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LE stitching stretches / is widening. Need to worry?

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FLandOBX
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Re: LE stitching stretches / is widening. Need to worry?

Postby FLandOBX » Tue May 19, 2020 1:21 am

I had a couple of ozone catalysts about 9-10 years ago. Same problem. I hand-stitched the seam to reinforce it. It's simple and effective. If you stitch, use UV resistant thread and be careful not to stick the bladder with your needle (best to remove the bladder before sewing).

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Re: LE stitching stretches / is widening. Need to worry?

Postby Jyoder » Tue May 19, 2020 1:45 am

Did you guys even look at the picture? It’s at the sewn ridge seam. How do you patch over that??
Looks like a few threads popped leaving small needle holes- that’s the holes you see the bladder through, right?

That seem is usually triple sewn anyway. Should be fine as is and the thread probably broke at a tight spot with thread tension too high.

If you’re concerned just use a needle and sail thread to oversew the ridge seam a bit and maybe patch or glue over the needle holes.

But I really don’t think this case is a problem.

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Re: LE stitching stretches / is widening. Need to worry?

Postby PullStrings » Tue May 19, 2020 1:48 am

Some good tips about putting patch on the inside

We don't know how far your problem is from LE bladder opening

It may be unreachable to install patch

If you are scared that the bladder once inflated will stick to the outside Tear Aid patch here is a tip

Clean the whole area with Isopropyl & let dry
Then pump the kite to 1.0 PSI less than normally when you would kite

With tapered artist brush apply baby powder only on the inside of the separated seam area making sure it coats the bladder

You don't need to put much
Just narrow clean line


Then deflate kite fully and using a totally flat back surface apply the 2 tear aid patches
1.5 in then after over top a 3.0 in

Make them circular
Peel off exactly in half creating half circle
Use tip of small scissors to peel off
Don't use fingers
The glue on patch is extreme
No room for error
Line up the patch half centerpoint exactly in the middle of the baby powder line
Press down the 1st half down on casing
Open up the other half of patch and press down

Repeat same steps using the bigger patch
Install exactly over the 1st one
It will overlap it exactly by 3/4 in. all the way around

Press both down together with maximum to get pressure

The bond will immediately be at 90%
And will reach 100 % after one hour

I have done a good dozen of those outside smallish casing stitch repairs with no failures yet

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Re: LE stitching stretches / is widening. Need to worry?

Postby Jelle_vw » Tue May 19, 2020 7:46 am

Thnx again everyone for your replies and advices.
I will go with the tear aid on the inside of the dacron/casing.

I will let you know how it went and share some pictures.

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Re: LE stitching stretches / is widening. Need to worry?

Postby Jelle_vw » Tue May 19, 2020 10:58 am

Just got a reply from my local (repair) kite shop.
They can stitch it again for 15 -20 euros.
I think I will do that first.

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Re: LE stitching stretches / is widening. Need to worry?

Postby Jelle_vw » Sun May 24, 2020 10:50 am

So I went to my local shop but new stitching would be more then they indicated, 65 euro.
And they found another worn spot on my LE Dacron and advised to stitch a reinforcement on that also for another 65 euro.
I decide that 130 euro is to much for an old kite that probably needs another repair next year.
So I'm back to the Tear Aid type A patch.

I required a piece of Tear Aid type A but find it very stretchy.
Should I not use something more rigid/stiff for additional strength and support of the LE?
I feel like the Tear Aid type A will give in to much allowing the stitching to rip open the Dacron further.

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Re: LE stitching stretches / is widening. Need to worry?

Postby FLandOBX » Sun May 24, 2020 12:53 pm

Jelle_vw wrote:
Sun May 24, 2020 10:50 am
So I went to my local shop but new stitching would be more then they indicated, 65 euro.
And they found another worn spot on my LE Dacron and advised to stitch a reinforcement on that also for another 65 euro.
I decide that 130 euro is to much for an old kite that probably needs another repair next year.
So I'm back to the Tear Aid type A patch.

I required a piece of Tear Aid type A but find it very stretchy.
Should I not use something more rigid/stiff for additional strength and support of the LE?
I feel like the Tear Aid type A will give in to much allowing the stitching to rip open the Dacron further.
Tear Aid is not designed for this type of repair. As you've noticed, it stretches. It is appropriate for bladder repairs, but not a seam repair on the leading edge. As your local shop advised, stitch it. Hand stitching is very easy. Takes a bit of time, but it is the correct way to repair loosening stitches. I'm always amazed how everyone wants to use Tear-Aid for every kite repair. :roll: Take the time to do it right. Hand stitch it and you'll have a repair that will last (plus it's a lot more economical than a roll of Tear-Aid).

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Re: LE stitching stretches / is widening. Need to worry?

Postby Windigo1 » Sun May 24, 2020 1:00 pm

Just put a little bit of Marine Goop on it! I repaired many small holes and stitching on kites with that stuff it will last forever and never come off.

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Re: LE stitching stretches / is widening. Need to worry?

Postby PullStrings » Sun May 24, 2020 1:38 pm

Your repair is quite small
Yes single patch of Tear Aid A stretches too much
That's why you need to stack them
Stack 3 of them on top one an other instead of just 2
Make 3 round patches
1.00 inch
1.75 inch
2.50 inch
Center the 1.00 inch first over area
It will barely stretch once all 3 are applied
Will last forever
Problem area won't widen anymore
Peace of mind
Inexpensive
Been doing this for years successfully

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Re: LE stitching stretches / is widening. Need to worry?

Postby Ozone Kites AUS » Tue May 26, 2020 6:32 am

Jelle_vw wrote:
Sun May 24, 2020 10:50 am
So I went to my local shop but new stitching would be more then they indicated, 65 euro.
And they found another worn spot on my LE Dacron and advised to stitch a reinforcement on that also for another 65 euro.
I decide that 130 euro is to much for an old kite that probably needs another repair next year.
So I'm back to the Tear Aid type A patch.

I required a piece of Tear Aid type A but find it very stretchy.
Should I not use something more rigid/stiff for additional strength and support of the LE?
I feel like the Tear Aid type A will give in to much allowing the stitching to rip open the Dacron further.
Is that the worst of the "combing" as it is known in the industry? If it is just leave it alone you will not have any issue.
Definitely do not put any glues directly onto the dacron, this will make it impossible to repair your kite and will not add much strength if any. Do not use Tear aid it is not designed for that application. If you can reach that seam area through the bladder access zipper you could put a piece of stickyback dacron cloth over the area but I do not think it is worth the effort. There is already a layer of stickback dacron on the inside which Ozone applied when they built the kite. Ozone has since modified the leading edge seam so that stickback dacron is applied to both sides, on the inside, before the leading edge is sewn closed. The combing on your kite though is already on the side that has the stickyback dacron (also known as insignia tape). Ozone has also since changed from using Dimension Polyant dacron, to Teijin dacron, they did this because the DP dacron softened too much, but also due to Teijin developing better dacron specifically for kites.
Combing occurs on all kite to some degree, its a natural part of sewing a bladder from super low stetch materials and then inflating it to a fair amount of pressure and also the natural forces that occur on a leading edge tube, which is that it twists when the kite is turned hard or relaunched, but also from shock loads when the kite is crashed.

If you apply any sort of glue and patches to the outside of the LE you will have destroyed your kite from the perspective of getting a repair done in that area for any reason as the glue will prevent a repairer from unpicking the threads and getting the leading opened so that a proper repair could be done.
I'm the Ozone importer in Australia and have been servicing and repairing inflatable kites for 22 years.


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