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 Post subject: North 4-line bar safety diagram?
PostPosted: Tue Jul 01, 2014 2:30 pm 
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Anybody have a DETAILED diagram or photo of the line setup on the North 4-line trust bar? I need to know how the sliding depower line is set up with the stopper ball, ring etc. Got mine used and previous guy had it set up completely wrong, or maybe converted from 5-line but didn't know what he was doing. I can't find a detailed enough picture online. Any help or a photo of the "Y" junction would be greatly appreciated. Thanks!


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 Post subject: Re: North 4-line bar safety diagram?
PostPosted: Tue Jul 01, 2014 2:38 pm 
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Whoa, I just found this in another post on Q-lines

edt wrote:
i believe the [North] 2011 quad bar doesn't have any lines that go thru a safety system <--- this is the single most important thing to worry about when using q-power. Single center line safeties usually go thru a tiny opening and the knot of the q power line won't fit.

20111 quad I believe depowers to both center lines high up on the leaders so you should be able to just buy........ <<<snip>>>
That's how bar is set up! I couldn't believe it's right cause "depowering" would have the kite flying on the 2 front lines. Can anybody confirm or deny? What a crappy safety system.


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 Post subject: Re: North 4-line bar safety diagram?
PostPosted: Tue Jul 01, 2014 5:22 pm 
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Location: Hood River
Our 2011 quad bar safety drops to a single red line that travels up about 5m to the "Y" where it flags the kite onto both front lines. All of our 4-line kites are designed in such a way that when you release to both front lines, the front connection points slide towards each other in the middle and the kite will drop onto its nose, similar to a 5-line safety.

Years ago we tested a safety that dropped to a single front line, but we found that some kites would go into a 'death spiral' when released onto a single front line. I am aware that many other brands now use the single-front-line system without a hitch, so my guess is that there's been some sort of general progression in kite design so that modern kites don't have this issue. Please don't respond to this thread with 'my brand x kites release perfectly on single front line stop bashing single front line'. I understand that there are advantages to a single front line release and I know that it works with many other brands' kites perfectly well. We have simply designed our kites around a dual-front-line release, and it works just as well for our kites as the single front-line system does with other brands' kites.

I don't have official specs for line lengths, as it can be very complicated considering that when you account for knots and stretching (we cut our lines under load) the lengths of each individual line are very odd sizes. Your best bet would be to find a nearby NKB dealer and take the bar in and lay it out and figure it out with them. If you don't have a nearby dealer feel free to PM me and I'll see if I can lay out a bar here and see if we can sort through it remotely.

-Dan


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 Post subject: Re: North 4-line bar safety diagram?
PostPosted: Wed Jul 02, 2014 2:12 pm 
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Dan-at-North wrote:
Our 2011 quad bar safety drops to a single red line that travels up about 5m to the "Y" where it flags the kite onto both front lines. All of our 4-line kites are designed in such a way that when you release to both front lines, the front connection points slide towards each other in the middle and the kite will drop onto its nose, similar to a 5-line safety.

Years ago we tested a safety that dropped to a single front line, but we found that some kites would go into a 'death spiral' when released onto a single front line. I am aware that many other brands now use the single-front-line system without a hitch, so my guess is that there's been some sort of general progression in kite design so that modern kites don't have this issue. Please don't respond to this thread with 'my brand x kites release perfectly on single front line stop bashing single front line'. I understand that there are advantages to a single front line release and I know that it works with many other brands' kites perfectly well. We have simply designed our kites around a dual-front-line release, and it works just as well for our kites as the single front-line system does with other brands' kites.

I don't have official specs for line lengths, as it can be very complicated considering that when you account for knots and stretching (we cut our lines under load) the lengths of each individual line are very odd sizes. Your best bet would be to find a nearby NKB dealer and take the bar in and lay it out and figure it out with them. If you don't have a nearby dealer feel free to PM me and I'll see if I can lay out a bar here and see if we can sort through it remotely.

-Dan
Excellent, thanks for the clarification. If the dual-line system is right then I think the bar IS setup right after all. I never heard of that setup, and it isn't mentioned (or clearly diagrammed) in any of the North documentation, so I just assumed it was wrong. Never assume..... :oops:


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 Post subject: Re: North 4-line bar safety diagram?
PostPosted: Thu Jul 03, 2014 12:31 am 
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Dan-at-North wrote:
Our 2011 quad bar safety drops to a single red line that travels up about 5m to the "Y" where it flags the kite onto both front lines. All of our 4-line kites are designed in such a way that when you release to both front lines, the front connection points slide towards each other in the middle and the kite will drop onto its nose, similar to a 5-line safety.-Dan
Dan, my setup would allow the bar to slide above the connection point - no ball, no ring, just grey and red middle lines connected to the 2 front lines. If I understand you right, after release the bar would slide past the Y connection point, effectively increasing the length of the Y leg. So, from the sound of it, my bar is set up right? That would be good news! :thumb:


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 Post subject: Re: North 4-line bar safety diagram?
PostPosted: Thu Jul 03, 2014 1:30 am 
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Location: Hood River
No. I don't have a bar convenient right now and I'm out of the office for a few days but I'm pretty sure there is a ring and/or a ball stopping the bar from sliding past that "Y" I will try to get more details when I can but if anyone else here has the bar convenient feel free to chime in.
-Dan


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