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Remove Hatches when Fiberglassing??

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Old 05-01-2011, 10:35 AM
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SuperCub Man
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Default Remove Hatches when Fiberglassing??

When I epoxy fiberglass my wing I was thinking of leaving the various hatches such as aileron and flap servo hatches, in place and then cutting them out just before the epoxy is hard - say when it is sort of "spongy". I'm curious how you guys handle this. I thought it would give me much better hatch lines and blend them into the wing better. Some say they like to remove them and cover them separately and that the epoxy could soak down into the hatch edges making them impossible to remove!!
Any thoughts?
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Old 05-04-2011, 01:56 PM
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Default RE: Remove Hatches when Fiberglassing??

If your talking about glassing a wood wing with .5 or.75oz glass, glass it all and then cut out hatches with sharp exacto or razor saw, what ever your better with. It works for me.

If a full composite wing, a razor saw to cut open hatches.

If your hatch edges fray a bit, hit them with thin CA, and sand as needed.

Steve
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Old 05-04-2011, 07:35 PM
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Default RE: Remove Hatches when Fiberglassing??

Thanks Steve. I will be glassing a sheeted wood wing with about 1/2 oz. cloth. My hatches are already made. I wondered if I should remove the hatches before glassing and glass them separately or leave them in place and cut them out after. That would be the way I'd prefer, but I was worried that I'd epoxy them in place. Someone mentioned that I should cut them out before the epoxy has fully set up. I have glassed wings a number of years ago but they didn't have hatches to worry about. Perhaps waxing the edges of the hatches would help in releasing them should some epoxy dribble in!
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Old 05-06-2011, 04:26 AM
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Default RE: Remove Hatches when Fiberglassing??

I would glass the hatches off the model.
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Old 05-06-2011, 05:21 AM
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Default RE: Remove Hatches when Fiberglassing??

better yet.. just get some G-10 and not have to glass the hatch's at all
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Old 05-06-2011, 10:20 AM
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Default RE: Remove Hatches when Fiberglassing??

What is G-10?
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Old 05-06-2011, 01:08 PM
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Default RE: Remove Hatches when Fiberglassing??

G-10 is a plastic/composite material like a sheet of glass basically. Or electronic board..

If your hatches are flat, it would work. You could also make you own sheets of glass by laying up on a shiny flat surface with maybe 2X 6oz clothe. Waxed of course.

Since already cut out, if you decide to use your hatches, glass them off the wing, then trim to fit. No need to risk bonding them to the wing.

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Old 05-06-2011, 04:54 PM
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Default RE: Remove Hatches when Fiberglassing??

Thanks for all that. I was pretty sure that was the way I'd have to do it but thought there might be a faster way. Guess haste could breed waste!!

Cheers

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