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| Construction Ideas, Hints and Tips For all the builders out there. Ask questions, make suggestions, trade tips. |
Topic Review (Newest First)
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| 08-24-2016 05:24 PM | |
| Hubert 1 | 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. |
| 08-24-2016 04:14 PM | |
| Mike Sebastien |
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 |
| 08-24-2016 03:22 PM | |
| Hubert 1 | 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. |
| 08-19-2016 09:10 PM | |
| diss3ntienc |
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 |
| 08-19-2016 08:31 PM | |
| Hubert 1 |
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? |
| 08-18-2016 08:35 PM | |
| Max |
Re: fixing small cracks, plus bad epoxy If its strong and its hidden by the covering... Its a good fix!!! 
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| 08-18-2016 02:46 PM | |
| diss3ntienc |
Re: fixing small cracks, plus bad epoxy 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! |
| 08-18-2016 12:39 PM | |
| Max |
Re: fixing small cracks, plus bad epoxy I would re-open the break so that you could force epoxy into the gap and then close it back up. Then use a small drill the same diameter of a toothpick and drill into the edge of the balsa on an angle so that it crosses into the other side of the break. Do 2 and also epoxy the toothpicks into the hole. Will make a solid joint once the epoxy has cured. See picture red is one toothpick and blue is the other. |
| 08-14-2016 06:15 PM | |
| Hubert 1 |
Yeah, I guess If I was to use epoxy I would have to use CA debonder. I could epoxy the crack and cout out a bit off the top, than epoxy in a pice of something strong, but thatwould be tricky. I think this is what I will try to do, I can always cut it off if it does not turn out. |
| 08-14-2016 05:44 PM | |
| CF105 |
Re: fixing small cracks, plus bad epoxy It was good enough for me to understand I see what looks like glue stains (CA I expect) around the crack. If you're comfortable doing so, I would suggest cutting out the balsa around the crack and replacing it with fresh wood. That would be the most durable repair. Another option would be to apply a fiberglass patch to either side of the part to reinforce it. Otherwise just adding epoxy or CA to the existing split is only going to create a bond between the old adhesive and the new. |
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