Go Back   Starboard Forums > Free Forum

Reply
 
Thread Tools Display Modes
Old 8th February 2010, 01:06 PM   #1
agrelon
Member
 
Join Date: Apr 2009
Posts: 421
Default Footstrap Position and Speed

Hi all,

I've just bought a 2006 JP Super X 106l and was blown away on my first outing by it's speed and acceleration.

I had the foot-straps in the outboard setting but only on the 3rd (out of 4) most back setting, and can therefore still move both straps about 2cm further back.

Does moving the straps further back generally increase maximum speed?

I would have imagined so as there would be more lift on the front of the board and less wetted surface area....

Any comments?
__________________
JP Super-X 106l, North F8 Ram: 5.8m,
175cm, 54kg
agrelon is offline   Reply With Quote
Old 8th February 2010, 11:43 PM   #2
mac33
Member
 
Join Date: Sep 2009
Location: perth west australia sail swan river 3km wide
Posts: 42
Default

at your weight 54kg, moving straps to very back position would produce too much board lift, especially in stronger wind. i am another 12kg heavier, i have my backstraps as far forward as possible.

this helps to stop the board from taking off in gusts.

ask different sailors and some will say moving straps back is faster, a few will say moving straps forward is faster.

at my 66kg i try to reduce the lift of board as much as possible.

straps forward,weight in harness forward to nose, smaller fin,lower boom and high hook height all help.

a 5.8m at 54kg is quite large. a 4m + 5m will be faster for you if the wind is decent.
mac33 is offline   Reply With Quote
Old 9th February 2010, 10:36 AM   #3
agrelon
Member
 
Join Date: Apr 2009
Posts: 421
Default

Thanks for your advice. I think the same sort of thinking applies for mast track position... further back = more speed but less control due to more lift.

I had a 5.3m until 3 days ago when it got stolen from the place I stored it on the beach... So I'm with a one board and one sail for the moment. I do have a smaller fin though, which I can stick on my board if the wind really picks up to help me gain as much control as possible.
__________________
JP Super-X 106l, North F8 Ram: 5.8m,
175cm, 54kg
agrelon is offline   Reply With Quote
Old 9th February 2010, 05:28 PM   #4
Farlo
Member
 
Join Date: Aug 2006
Posts: 527
Default

JP SX106 has not much power in tail, and is not the most stable in its category. IMHO you will gain very little speed (if any) by moving the straps back. Some shapes work better globally with backward settings because you fly higher over chops. This one has a tendency to take-off already. A smaller fin will have a lot more influence on control and speed.
Farlo is offline   Reply With Quote
Old 10th February 2010, 09:53 AM   #5
agrelon
Member
 
Join Date: Apr 2009
Posts: 421
Default

Quote:
Originally Posted by Farlo View Post
JP SX106 has not much power in tail, and is not the most stable in its category. IMHO you will gain very little speed (if any) by moving the straps back. Some shapes work better globally with backward settings because you fly higher over chops. This one has a tendency to take-off already. A smaller fin will have a lot more influence on control and speed.
Next time I sail I'll try using my smaller fin (~30cm), footstraps completely back and out and mast track slightly back. I think with the smaller fin I should still be able to control the increased lift and might see some gains in top end speed.

Cheers.
__________________
JP Super-X 106l, North F8 Ram: 5.8m,
175cm, 54kg
agrelon is offline   Reply With Quote
Old 26th February 2010, 04:52 PM   #6
iago
New Member
 
Join Date: Nov 2008
Posts: 14
Default

perchè parlate di tavole Jp sul sito starboard??


why talk of JP boards on the site starboard?
iago is offline   Reply With Quote
Old 26th February 2010, 05:16 PM   #7
Unregistered
Guest
 
Posts: n/a
Default

iago - my thoughts exactly

what about Futura or iSonic ??
  Reply With Quote
Old 26th February 2010, 06:17 PM   #8
agrelon
Member
 
Join Date: Apr 2009
Posts: 421
Default

Quote:
Originally Posted by Unregistered View Post
iago - my thoughts exactly

what about Futura or iSonic ??
Because unfortunately I only have the money to buy second hand equipment and that a JP board was the best thing on offer. Trust me, if I could've gotten a Futura or even an S-type I would have.

As for posting on this forum, it's the best one on the internet for windsurfing info.
__________________
JP Super-X 106l, North F8 Ram: 5.8m,
175cm, 54kg
agrelon is offline   Reply With Quote
Old 7th March 2010, 04:32 AM   #9
Jean-Marc
TEAM
 
Join Date: Aug 2006
Posts: 1,289
Default

Agrelon,

I find that for your XS weight, a 36 cm fin is way too large with a 5.8 sail.

Never run that JP but I did use a Starboard Carve 111 with her stock 32 cm fin and a 5.4 m2 sail but the stock fin was way too large. A 26 cm slalom fin was a perfect setup up to 25 knots for my 65 kg, so I surmise the same should be fine with your 54 kg as well. A 36 cm fin was recommended for a 7.4 m2 sail on the Carve 111 BTW, so I'm pretty sure there is something wrong with your fin sizing setup.

Cheers!

JM
Jean-Marc is offline   Reply With Quote
Old 7th March 2010, 08:39 AM   #10
agrelon
Member
 
Join Date: Apr 2009
Posts: 421
Default

Quote:
Originally Posted by Jean-Marc View Post
Agrelon,

I find that for your XS weight, a 36 cm fin is way too large with a 5.8 sail.

Never run that JP but I did use a Starboard Carve 111 with her stock 32 cm fin and a 5.4 m2 sail but the stock fin was way too large. A 26 cm slalom fin was a perfect setup up to 25 knots for my 65 kg, so I surmise the same should be fine with your 54 kg as well. A 36 cm fin was recommended for a 7.4 m2 sail on the Carve 111 BTW, so I'm pretty sure there is something wrong with your fin sizing setup.

Cheers!

JM
High JM, yeah I think so too. Even with the straps completely outboard I had to dig my heels in to keep the board flat. Also, I couldn't initiate carve jibes which was really strange.. but according to the Select-Hydrofoil website that is one symptom of having a too large fin.

I'm trying a 32cm today, I think it should be much better.Just put side by side, my 36cm and the 32cm seem to have an even bigger difference in size than 4cm, and the 32cm is much lighter. I'll post back on how this setup works.

Cheers.
__________________
JP Super-X 106l, North F8 Ram: 5.8m,
175cm, 54kg
agrelon is offline   Reply With Quote
Reply

Bookmarks

Tags
None

Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
HWR Footstrap position?Remi? nonopr Ask Our Team 6 17th December 2010 05:45 AM
Footstrap Position and Spinout agrelon Free Forum 0 31st January 2010 07:27 PM
question about footstrap position Unregistered Free Forum 1 29th December 2008 09:29 PM
Footstrap position for Isonic 101 superidis Kevin`s Corner 3 27th April 2008 12:54 PM
Footstrap position for is76 Tjabo Ask Our Team 1 7th March 2008 02:31 AM


All times are GMT +7. The time now is 10:46 AM.