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Nov 15, 2009, 08:27 PM
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India, Bangalore
Joined Jul 2002
1,001 Posts
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bagging ailerons
Hi guys,
I have ailerons shaped from some light wood, each aileron is about 24" long and 2.5" wide. There are lightening holes to save some weight. The ailerons have a 45° bevel at the hinge line. I need to glass the ailerons, and get a nice smooth surface ( like from using mylar skins ) for the tape hinge. Any suggestions on how to glass it? -TIA Uttam |
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Nov 15, 2009, 09:04 PM
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Cody, WY
Joined Nov 2007
6,859 Posts
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First off, since you put lightening holes in the ailerons you will not be able to use the standard mylar and vacuum bag. The vacuum will "dimple" the mylars around the lightening holes. You will have to the replace the mylar with something thicker that won't deform under the vacuum pressure.
Adam |
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Nov 15, 2009, 09:07 PM
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India, Bangalore
Joined Jul 2002
1,001 Posts
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Thanks Adam. I thought so too. Maybe lesser vacuum? I will try bagging without the fiber glass layup to see how bad the "dimples" are.
-Uttam |
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Nov 15, 2009, 09:08 PM
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Cody, WY
Joined Nov 2007
6,859 Posts
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It may work with less vacuum. It really depends on how large the holes are. I don't like to go below 9" Hg.
Adam |
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Nov 25, 2009, 10:49 AM
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Tracy, Ca
Joined Jun 2004
654 Posts
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You'll find that any amount of vacuum with 14mil mylar (or less) will show dimples unless the lightening holes are tiny. You will either have to find a thicker replacement for the mylar, or do it with no vacuum. You might be able to sandwich the mylar between the aileron and some bead board, or something similar that will spread the load evenly.
Good luck, DLD |
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