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Old 01-03-2010, 09:13 PM
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le fou
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Default first time vacuum bagging: leading edge not perfectly straight!

Hi,

I sheeted one of my laser's wing (from Lanier) using a home made vacuum pump. Vacuum was kept between 8 to 12". I used polyurethane glue for the sheeting and my building board which is straight. I let it cure for about 23hrs before to remove it. When I removed it from the bag, I noticed two things:
1) The sheeting superior to the wing tube and the aileron servo cutout was more compressed than the rest of the sheeting, so there is like a dent. I can fix that with some putty and sanding.
2) The trailing edge does not seem to be perfectly straight. It appears that the middle of the wing has sagged in relation to the root and the tip. I have read that I can wet the sheeting and put it back into the press to make it straight.

Can anybody give me some advice on how to fix the problems? Is it better for me to try to cut another wing core and start over? If yes, where to find a 3" EPS foam block?

Thanks a lot,

Le fou