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Hinge Fixing?

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Roger Dyke29/01/2019 19:37:37
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209 forum posts
10 photos

Hi All,

What is the general consensus of gluing hinges into balsa wings etc.

I am talking about the plastic flat pinned hinges about 3/4" wide for about 40 sized models.

What is the best glue to use?

Should they always be pinned?

Your thoughts please.

Trevor29/01/2019 19:46:40
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365 forum posts
52 photos

Epoxy them in, one half at a time. Apply the epoxy to the slot with a piece of thin piano wire, clean off the excess, push the hinge in until there’s about 3mm to go, then smear the hinge pin with oil before pushing it fully into position.

I never pin hinges and have yet to have any come loose, but then again, I fly electric so they aren’t subject to the ravages of fuel and vibration.

Trevor

CARPERFECT29/01/2019 19:47:26
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470 forum posts
6 photos

Super glue , or no glue just drill through trailing edge and hinge then wood glue a cocktail stick in. when dry , cut level with nail clippers. then a dab of clear nail varnish to seal if using i.c.

Ray Wood 429/01/2019 19:48:25
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65 forum posts
7 photos

Hi Roger

Cross drill 1/16" an cocktail sticks cyano in place, works for me 😀

regards Ray

Edited By Ray Wood 4 on 29/01/2019 19:49:16

Roger Dyke29/01/2019 20:03:24
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209 forum posts
10 photos

Trevor and CARPERFECT: Thanks for your suggestions.

Ray: Thank you too. Can you please explain what you mean by "cross drill 1/16"?

John Duncker29/01/2019 20:11:08
79 forum posts
7 photos

I like fuzzy mylar hinges.

Wax crayon on the hinge like both sides

When they are in the right place drill from underside with a 1/16th drill trying to stop before it showed on the top side.

Apply one drop of thin cyano.

Clip the tip off a cocktail stick. Apply 2 drops of thick slow cyano and push in till just through the hinge.

Clip the excess off and push in till flush.

The OCD amongst us can cover the end with a tiny piece of film.

At the club I used to fly with it was a safety inspection item that all mylar hinges were pinned.

John Duncker29/01/2019 20:17:28
79 forum posts
7 photos

Maybe I should make it clear that the cyano is added to the drilled hole.

GrahamWh29/01/2019 20:17:47
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356 forum posts
53 photos

I do similar to Trevor, but before pushing home the final 2 or 3 mm I wipe the joint with ethanol to remove any epoxy that might touch the hinge joint. I don't oil the hinge but smear the hinge pin and contacting hinge joint parts beforehand with silicon grease. Of course I make sure it will all fit fine beforehand by hinging without glue first.

Roger Dyke29/01/2019 20:18:04
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209 forum posts
10 photos

John: Thanks for the info. on mylar hinges. I have never used these before. Worth a thought though. I might have a look at those.

Edited By Roger Dyke on 29/01/2019 20:18:50

Roger Dyke29/01/2019 20:20:32
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209 forum posts
10 photos

Graham: Good tips. Thanks for that.

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