Camping Trailer

[BEAR]

Vacuum bag is what they mean. You glass something and while the glue is still wet you put it in a big platic bag and suck the air out. This queezes the adhesive and helps make sure it saturates the glass fiber. It is a bit more than what I have described but those are the basics. I believe Ken Reilly and Larry Haynes have taught classes on this topic for club members. I do not have their experience as I only helped do it on helicopter interiors for air ambulances/medevac. My teacher does it for Great Lakes Airlines now. Warrren certainly knows how to do it and I have been told he is an expert.

[Warren B. MusselmanModerator]

😳 Bear… you’re embarrassing me.

There are several reasons for v-bagging – one, to ensure that the fabric is thoroughly tight to the underlying substrate. Two – to ensure that the fabric is thoroughly saturated with resin (not really a function of v-bagging, but v-bagging helps) and most importantly the third reason – to makes sure that you don’t have TOO much resin. The ideal weight ratio is about 45% resin and 55% fabric – roughly speaking. There are variations on this based upon the resin and fabric used, but the ideal ratio is that there is just enough resin to immobilize the fibers in the fabric relative to one another so that the strength of the individual fibers is maximized.

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