaps the mold design, I offer 2 suggestions. First make sure you do not have tight bends the Kevlar must go over, and second, if you can avoid having to cut the parts/seams of the kevlar, that would help. Kevlar although lighter and stronger is still quite flexible when layed up. I have found it to be softer, rather than rigid. Kevlar will soak up more resin, so you have to be very careful with how much resin you use. Once the resin is applied it is hard to soak it up. You can lay things up at a bias, but be careful with strength. Both FG and Kevlar will bubble or separate, and it turns out kevlar floats in resin as it is less dense. As for the feather cut, there may be many who might say there are other methods, but for something you can purchase, it works very well, folds up nice, cuts well. The only thing I would recommend is to hang the bow rather than use the wheel to hold the bow up. This was originally tried when I saw Del Bregman's cutter, and has worked well for all my cores. As for the expense, well YES it is expensive. If you are the designing type then it makes trying things out easier. If you add the cost of bagging etc up, time, etc, CF, Kevlar, foam, then just go out an buy the plane. There is no doubt here. Just add up the feather cut, then the foam, then the resin, then the bagging materials, then the pump, tubes, etc, then on top of that add in the mistakes on the first set of wings, welll... you can run the numbers. However, when you are done you have your airplane, your fun, and your child which you can become proud of. If you are looking for molding techniques, try taking a look at my web site links. Have fun, Chris Adams http://www.scrollsander.com -----Original Message----- From: J S. <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] <[EMAIL PROTECTED]> Date: Sunday, January 07, 2001 6:02 PM Subject: [RCSE] Aother Kelar Question >In a related question, which I forgot to ask. I know that fiber glass can be >a problem sometimes laying up without getting an air pocket here or there. >I have used Kevlar for reinforcement in the molding process and have had >problems with air pockets between the Kevlar and glass. >Will the kevlar experts give up any tips or secrets to get 1.8 oz Kevlar to >lay in a mold as easy as 1.5 oz glass? >I would think to start out laying up on the bias, any other tips? > > >_________________________________________________________________ >Get your FREE download of MSN Explorer at http://explorer.msn.com > >RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
