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HomeAircraftHelicopterHelicopter Main Discussion › Gluing Carbon?
04-25-2009 06:44 AM  9 years agoPost 1
Ghostrider

rrElite Veteran

San Diego, CA

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Doing some pre-weekend inspections and I noticed my frame is slightly cracked from a crash last week on my 700. It's thankfully in a place that has little or no stress at all.

What should I use to glue it?

I have some JB Weld and 30 min epoxy lying around if that will work.

Thanks in advance for the input.

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04-25-2009 06:48 AM  9 years agoPost 2
jake26

rrApprentice

central cali

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I have the best luck by roughing it up with some sand papper the laminating a scrap piece of cardon behind it with thick CA

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04-25-2009 06:50 AM  9 years agoPost 3
sharam

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Northern California - Fly at Morgan Hill Field

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I would use epoxy. I would also install a cross brace with a couple of small bolts, nuts, and washers.

I did this fix on one of my helis almost four years ago and it has held up quite well.

Verba volant, scripta manet

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04-25-2009 07:48 AM  9 years agoPost 4
what_the_helli

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cookeville, tn USA

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epoxy is what the impregnate the carbon fiber cloth with to begin with so thats my choice

I put the fun in dysFUNctional :)
Team KBDD & Funding by TnPrintMasters.com

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04-25-2009 08:07 AM  9 years agoPost 5
Bru

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Leicestershire, England

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Both Epoxy and CA will work if clamped properly, The trick is in the preperation, degrease, abrade, clean with solvent.

Andy.

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04-25-2009 09:38 AM  9 years agoPost 6
OICU812

rrMaster

Edson, Alberta, Canada

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I have fixed a fair share of plastic and cf frames with JB weld with no issue. Also if you need to re enforce a specific area that is not visible but you want it strong I found using some dental floss around wet uncured JB weld and wrapping it in tight then re coating after a few mins of curing with fresh JB acts like rebar rods in conrete and really adds strength.

...Once upon a time there were Nitros, flybars and frequency pins...

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04-25-2009 10:23 AM  9 years agoPost 7
what_the_helli

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cookeville, tn USA

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dental floss and JB Weld....hmmm, even sounds strong
Just when you think you have heard it all...

I put the fun in dysFUNctional :)
Team KBDD & Funding by TnPrintMasters.com

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04-25-2009 12:11 PM  9 years agoPost 8
heli-cuzz

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Pittston, Pa. USA

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I have fixed a fair share of plastic and cf frames with JB weld with no issue. Also if you need to re enforce a specific area that is not visible but you want it strong I found using some dental floss around wet uncured JB weld and wrapping it in tight then re coating after a few mins of curing with fresh JB acts like rebar rods in conrete and really adds strength.
+1

I've used the dental floss JB Weld method. Works great.

Fury 55 NIB Furion6 CGY750 fbl helicopter-Frenzy CGY750 fbl nitro-Frenzy fbl NOBAR90

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04-25-2009 01:10 PM  9 years agoPost 9
bclong211

rrApprentice

Columbia ,SC

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+2 for jb and dental floss. I have found with frame cracks the repair holds better with jb weld. If you have the room or space then don't use the floss just laminate it on one or both sides with a scrap piece of cf cut to match and clamp with jb between. I let it ooze out and then shve off the excess when it is about 2-3 hours old. I would NEVER use epoxy on cf. I have had poor results with that because of the nitro oil eating away at it.

I meant to do that!!!

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04-25-2009 01:15 PM  9 years agoPost 10
aussie_g

rrVeteran

Travelers Rest, South Carolina, USA

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this is why I always keep a broken side frame around, you never know when you need to cut off a small chunk..

Gareth

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04-25-2009 01:15 PM  9 years agoPost 11
LONEWOLF2440

rrElite Veteran

MYRTLE BEACH S.C

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Darn i like the dental floss and jb weld

MIKADO LOGO 600 TREX 550

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04-25-2009 01:52 PM  9 years agoPost 12
AltecLansing

rrElite Veteran

North Carolina

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Wasn't there an article on this in rc heli mag? Glue a piece to the broke area like a splint and drill a couple of holes and bolt it together. Can't come apart then.

Man, I miss the eighties.

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04-25-2009 02:29 PM  9 years agoPost 13
Tmblewd

rrVeteran

Phoenix, AZ

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You can also use the CA with baking soda. The baking soda will become a part of the repair. It works really well on fiberglass.

Semper Fidelis

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04-25-2009 02:37 PM  9 years agoPost 14
DougsRC

rrProfessor

Mass.

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I use Kevlar thread,wrap it and saturate with thin CA for plastic and carbon. Doesn't look pretty but is a Very strong repair.

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04-25-2009 02:47 PM  9 years agoPost 15
Ghostrider

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San Diego, CA

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Wow, thanks for the great suggestions!

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04-25-2009 04:27 PM  9 years agoPost 16
GMPheli

rrElite Veteran

W. Bridgewater, MA USA

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"I would NEVER use epoxy on cf. I have had poor results with that because of the nitro oil eating away at it."

You must've had some bad epoxy because it is fuelproof

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04-25-2009 04:52 PM  9 years agoPost 17
Sillyness

rrVeteran

Little Rock AR

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When epoxy cures it releases a sort of wax that makes it difficult for new epoxy to stick to it unless it's cleaned VERY well. I've never had the best luck getting expoy to stick to itself.

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04-25-2009 05:31 PM  9 years agoPost 18
Aox

rrApprentice

Irvine, CA

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I've quite a few carbon rod/parts with thread/ca. CA impregnates the thread and turns it into plastic. A little lighter than JBWeld, but probably not as strong. I've fixed many a micro this way. Wrap the break in thread, then wick CA into it.

Broken frame, I'd just bolt more Carbon onto it for a brace.

-Aox

Synergy N9~/~Trex250-450-600N~/~Logo 500 3D~/~Rave 3D~/~Mini-Titan A109K2
AMA #902257 - OCMA

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04-25-2009 06:16 PM  9 years agoPost 19
jking

rrApprentice

artesia,new mexico

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in my opinion thin ca is the best for laminating carbon.it allows it to wick into the fiber just rough it up a bit.

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04-25-2009 06:26 PM  9 years agoPost 20
ch-47c

rrElite Veteran

san jose, ca

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I've used floss and CA and epoxy. I use the non-waxed kind and non-flavored. I know it's not minty fresh, but it works well.

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HomeAircraftHelicopterHelicopter Main Discussion › Gluing Carbon?
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