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Adhesive Advice
I'd like some help choosing the best adhesive for a repair. I purchased a nice Brio and after about 50 flights I noticed the gear plate assembly has started to come loose around a glue joint allowing the left side to slide around. There is no dammage to the structure so I would like to clean it up and use the right adhesive to make a permanent repair before there is some real damage done. I have repeatedly flushed the area with methanol and am relatively sure it is clean. What should I use for an adhesive? I was thinking thin CA
would do the trick as there is no gap anywhere and then maybe a gussett of exoxy with fibers. I want this to be permanant. Your expert advise will be greatly appreciated. Thanks, RC |
RE: Adhesive Advice
Rick my friend
Probably would help if we knew the materials. Like plywood to balsa for example. ;) |
RE: Adhesive Advice
Try HYSOL , a Loctite Product (E-120 HP) P.N. 29353, available from Grainger. It is an ultra-strong, non-sag,aerospace grade epoxy with 120 min. work life. It comes in a hardener/resin dual dispenser which requires a special gun applicator. The glue cost about $30, the applicator is an additional expense. I borrowed the applicator from a friend who told me that some of the IMAC guys use this stuff.
On my Brio, I removed the gear plate and the quarter moon-shaped ply braces . I very carefully ground off the old white adhesive inside of the fuse using my Dremel and also removed the old glue from the plywood braces.I reinforced the braces on both sides using carbon fiber and resin. Vacuum the fuse inners, clean with rubbing alcohol and then run your beads of Hysol. Re-install the braces and gear plate .The repair should be near bullet proof. I have since put on 125 Plus flights from a grass, bumpy field. No issues at all. If you use other types of epoxy, even re-inforced with milled glass, you may not have the same level of strength. Frank |
RE: Adhesive Advice
Rick, Frank is correct. You could also use Loctite Hysol 9462 (Slow Cure) and Hysol E-20HP (Fast Cure). Both as Frank said require a special caulking type gun. I have one not cheap. BVM also sells a similar epoxy and they also sell the gun and glue tips.
You could also mix up some regular epoxy and mix in carbosil or any other epoxy thickener (fiberglass stands). Don't use micro balloons. Good Luck. |
RE: Adhesive Advice
ORIGINAL: F.Imbriaco Try HYSOL , a Loctite Product (E-120 HP) P.N. 29353, available from Grainger. It is an ultra-strong, non-sag,aerospace grade epoxy with 120 min. work life. It comes in a hardener/resin dual dispenser which requires a special gun applicator. The glue cost about $30, the applicator is an additional expense. I borrowed the applicator from a friend who told me that some of the IMAC guys use this stuff. On my Brio, I removed the gear plate and the quarter moon-shaped ply braces . I very carefully ground off the old white adhesive inside of the fuse using my Dremel and also removed the old glue from the plywood braces.I reinforced the braces on both sides using carbon fiber and resin. Vacuum the fuse inners, clean with rubbing alcohol and then run your beads of Hysol. Re-install the braces and gear plate .The repair should be near bullet proof. I have since put on 125 Plus flights from a grass, bumpy field. No issues at all. If you use other types of epoxy, even re-inforced with milled glass, you may not have the same level of strength. Frank Frank is on the money.... The only thing I would add is after grinding the old filled epoxy fillets out of the fuse, to make sure and sand the whole area with coarse paper such as 80 to 100 grit. The epoxy needs to have some bite and just cleaning may not do as thorough a job as needed. This is the highest of stress areas in any fuse I found out the hard way in my Brio fuse that they may have used a wax on their peel ply or the wrong kind of epoxy during lay-up. A couple of blocks I had installed in my fuse for the wing bolts, popped off. The area had been cleaned and moderately scuffed but I still had a problem. That's just unnecessary aggravation |
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