fixing small cracks, plus bad epoxy - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 08-18-2016, 03:46 PM   #11
diss3ntienc
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Re: fixing small cracks, plus bad epoxy


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I had some damage on the wing tip of my cub after rejected TO.

Made a new curved corner and added doublers for extra strength. It's a little messy, but holds strong!

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Old 08-18-2016, 09:35 PM   #12
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Re: fixing small cracks, plus bad epoxy

If its strong and its hidden by the covering... Its a good fix!!!
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Old 08-19-2016, 09:31 PM   #13
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Re: fixing small cracks, plus bad epoxy

Thanks for the tip Max, I will try to use the toothpick idea, it sounds like it should hold really strong.

Right now I am trying to find epoxy. I bought some JB weld, and after 8 hours it is hard, but still sticky. It was mixed very well, and with identical amounts of each substance (by weight atleast). Am I doing something wrong, or is my luck with epoxy just bad?
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Old 08-19-2016, 10:10 PM   #14
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Re: fixing small cracks, plus bad epoxy

I use Bob Smith Industries 5minute quik-cure epoxy that can be purchased at most hobby shops. great stuff and cures in 5 minutes almost rock solid! never had an issue with it being sticky
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Old 08-24-2016, 04:22 PM   #15
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Well, it turns out that there were 2 cracks, and it was cracked all the way. So I took the piece out, and epoxied it back in. Should be really strong, or atleast as strong as it was before.
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Old 08-24-2016, 05:14 PM   #16
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Re: fixing small cracks, plus bad epoxy

You way overdid the repair. All that epoxy and wood at the wing tip is going to give you a heavy wing tip which will cause you issues while flying. Too late to go back but my suggestion would have been to use CA or wood glue. if you needed a doubler then 1/16 balsa or very light fiberglass and use CA to glue the cloth to the wood. Be careful on your next flight as it will be way out of trim
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Old 08-24-2016, 06:24 PM   #17
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I didn't have any wing tip re+airs, if you are reffering to the picture, then someone else posted that. I only had tail repairs, and will certianly be ready to correct on the first flight after the fix. Whenever I fix something, on the next flight I always treat it like a maiden, I am ready on the rudder and am prepared to trim it out.
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