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by GregK
Sat Jun 16, 2018 5:47 pm
Forum: Kitesurfing
Topic: Kite Inflation Tips (Cabrinha Kitesurfing)
Replies: 14
Views: 9408

Re: Kite Inflation Tips (Cabrinha Kitesurfing)

Surprised he didn't fully unroll his kite before starting to pump. Doing the auto-unroll by pumping risks pinching and popping a section of your LE bladder - doesn't happen frequently, but do the auto-unroll enough times and you will at some point miss a session with a popped bladder. Repaired enoug...
by GregK
Sun Jun 03, 2018 1:57 am
Forum: Kitesurfing
Topic: Bladder repair on RRD Obsession 10.5 mk8(2016)
Replies: 9
Views: 4134

Re: Bladder repair on RRD Obsession 10.5 mk8(2016)

For a first bladder repair you are into it deep. If you have knowledge or experience with welding or bonding plastics ( the bladder is made from thermoplastic polyurethane ) welding up an end won't be too difficult. TPU film was originally developed to thermally bond to woven nylon or polyester fabr...
by GregK
Mon May 28, 2018 9:37 pm
Forum: Kitesurfing
Topic: Good bar suggestion
Replies: 18
Views: 6986

Re: Good bar suggestion

Adjustable stopper on the OR Stickshift bar is solid ( won't slip ) but still easy to adjust, provided it's within reach of course.
by GregK
Mon May 28, 2018 7:48 am
Forum: Kitesurfing
Topic: Bladder repair on RRD Obsession 10.5 mk8(2016)
Replies: 9
Views: 4134

Re: Bladder repair on RRD Obsession 10.5 mk8(2016)

This style of single fast inflate & dump when the entire plug is removed is called a Boston valve. Typically it's secured on the inside perimeter of the valve shoulder with a ring of Velcro. Sometimes the manufacturer will have the kite factory put a little webbing pull tab sewn onto the side of thi...
by GregK
Sun May 27, 2018 6:41 pm
Forum: Kitesurfing
Topic: Tips and Tricks to Repair Kites - add your experience!
Replies: 308
Views: 133077

Re: Tips and Tricks to Repair Kites - add your experience!

Damaged bladder film inside the red marker rectangle is cut away and a piece of new bladder film slightly larger than the cut-out is thermally welded over top. The weld is 1/4-inch wide all around the perimeter of the cut-out, just outboard of the red line. 20% of the combined lap joint thickness is...
by GregK
Sat May 26, 2018 6:21 pm
Forum: Kitesurfing
Topic: Tips and Tricks to Repair Kites - add your experience!
Replies: 308
Views: 133077

Re: Tips and Tricks to Repair Kites - add your experience!

Some pictures of a recent welded LE bladder patch. The blow-out was at the edge seam, so a TearAid patch, which usually end up leaking along the edge seam, wasn't a good repair option. Pictures are taken right after a soapy water leak check of the patch. http://i766.photobucket.com/albums/xx307/Greg...
by GregK
Tue May 08, 2018 1:37 pm
Forum: Kitesurfing
Topic: Are Pulley bridles more tolerant to stretch/shrink?
Replies: 26
Views: 9187

Re: Are Pulley bridles more tolerant to stretch/shrink?

Sandras, apologies if you felt under attack, not my intention at all. I agree with some of what you have said, but other statements I don't, for the reasons stated. And you did request comments & feedback. Yes your vector analysis, I agree with it, no need to horizontally hang a pound. Vector analys...
by GregK
Mon May 07, 2018 9:24 pm
Forum: Kitesurfing
Topic: Are Pulley bridles more tolerant to stretch/shrink?
Replies: 26
Views: 9187

Re: Are Pulley bridles more tolerant to stretch/shrink?

Again, my understanding is: I assume as the AoA increases these A1 and A2 get loaded more and more. I wouldn't remove them. They are unloaded when depowered and sheet out. But you are so certain from your vector analysis that A2 is very lightly loaded, so just remove A2. I'm certain that A1 is load...
by GregK
Mon May 07, 2018 9:11 pm
Forum: Kitesurfing
Topic: Are Pulley bridles more tolerant to stretch/shrink?
Replies: 26
Views: 9187

Re: Are Pulley bridles more tolerant to stretch/shrink?

the CoM (center of moment) Define center of moment please, not familiar with that term. If you are meaning the centre of the mass then that point is fixed on a solid/rigid object. If when sheeting in the wingtips come forward ( i.e. kite is rotating about a point up near the top/centre ) then the u...
by GregK
Mon May 07, 2018 7:26 pm
Forum: Kitesurfing
Topic: Are Pulley bridles more tolerant to stretch/shrink?
Replies: 26
Views: 9187

Re: Are Pulley bridles more tolerant to stretch/shrink?

Vector analysis on real picture /experiment show that a2 does not carry load, because if it would a1 and al1 would not be parallel! Looking at that picture of the kite and bridle, definitely agree that A2 does not carry any significant load and could be eliminated; LE of the kite is likely stiff en...

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