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CA v.s. Nylon hinges

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Old 07-05-2007 | 08:40 PM
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Default CA v.s. Nylon hinges

My hinges have come off on my TF P-47, I didn't build this kit. on the kit, should I use Ca hinges or stick with the nylons?

Any tips would help. thanks, dave trimmers
Old 07-05-2007 | 08:47 PM
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Default RE: CA v.s. Nylon hinges

I'd vote for a good quality nylon steel pinned hinge. Pin the hinge into the surfaces also.

What do you mean they came off? Did they pull out of the slots or break or what? Vague.
Old 07-05-2007 | 08:51 PM
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Default RE: CA v.s. Nylon hinges

would dubro qualify as good quality, because a couple have broke on me under minimal effort.

the hinges were improperly glued and was able to pull most of them out after a couple vibrated out on engine test runs.
Old 07-05-2007 | 09:24 PM
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Default RE: CA v.s. Nylon hinges

http://www2.towerhobbies.com/cgi-bin...&I=LXD940&P=SM
Yeah, they should be fine. Do NOT use CA on these hinges as it can make them brittle. Use epoxy or better yet http://www2.towerhobbies.com/cgi-bin...&I=LXCX67&P=ML Hinge Glue. Pinning them into place is always a safeguard. Drill a small hole trough the wood and hinge and put a drop of glue on a round toothpick and stick it through the hole. When dry cut off flush.
Old 07-06-2007 | 12:04 AM
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Default RE: CA v.s. Nylon hinges

the dubro ones are not too bad at all, as well as the CA hinges that come with the kit.
I do realize you didn't build it but most ARF's come with CA hinges so if you have some of them as extras then they are OK to use.
another option is to use Robart hinge points there the ones I am using on my TF P-47 they are strong and when properly installed there pretty much bullet proof.
Bruce made a suggestion that you should go with if you chose the Dubro type.
pin them in place when you do this there not likely to come out ever, if you still have the Dubro's that came with the model and there loose and seem to be worn out then replace them for sure.
if there OK looking then RE-glue them in with some epoxy and pin em in place,when you do put some petrolium jelly at the hinge point so the epoxy doesn't glue them stiff,if you didn't already know that.
Old 07-06-2007 | 06:59 AM
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Default RE: CA v.s. Nylon hinges

Thanks guys, I'll check them and repin them properly.

thanks,dave trimmer
Old 07-06-2007 | 07:07 AM
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Default RE: CA v.s. Nylon hinges

Dave: As I have posted on other threads, I use CA hinges, but I learned very early on that you must NOT apply the CA twice. What I mean by that is once you have the hinges placed and centered, I put a pin in the center of the hinge just to hold it centered ( if you are using the ones with the wick slot, then put a pin on either side of the slot to hold it centered so that both sides (aileron, for instance and wing TE) have equal amount of CA hinge inserted in the slot. Then, flex the hinge surface so that you are sure you have movement. (of course, do this for all hinges on that surface... that is, pin then flex). Make sure you have adequate clearance. You can seal any gap you may have later on if you wish.

Once you have done this and are totally satisfied that the hinges are equally inserted in each side, and that they offer the best flexibility and up and down movement, then get ready to apply the CA.

Flex the hinge down all the way, but not enough to pull the hinges out of the surfaces. Apply 5 or so drops of CA to each hinge on that side. Flex the hinge a few times. It will wick in right away and pretty much set up immediately.

Next, turn the surface over, flex the hinge down as far as you can without stressing it, then apply 5 or so drops of CA to each hinge.

THAT'S IT. Don't re-apply CA to any of those hinges. If you do, you can be certain that at some point, they will become unbonded and pull out. I've had it happen on my Tiger 60. I learned this AFTER I CA'd the darn hinges. Sure enough, about three or so weeks later, the hinges started to pull out. I had to cut them all out and re-hinge. I still have that Tiger 60, by the way, and the re-hinge job still holds, and holds very nicely.

Hope this helps.

DS.

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