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by foam-n-fibre
Tue Feb 13, 2018 12:31 pm
Forum: Kitesurfing
Topic: Gasping for breath after crash?! Breathing how to?
Replies: 30
Views: 3309

Re: Gasping for breath after crash?! Breathing how to?

Are you talking about crashing hard and being winded and unable to breath normally due to the impact? That's what I got from the question, but not from the answers.

Peter
by foam-n-fibre
Tue Jan 23, 2018 12:42 am
Forum: Hydrofoil Builders
Topic: First foilboard mod
Replies: 12
Views: 3362

Re: First foilboard mod

As for the Chinook boxes, I can tell you from windsurfer building that they are the strongest boxes. Other fin boxes generally are much weaker. If you head over to a SUP building forum you will see guys telling people to ditch the flimsy other surf brands and use the Chinook boxes. If you have any f...
by foam-n-fibre
Tue Jan 23, 2018 12:20 am
Forum: Kitesurfing
Topic: choosing twin tip size you give more importance to your weight or how much you are overpowered or underpowered?
Replies: 23
Views: 3689

Re: choosing twin tip SIZE you give more importance to your weight or how much you are overpowered or underpowered?

Board is by weight. Kite boarders have this really screwed up in the thought process. The only way I would recommend a smaller board vs your weight is if you like doing board offs. In this instance your probably riding a larger kite for longer hang time and it's easier to toss the board around. A l...
by foam-n-fibre
Sat Jan 20, 2018 3:53 am
Forum: Kitesurfing
Topic: Leash carabiner opening after unhook trick?
Replies: 17
Views: 3632

Re: Leash carabiner opening after unhook trick?

Yes, I have had this happen a few times over the years. One solution is to not have 2 hard loops connecting to each other. Put a short soft webbing or rope loop in between the two hard loops and I think this will either be prevented or the risk of this happening will go way down.

Peter
by foam-n-fibre
Sun Dec 31, 2017 12:40 pm
Forum: Hydrofoil
Topic: Wrap alu mast with carbon fiber for stiffness
Replies: 13
Views: 1537

Re: Wrap alu mast with carbon fiber for stiffness

For someone who is stressing things more than most people, if you were to go with a foam core at very least you'd want a really good hardwood or carbon stringer in the centre. If the foam can compress you can start to have your cross-section thickness reduce, which then allows more bending than if i...
by foam-n-fibre
Sat Dec 16, 2017 1:09 pm
Forum: Hydrofoil Builders
Topic: Mast/Strut Fiber Angles
Replies: 30
Views: 1940

Re: Mast/Strut Fiber Angles

That windsurf mast article I don't think it very scientific. It's just a guy taking a semi-educated guess. A windsurfing mast in torsion? Torsion is twisting. The sail is not rigidly bonded to the mast. Only friction can apply any torsion on a windsurfer mast. If you have a cylinder in torsion (twis...
by foam-n-fibre
Sat Dec 16, 2017 1:31 am
Forum: Hydrofoil Builders
Topic: Mast/Strut Fiber Angles
Replies: 30
Views: 1940

Re: Mast/Strut Fiber Angles

I'll be interested to hear the results of adding fibers at 60 degrees if you think that is the solution. But just to be clear, I'm a mechanical engineer and have a pretty good idea about the physics here, and I can't understand why an angle this sharp would be the solution. This is not exactly my fi...
by foam-n-fibre
Fri Dec 15, 2017 3:51 am
Forum: Hydrofoil Builders
Topic: Mast/Strut Fiber Angles
Replies: 30
Views: 1940

Re: Mast/Strut Fiber Angles

I'm not talking about the weight of the carbon on the scale, I'm talking about the unit weight of the carbon. So 200g or 6 oz of carbon is 1 layer of 200g/m2 of cloth, regardless of the surface area you are covering. Sorry, I thought that was obvious from my description. I'm with you Plummet, I've a...
by foam-n-fibre
Thu Dec 14, 2017 3:41 pm
Forum: Hydrofoil Builders
Topic: Mast/Strut Fiber Angles
Replies: 30
Views: 1940

Re: Mast/Strut Fiber Angles

^Than what's my layup? An ultralight? A feather light? :) Downunder, what is your layup then? Are you saying you have less than 800g per side? That would be less than 4 layers of 6oz (200g) cloth per side. If so then what is your core? I think the layers that I wrapped around my leading edge were n...
by foam-n-fibre
Wed Dec 13, 2017 9:44 pm
Forum: Hydrofoil Builders
Topic: Mast/Strut Fiber Angles
Replies: 30
Views: 1940

Re: Mast/Strut Fiber Angles

bacon2109, Do I understand correctly from the link you provided that you have a total of 800g or 24oz of carbon on each side of your core? I think that's a light layup, and I don't think you are going to make it stiffer with fibers at 60 degrees. I think you should get some unidirectional in there. ...

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