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docgr
5th November 2009, 09:03 PM
Hi,

Isonic 86 2009
I'm 178 cm and 70 kg.
I'm using a NP RS slalom 6.2

Rear streps in the middle outboard
Front streps all back inboard.

Garda Lake ... 30 to 60 cm chop.

I don't feel confident at all with my front foot, even going downwind. The weight is mostly on my back leg and sometimes the foot goes out of the strap ... over 30 knots it could be dangerous.

No problem at all with my isonic 111 2009 (that i'm using with different and bigger sails)

I've read lot of posts ... the boom, the mast track position ... the straps ..tried all ... with little results.

Could be the sail?

HELP!

:-)

Giorgio

Ola_H
5th November 2009, 10:00 PM
I'm not a slalom sailor and I have little experience with this, but my guess is that the most effective way to trim away that excessive back foot feel that make the front foot "loose" in the strap might be by some sail tuning, most likely more downhaul. That will open up the head more and push sail power lower down in the sail. And since you are sailing the sail raked back, the effect will be that the power moves a bit forward. This might give you a more balanced stance.

Boom and mast track can change your stance too, but since you tried that, the downhaul trick might be worth a try.

docgr
5th November 2009, 11:15 PM
Thanks for the advice.

Downhul ... 'i've tried ... now i'm 2 cm over the reccomended setting and the head of the sail is really opened ....

It is frustrating ... :-( .. but thanks! :-)

nonopr
6th November 2009, 01:38 AM
too small of a fin. Too much pressure on the back foot.

mark h
6th November 2009, 04:35 AM
I used to get this with my front slipping out, but only up-wind. The cure was two things.

First was like Ola says, as I was slightly under down hauling my sails. Now I always down to max. But you do this already, so no action needed there.

Second was to tighten the front foot strap so my foot felt locked to the board. Only down side is jibing, now I need to slip my foot slightly out of the strap just before jibing, over wise it used to get stuck (made me look silly):)

Also, I know you say that you have tried different foot strap positions, but, front strap at the back & inboard wont work with back strap middle and out board. First it will make down wind stance feel weird, second it will make upwind hard as you cant get out board as much. Also, at 178cm, it sounds like you've got a very wide leg stance, this will make you put your power through the back leg, leave the front kinda floating!!

Try Front strap outboard/back and rear strap outboard/forward (or front strap inboard/back and rear strap inboard/forward). This will close your legs and make it easier to distribute your weight through both your legs.

Just my 2 cents worth, and hope you figure it out.

Chris Pressler
6th November 2009, 06:12 AM
Ciao Giorgio,
sound like your trimm is not perfect. Get a bigger fin, like nonopr mentioned. A 34 will fit great. Play with your harnesslines position, perhaps a bit back, boom down. 6,2 should fit perfect on this board. Get your front straps in the middleoutside position, back straps back. Mastfoot forward out of the sweetspot.

Chris

docgr
6th November 2009, 01:29 PM
Thank you all,

i'm using a 33 cm (select) ... tried with a 35 (for a 6.7 sail) .. not much difference for the front foot, but maybe too big for the board (31.5 knots maximum speed ... with the 33 I did 33.7) ....

It has to be something connected to the trim, i know ... in some way it seems a problem with the balance of my weight, maybe with this harness position i should advance rear strep forward even more ... but it seems that nobody uses front holes for the back straps ...

I'll try ....

Marko
6th November 2009, 02:10 PM
I do not know if this helps at all but I hear about this problem often, and it is always connected to NP racing sails.

I had this problem several years ago while using RS4 7,2 but the problem disappeared after switching to another sail brand.

Cheers

docgr
7th November 2009, 04:21 AM
... maybe ... but I used the same sail with a JP super x, without any problem.

ok, isonic is a different gear ... so different??

docgr
7th November 2009, 04:31 AM
... interesting .. i've found this

http://rsracing.neilpryde.com/download/pdf/test_result_surf_0903.pdf

... it seems actually related to the sail ...

RadiantX
12th August 2010, 11:37 AM
Hi docgr. I'm not sure this will be of any help, actually I am sure it wont but I would like to say I am experiencing the same problems as you. I'm 185cm and 80kg. My front foot constantly wants to creep back and at times in rough water, out of the strap. I am however on a 09 Futura93. My front straps are set back and inboard and rear straps forward and inboard as I'm constantly sailing in rougher water rather than flat on this board. I have also tried all mentioned here to fix the problem but so far have not been able to sail this board at it's full potential due to my concern the front foot will "pop" out when travelling at speed.

I hope your sort out your gear soon docgr. Please post if you find a solution!

John1
12th August 2010, 05:54 PM
Hi.
I have a lot of experince with that as an previous owner of SB HS.

-Lower the boom
-More Downhaul
-more Outhaul
-Masttrack a bit forward
-Move the front footstrap a bit backwards, more power on the frontfoot

And the most important parameter:
-A sail with stable deep forward, draft profile

With regards,
John J

Erik Loots
12th August 2010, 06:04 PM
Pulling more downhaul does moves the sail center of effort more backwards, this means more front foot problems UNLESS the sail is more stable and you move the harnasslines also backwards.

Most sails do get more stable with more downhaul.

Hope this helps

davide
14th August 2010, 12:37 AM
Hi.
I have a lot of experince with that as an previous owner of SB HS.

-Lower the boom
-More Downhaul
-more Outhaul
-Masttrack a bit forward
-Move the front footstrap a bit backwards, more power on the frontfoot

And the most important parameter:
-A sail with stable deep forward, draft profile

All of the above but maybe check your body asset? If you adopt the classic 7 position (body and legs straight, with arms straight at about 60 degrees) you often end up putting a lot of pressure on the fin; or you might have got in the habit of moving your body and weight toward the back. Bend your knees instead (as if you were seating down): this will put the body more toward the center, sort of parallel to the side of the board, in line with the harness.

A photo might help: look how people are sailing is a "squat" position with the body weight forward. You can see it clearly with FRA809/TUR33

docgr
15th August 2010, 03:27 AM
For Radiant X: ... wich sail are you using?

For me: on the same board (the IS 86) i've tested the new Rs-slalom MkIII ltd ... both the 6.2 and the 7.0

.... and ..? no problem at all with the 7.0, quite the same thing for the front foot with the 6.2. (my post was referred to the older 2007 model) .... lowering the boom helps a little, also the mastrack a little forward (but the board seems a little slower) ...

not much help ... I understand ... :-)

Giorgio

RadiantX
19th August 2010, 05:44 AM
Thanks docgr. I'm using Ezzy Infinity & Freeride sails (2008-2010). I also have a Starboard Kode86. I know, very different board but I don't have this problem when riding that.

Thanks for your suggestions. I hope we both find a solution soon!

vikingsail
19th August 2010, 08:13 AM
I agree with Mark H. Move the front straps outboard.
take a look at Jem Hall's website, he has some good comments on footstrap widths for wave riding that have helped my slalom sailing on my Madd 135.

ThierryP
24th August 2010, 08:04 AM
Hi docgr,

I often hear these complaints from guys using NP race sails. If all of the advice you have received does not work, then, by increasing order of € amount:
1) change your front footstraps. The Drake super lights (black ones) should help
2) have additional front inserts plugged into your board, in a position that suits you better
3) change to a 6.2 from another brand.