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Author Topic: Repairing cabon tubes  (Read 1409 times)
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iwannafly
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« on: April 29, 2010, 04:37 PM »

 I fixed a 5PT Lower Spreader that split length ways from where it connects to the center "T". I spread the crack and filled it with Crazy Glue and clamped it closed.

 I then used a piece of heat shrink tubing the same length as the crack. I added another piece of heat shrink tubing about an inch long right at the end of the spreader where it connects to the "T". I doubled it up to make it as strong as possible at the weakest part of the crack.

I flew in very gusty, and at times, very strong winds today and seems to be holding.

I think this could be done as a field repair. The crazy glue tube is very small and the heat shrink tube will fold flat. All that is left is a lighter to heat the tubing to shrink it. Only problem is finding a place out of the wind to keep the lighter going.

Does any one else have any other solutions for mending snapped or cracked rods? 
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thief
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« Reply #1 on: April 29, 2010, 04:42 PM »

in my past experiences it is better to not try to repair those rods.   they just break again.  carry more rods!!!

I do know that some guys have wrapped the rod with thread andthen coated the thread with zapagap glue. sort of like how the guides are put onto a fishing rod. 

let us know how yours lasts!
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Kites kayaks & corgis again!!!
JimB
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« Reply #2 on: April 29, 2010, 09:13 PM »

Replace it or you are going to wish you had..
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Allen Carter
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« Reply #3 on: April 29, 2010, 09:39 PM »

Best case scenario is the split grows and the rod stays in place but gets realy bendy. Worst case is the rod comes off the center T and rips up your sail.

I've wrapped sul sticks with thread when there were no more replacements available but it was a 0-2 MPH kite.  Very little stress.
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Allen, AKA kitehead
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« Reply #4 on: April 29, 2010, 10:21 PM »

Best case scenario is the split grows and the rod stays in place but gets realy bendy. Worst case is the rod comes off the center T and rips up your sail.

Cheaper to replace a rod than a sail
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"Wind to your back, Kite in the sky."

MikeM
Brookings, OR  - KP 4-11

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#518  -    #110883 -

mikenchico
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« Reply #5 on: April 30, 2010, 01:18 AM »

As a field repair like you stated and you really want to continue to fly your fix is about as good as you could do. Like everybody says though, replace the spar ASAP. Damage to the spar may extend further then you can see or there may be damage in another area, in either case the spar has been weakened and the likelyhood of another failure increased.

Another possible "field repair": if it's a clean break, not a long split is an internal ferrule glued in, that wouldn't have worked in your case unless you could've knocked the ferrule out of the other spreader and glued it into the split side. Again though replace the spar ASAP.

We could help you list out a proper field repair kit with spare rods and all but as you get more kites you'll just leave it at home and fly something else anyway  Wink

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"Living is easy with eyes closed, misunderstanding all you see" John W Lennon

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iwannafly
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« Reply #6 on: April 30, 2010, 06:20 AM »

Rest assured, I do have an extra rod and will switch to it before I fly again.

When I tested the fixed rod, I inspected it every time the kite came in contact with the ground.

I am going to replace the spreader with the new one and keep the repaired one as a back-up until I can get a few more spares. That way I can still fly a bit longer, even if not as hard.

Last thing I need is a rip in my sail.

Thanks for the advice.
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tcope
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« Reply #7 on: April 30, 2010, 10:04 AM »

That is better then the 3 layers of duct tape and 6 tie wraps I saw on a lower spreader this past weekend. There was more.... but I could not look. Person said he had modified it for heavy winds. I gave him some wind tamers.
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Todd Copeland
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« Reply #8 on: April 30, 2010, 03:34 PM »

As an emergency repair, the thread/CA route is probably best. Again, just temporary. If you really want to be safe though, Kevlar thread wraps soaked in thin CA can be used for a little longer day.
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Asfink tersez wot....

Exactly! Party on, Garth!
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