Quick rigging question

> 10 years ago
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sailingkid
sailingkid
VIC
60 posts
VIC, 60 posts
10 Feb 2012 7:37pm
Hi everyone, I recently bought a 6.2m 2008ish neil pryde sabre to replace my nearly stuffed 6m 1996 V6. The V6 was obviously a pretty grunty sail compared to the no cam saber, however every sail I would forget to put on that little strap on the Saber that goes around the mast at the bottom of the sail. However today I actually remembered to put it on, and as a kinda apprentice sailmaker at a boat building place I wondered what the point of this strap was. Upon pulling it on I discovered it adds depth to the bottom of the sail, kinda like letting the outhaul off, but in reverse. So I was wondering what's the normal range people use on this strap, because today it was pretty light when I went out so I had it cranked and the sail was pulling like a train down low, compared to the normal light, gutless feeling it had before, and my arms were getting fairly sore, even fully committed to the harness and straps (don't normally get sore). I'm pretty sure the harness lines are right too because I can sail around 1 handed for ages. So did I just overdo it (there were crinkles in the 1 foot surrounding the strap on the sail, but the overall shape was nice), or I just need to toughen up? And do you guys and girls adjust it like you do the downhaul for each day, or kinda just set it once and forget?

Thanks, Sailingkid
decrepit
decrepit
WA
12885 posts
WA, 12885 posts
10 Feb 2012 7:17pm
Heavy sail feeling is often caused by not enough downhaul. The leading edge of the sail should be about the same angle to the wind along it's length. This means that the flatter top section needs to twist. If the bottom id bagged out, the top flat, and the leach tight, there will be drag caused by either the bottom presenting too blunt an entry or the top too fine an entry.
This results in that "heavy" feeling.
Gestalt
Gestalt
QLD
14968 posts
QLD, 14968 posts
10 Feb 2012 9:48pm
the way a sail works it's not only the leach that twists but also the foot of the sail.

putting the tack strap around the bottom of the extension and tensioning will tighten up the foot of the sail mainly and tighten up the leach to a smaller degree also. this is not the case on all sails.

so in light winds. crank it on hard.
in heavy winds crank it on not so hard.

then set you sails downhaul to suit the wind.
paddymac
paddymac
WA
943 posts
WA, 943 posts
10 Feb 2012 8:48pm
Have a look at www.severneracing.com/rigging_video.php

According to Ben, due to the position of the block the foot tension sits slightly higher than the foot. Tension is brought down lower by the tack strap.

edit - wrong vid
Gestalt
Gestalt
QLD
14968 posts
QLD, 14968 posts
10 Feb 2012 11:02pm
i must have missed something paddymac. i watched that wentire video and no where did ben s actually state what the tack strap is for.
paddymac
paddymac
WA
943 posts
WA, 943 posts
10 Feb 2012 9:41pm
Gestalt said...

i must have missed something paddymac. i watched that wentire video and no where did ben s actually state what the tack strap is for.


bugger, you're right. I started to check that I had the right vid but it was taking sooo long to load I gave up. My bad. I'll try and find the right one.
Gestalt
Gestalt
QLD
14968 posts
QLD, 14968 posts
11 Feb 2012 12:00am
^ nice, severne seem to have some good infomovies.
lungs
lungs
QLD
492 posts
QLD, 492 posts
11 Feb 2012 7:56am
paddymac said...

Gestalt said...

i must have missed something paddymac. i watched that wentire video and no where did ben s actually state what the tack strap is for.


bugger, you're right. I started to check that I had the right vid but it was taking sooo long to load I gave up. My bad. I'll try and find the right one.


Is this the one your looking for at 7:15, Mr Ezzy talks about it briefly

www.windsurfing-legends.com/windsurfing-sails.html

paddymac
paddymac
WA
943 posts
WA, 943 posts
11 Feb 2012 8:22am
Thanks lungs, that's the one. Ben and Dave look sooo similar you can easily see how I got confused 7:15

Waiting4wind
Waiting4wind
NSW
1871 posts
NSW, 1871 posts
11 Feb 2012 1:31pm
I have a couple of Saber sails and they are my favourite no cam sail.

I set the DH to max recommended and use a tight tack strap.

Then use the outhaul to regulate power / back hand pressure. I generaly sail neutral OH but the sail has plenty of power and twists of nicely. When thwe wind comes up just crank on some OH.

The Saber is quite a locked in and relatrively light sail to use.
bobjc
bobjc
14 posts
14 posts
13 Feb 2012 8:05pm
nice information Thanks For Sharing
Mark _australia
Mark _australia
WA
23685 posts
WA, 23685 posts
13 Feb 2012 8:52pm
paddymac said...

Thanks lungs, that's the one. Ben and Dave look sooo similar you can easily see how I got confused 7:15




Gawwd don't post a video titled "what makes Ezzy sails different", Barn will be all over it
sboardcrazy
sboardcrazy
NSW
8349 posts
NSW, 8349 posts
15 Feb 2012 9:05am
Bit off topic but the last sail I had with my KA 6.6m Koncept I really downhauled it.Much more than usual so the top 3 panels were flapping and making a crinkle sound.Usually I have them loose but not that much. I also put a little out haul on but not as much as usual. I like to go upwind a lot and I wasn't sure how it would go with less outhaul.
Usually I find that sail hard to pull on once the wind gets up to 15kts odd.
Wow what a difference! 1st time I've ever felt totally comfortable and blitzing upwind.What a difference downhaul makes!Best sail I've had for ages.The wind was ideal 15-17kts.
Last few downwind runs were scary with wind at 20kts and choppy with the big board & sail.I weigh 61kgs & had the 6.6m up and others at 75kgs were overpowered with a 6.3m so I was glad to get in in one piece!
evlPanda
evlPanda
NSW
9207 posts
NSW, 9207 posts
15 Feb 2012 12:19pm
^ Less downhaul, more outhaul for upwind. Overall flatter sail.

This is because the apparent wind at top of sail will now be at a very similar angle to the apparent wind at the bottom of the sails.

Opposite for downwind.

(basically flat for upwind, shape for downwind)

bobjc
bobjc
14 posts
14 posts
18 Feb 2012 8:41pm
Its Awesome! Thanks For Sharing Related/Good Information!
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