>-----Original Message----- >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > >does anyone have a trick for taking >the curl out of mylars before you first use them?
I recently answered this in an email so here is that response; I always immediately take the roll of mylar out of the box, stand it on end and then expand the roll to about a one foot diameter and then just let it stand on the floor that way. I think the problem may happen when the mylar is rolled tightly and then left in a box in a hot truck or warehouse somewhere before you get it. If you are unfortunate enough to get a batch of mylar like that then you will have to try and uncurl it. The following is a summary of recent messages in the SALglider group (message numbers 7262,7262,7264,7267) http://groups.yahoo.com/group/SALglider/messages 1) I've heard from someone but can't recall who. You could flatten them out by ironing them on a flat bench. You need a tissue between, not to scratch the surface. I haven't tried it myself so no garantee. 2) I used a heat gun to gently warm them. They flatten out fine. Tom 3) I had some luck putting 16"x 48" curled mylars in a large basin like a bath tub and pouring boiling water to cover them. I never found a good way to uncurl mylar myself but those three suggestions come from other guys who have. If you don't/can't uncurl the mylar then you will have to live with the curly mylar or buy some new mylar. There are ways of dealing with curly mylar. The curl causes problems when you do layups. To avoid that problem you can stick the mylar down to the bench with 3M77. The curly mylar is also hard to paint since it won't stay put in a spray booth. You can fix that problem by taping spruce sticks to the back of the mylar to hold them flat while you spray them. Other than that there really isn't any trouble from curly mylars. Phil RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
