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Glass fibre woven cloth and epoxy resin

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TigerOC27/10/2020 20:43:06
314 forum posts
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I build foam core wings and have in the past used the wbp method. A guy in the club who worked in composites advised looking at peel ply. The last set of wings I have completed I used a new technique.

Preparation; cut the cloth and peel ply before starting. Prepare an appropriate size home vacuum storage bag. Ensure the surface is dust free. Have disposable/vinyl/latex gloves to hand.

Lay the glass cloth and apply epoxy laminating resin from the centre and squeeze out with a soft squeegee working outwards. I use a piece of depron. When done, apply the peel ply and go over the surface with your hands to make sure the surface is smooth and eliminate any creases or air bubbles.

Now place in the vacuum bag and pull a vacuum. Leave it for several hours. Open the bag and remove. Pull the peel ply and you will have a stippled super strong surface because all excess resin has been drawn out of the surface into the peel ply. It also cures much faster than just coating the surface with resin.

This provides a stippled surface with a nice sheen. It can be sanded to remove the stipples. The experts say this method is as close to vacuum bagging that you can get with simple tools.

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