🚀 go-pugleaf

In article <19930122131342.Roger.Wilfong@umich.edu> Roger.Wilfong@umich.edu  (Roger Wilfong) writes:

>Do you just use a plain old polyethelyne (sp?) bag (like a garbage bag) and 
>hook it to the vacuum side of the compressor?  

There was a good article in the latest Model Aviation (or was it Model
Builder?) magazine. What they usually use vacuum bagging for is wings, 
so the bags are usually made out of large polyethylene sheet. They sell 
plastic foldover strips to seal the edges.

The idea is to use air pressure to squeeze as much resin out of the 
fiberglass layer on the styrofoam wing core as possible - this forces
the glass fibers together and results in a lighter stronger wing. The
wing will also have a mirror smooth surface because you use a layer 
of drafting mylar right up next to the curing fiberglass. On top of 
the mylar goes a blanket ("breather felt" I think they call it) and
the whole  assembly goes in the bag. 

A while back I suggested that someone try this method to make fiber-
glass rocket tubes with mirror finishes. Just lay it up over a mailing 
tube (or better yet iron pipe? 9-)

>Do you need to do anything to avoid sucking the resin into the compressor?

I don't think this is too much of a problem.

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Iskandar Taib                          | The only thing worse than Peach ala
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