Contact   Imprint   Advertising   Guidelines

Sliding spreader bar dimensions

A forum dedicated to Hydrofoil riders
User avatar
cglazier
Very Frequent Poster
Posts: 2400
Joined: Sat Apr 13, 2002 1:00 am
Kiting since: 1999
Gear: Naish, Duotone, Flysurfer, Alpine
Brand Affiliation: None
Location: Vancouver, Canada
Has thanked: 22 times
Been thanked: 18 times

Re: Sliding spreader bar dimensions

Postby cglazier » Mon May 13, 2019 3:28 am

Peter_Frank wrote:
Sat May 11, 2019 11:31 am
A is close to zero on mine :D
So the bar can come as close to you as possible, and it slides well. 8) PF
Interesting Peter... I guess you like it to slide a lot.

I prefer a more limited movement. My Ion bar has B=15cm and I have set A=3cm. Obviously mine only slides a few cm in each direction which is just fine for me.
It is personal preference.

:wink: CG

kitexpert
Very Frequent Poster
Posts: 747
Joined: Sun Aug 09, 2015 11:20 pm
Kiting since: 2003
Gear: many kites, also diy
Brand Affiliation: None
Has thanked: 1 time
Been thanked: 7 times

Re: Sliding spreader bar dimensions

Postby kitexpert » Mon May 13, 2019 10:30 am

Peter_Frank wrote:


No, just a regular carbon plate/rope spreader bar, B is 20 cm / 8 inch on mine.

See my harness, A is only about 1 inch even under load it hardly gets much more than that which is pretty close to your body, right?

Of course not "zero", but zero would be the goal :D
SlidingBar.jpg

8) PF
Ok, it is possible to go shorter and also harness becomes a bit cleaner looking when rope isn't hanging out. I'm not saying usual way to attach rope isn't working, it is.

If rope would really keep A at 1in under loading (body weight 80kg) and having B (rope length) 8in, it would mean enormous tension to the rope: quickly calculated over 9 tons. This same method can been used to pull a car from the ditch (if strong rope can be tightened somewhere appropriately).

Physically pulling straight rope from the middle is very bad situation if that rope is meant to be as straight as possible.

AndersP
Medium Poster
Posts: 56
Joined: Mon Jul 03, 2017 9:23 pm
Kiting since: 2015
Gear: Shinn Bronq
Gong allvator regular + surfwing
Gong kites
Brand Affiliation: None
Location: Goteborg
Has thanked: 7 times
Been thanked: 2 times

Re: Sliding spreader bar dimensions

Postby AndersP » Mon May 13, 2019 11:24 am

The bar is usually bent so it will not get so high forces.
If you have a tight rope, the connection will not be as stable in the middle of the rope. If you have a bit of slack it moves in opinion more controlled from side to side and is also stable in the middle.

kitexpert
Very Frequent Poster
Posts: 747
Joined: Sun Aug 09, 2015 11:20 pm
Kiting since: 2003
Gear: many kites, also diy
Brand Affiliation: None
Has thanked: 1 time
Been thanked: 7 times

Re: Sliding spreader bar dimensions

Postby kitexpert » Mon May 13, 2019 3:33 pm

AndersP wrote:
Mon May 13, 2019 11:24 am
The bar is usually bent so it will not get so high forces.
If you have a tight rope, the connection will not be as stable in the middle of the rope. If you have a bit of slack it moves in opinion more controlled from side to side and is also stable in the middle.
Yes, that is true. But in practice you can try to get it as tight as possible, because it anyway will not stay tight. My method to do it makes A perhaps inch shorter, mainly it just looks better.

Oldman
Rare Poster
Posts: 18
Joined: Mon Jun 02, 2014 4:35 pm
Kiting since: 2009
Gear: Firewire north moses rideengine. Foil, surfboard
Brand Affiliation: None
Has thanked: 9 times
Been thanked: 0

Re: Sliding spreader bar dimensions

Postby Oldman » Mon May 13, 2019 5:24 pm

kitexpert wrote:
Sat May 11, 2019 10:55 pm
Peter_Frank wrote:
Sat May 11, 2019 11:31 am
A is close to zero on mine :D

So the bar can come as close to you as possible, and it slides well.

8) PF
Interesting. I know only one method how this distance can be shortened from the usual and I've invented it. If rope is attached like it is drawn in the OP's picture it can never be as close to body as it is possible. Do you use some different way to do it?

For B I have about 10in. There wasn't room for more than that but I think it is enough.
So how do you get the lines (A) as short as possible?
thanks

AndersP
Medium Poster
Posts: 56
Joined: Mon Jul 03, 2017 9:23 pm
Kiting since: 2015
Gear: Shinn Bronq
Gong allvator regular + surfwing
Gong kites
Brand Affiliation: None
Location: Goteborg
Has thanked: 7 times
Been thanked: 2 times

Re: Sliding spreader bar dimensions

Postby AndersP » Mon May 13, 2019 7:59 pm

A is 6 cm, B is 18.5 cm on my ion composite slider bar.
Total travel sideways is 22cm. Bit of slack in the line gives longer travel. Nice and smoth transitions. Tried shorter A but experienced twitchier transitions and not as stable in the middle. Depower throw is more than enough.

borist
Very Frequent Poster
Posts: 542
Joined: Tue Apr 20, 2010 12:30 am
Kiting since: 0
Brand Affiliation: None
Location: San Diego, CA
Has thanked: 0
Been thanked: 4 times

Re: Sliding spreader bar dimensions

Postby borist » Tue May 14, 2019 12:50 am

I got sloppy when replacing the rope. now it is a bit slack (longer "A" dimension) could be as much as 5-6 inches. Still works fine, enough reach for me. I found that having quick release too close to the spreader on my Vega sit harness (using Slingshot Talon metal loop) was detrimental to the comfort. now i use standard plastic loop over the rope with slack rope. this keeps the bar at comfy position foiling both heel and toe side. very personal, me thinks

zerogee_ca
Very Frequent Poster
Posts: 501
Joined: Sat Mar 13, 2004 6:18 am
Kiting since: 0
Brand Affiliation: None
Location: Winnipeg, Canada
Has thanked: 2 times
Been thanked: 2 times

Re: Sliding spreader bar dimensions

Postby zerogee_ca » Tue May 14, 2019 2:20 am

kitexpert wrote:
Mon May 13, 2019 3:33 pm
AndersP wrote:
Mon May 13, 2019 11:24 am
The bar is usually bent so it will not get so high forces.
If you have a tight rope, the connection will not be as stable in the middle of the rope. If you have a bit of slack it moves in opinion more controlled from side to side and is also stable in the middle.
Yes, that is true. But in practice you can try to get it as tight as possible, because it anyway will not stay tight. My method to do it makes A perhaps inch shorter, mainly it just looks better.
Yes. The knots will slip and tighten so I also tie as short as possible. Once under load it works out to about the right length for me.

User avatar
cglazier
Very Frequent Poster
Posts: 2400
Joined: Sat Apr 13, 2002 1:00 am
Kiting since: 1999
Gear: Naish, Duotone, Flysurfer, Alpine
Brand Affiliation: None
Location: Vancouver, Canada
Has thanked: 22 times
Been thanked: 18 times

Re: Sliding spreader bar dimensions

Postby cglazier » Wed May 15, 2019 5:13 am

Here is the new 2019 ION spreader bar. It has a plastic body with thick foam pad. The rope is adjustable. It appears compatible with Dakine harnesses.
BAFF0E34-236C-4C48-8972-613980127E34.jpeg
These users thanked the author cglazier for the post:
Flyfish (Wed May 15, 2019 2:27 pm)
Rating: 10%


Return to “Hydrofoil”

Who is online

Users browsing this forum: drsurf, juandesooka and 5 guests

cron