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Foilzone

For all foil kite riders


foilholio
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Foilzone

Postby foilholio » Sat Oct 17, 2015 2:51 am

Is it dead? Can the posts be recovered?

sl2007
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Re: Foilzone

Postby sl2007 » Sat Oct 31, 2015 10:00 pm

No further news about foilzone?

That would be bad news, so much information and history about foil kites in it.

Johhnn
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Re: Foilzone

Postby Johhnn » Sun Nov 01, 2015 1:26 pm

Yes, lots of history and info there. It would be good to have those posts available somewhere, somehow.

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Kamikuza
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Re: Foilzone

Postby Kamikuza » Sun Nov 01, 2015 2:09 pm

I almost miss vervet's posts.... nah, not really.

foilholio
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Re: Foilzone

Postby foilholio » Sun Nov 01, 2015 2:40 pm

he does post here....

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PugetSoundKiter
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Perplexing Pulley Puzzles

Postby PugetSoundKiter » Tue Mar 22, 2016 1:52 am

Losing hope that foilzone.com will come back online so posting (with a few old diagrams) for a little tribal knowledge. Got me a super cheap 17m Speed1. It has a stock mixer (Picture 5) and I understand the modification to a Speed1.5 (Picture 6, same as Speed2 mixer) changes C from 1/3 to 1/2 and, B from zero to 1/6. Today most kites like Speed3,4,5+ use 2:4:2 mixers (Pictures 7,8,9) which I don’t know would be Speed1 canopy compatible with changes of C from 1/3 to 1/2 and, B from zero to 1/4. So, what do you recommend, keep the 17m Speed1 stock or, modify to the Speed2 mixer or, modify to Speed3 mixer?

Bar - Neutral / Sheet-In / Turn-Right
[attachment=8]k1.JPG[/attachment]
Fixed Bridle - Bar
[attachment=7]k2.JPG[/attachment]
Fixed Bridle - Pulley Bar
[attachment=6]k3.JPG[/attachment]
Fixed Bridle - Turbo Bar
[attachment=5]k5.JPG[/attachment]
Depower - Speed1
[attachment=4]k4.JPG[/attachment]
Depower - Speed2
[attachment=3]k6.JPG[/attachment]
Depower - Speed3
[attachment=2]k7.JPG[/attachment]
Depower - Speed3 Top View
[attachment=1]k8.JPG[/attachment]
Depower - Speed3 Side View
[attachment=0]k9.JPG[/attachment]
Attachments
k9.JPG
k8.JPG
k7.JPG
k6.JPG
k5.JPG
k4.JPG
k3.JPG
k2.JPG
k1.JPG
Last edited by PugetSoundKiter on Fri Nov 11, 2016 6:37 am, edited 2 times in total.

foilholio
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Re: Foilzone

Postby foilholio » Tue Mar 22, 2016 7:26 am

Firstly there may be a bit of confusion how to write the ratios for mixers, I am not even sure which is correct without referencing foilzone. I say moving Z 4, say cm, causes C to move 2cm and B 1cm etc, so 421.

The difference between the 421 (2 pulley) and 631(3 pulley) mixers is the amount B is changed. 631 changes B less so will allow higher changes to camber but also require more bar movement to get B to release and depower the kite. It could be dependent on the kite which style of mixer better suits it. I would say the further back B is placed on the kite, like the Pansh A15, the less suitable 631 would be for it, as the bar movement required would be exceedingly ridiculous. One other difference is the reduced ratio on the 631 also reduces the force at the bar. This could present an option for someone to reduce bar pressure on foil kites with 421 mixers. As to performance I think a 421 feels more responsive, probably mainly because of the shorter throw, but the higher camber on a 631 should have performance benefits as it is possible to nearly double the lift out of a wing through camber changes vs AoA, but not with out drag...There is a third option that uses a 421 mixer with a WAC or diablo line. This will give you short throw like a 421 and the camber changes of a 621 mixer, negative being even higher bar pressure than the 421. You could also get the benefit in a such a combined mixer of also combining a stable mixer setting with an unstable one, i.e. benefits of both.

Converting from 421 to 631 and back should be simple. Just make sure your final AB depower point is the same, C pulley line has the same travel ,B has enough travel and ABCZ line up, though you may find each needs a slightly different setting. Flysurfer uses nearly 50% more B pulley line than they need on their 421 mixers, not sure why. If you want to change the AB end point you need to lengthen BCZ or the C pulley line, but make sure B pulley line doesn't then restrict.
Last edited by foilholio on Thu Mar 24, 2016 1:14 am, edited 1 time in total.

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PugetSoundKiter
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Re: Foilzone

Postby PugetSoundKiter » Wed Mar 23, 2016 3:26 am

Great info, gives insight into the pros/cons and possibilities. I’ll adopt the ZCB, 421 / 631 nomenclature and, the 2 pulley Speed1 could be 310. I was using mechanical pulley force multipliers and line dividers to figure differences. The Speed1 Bs are placed forward and close to the As. Camber alterations from Bs might be limited by this. I can see I have some more homework to do, thanks.

foilholio
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Re: Foilzone

Postby foilholio » Thu Mar 24, 2016 12:44 am

Even though B is far forward you can still use a 421 mixer it just may not perform as well as a 631. But as I said you could add a WAC line to limit B and get the same or better performance of a 631 with quite a bit more bar pressure.

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Kamikuza
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Re: Foilzone

Postby Kamikuza » Thu Mar 24, 2016 3:41 am

I was looking forward to the guy posting about resealing the old kites...


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