Steve Jacobs wrote: > With respect - I am not convinced the above is correct when it comes to > polystyrene (Styrofoam?).
You're right. I was talking about urethane foam. And it all depends on the process. I suppose if you were to lay dry fiberglass onto the wing and pour epoxy all over it, you'd eventually end up squeegeeing epoxy (heavy as it is) down in to the pores and it would work. But that's not how I do it. I lay mine up on plastic and apply just enough epoxy to wet it out, and not a gram more, then squeegee it into contact onto the foam. If I did that (with urethane foam) it wouldn't stick very well at all. That was my point. No doubt that polystyrene would do slightly better, but it still would be far from optimal IF you put used the method that I use, getting the fiberglass perfectly wet out (not too much epoxy, not too little) and then squeegeeing into contact. It all depends on how much epoxy you have on the glass when you start squeegeeing it into contact, and I suppose that's a varible you could control to make it work. Maybe I didn't give him enough credit. I'll do it my way, and he's welcome to do it his way. I was just trying to keep folks from getting the impression that micro under glass (over foam) is not as much of a "no-no" as his message stated, and in fact is acceptable and lighter if you build using the methods and materials detailed in the plans. Mark Langford, Huntsville, AL N56ML at hiwaay.net see KR2S project N56ML at http://home.hiwaay.net/~langford
