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Old 23rd August 2008, 05:19 PM   #1
Huub
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Default iSonic 2009 scope & rockerline measurements?

Hello,

I have noticed the past few years that hardly anything is mentioned about the underwater ship in any detail.

For example:
• How much V is there & how does the V progress in degrees related to the width & length of the board?
• What is the rocker in mm?
• Where does the scope start -> at 90cm or a 100com?
• At what rate does the scope in mm increase related to the length?
• Etc…

This is very useful information which can give an initial indication of the characteristics of how the board will sail in different conditions.

I am sure you have these kinds of measurements written down.

Could you please tell us:
• What has changed compared to the 2007 iSonic?
• Could you provide us with some measurements? For example of the iSonic 101
• Will it be possible to post this kind of information on the website? Are there any plans to do this?

Regards,
Huub from Holland
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Old 23rd August 2008, 06:44 PM   #2
Ian Fox
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Hello Huub,

If you want to use the iSonic 101 2007 vs 2009 as your example ;

Both boards are fundamentally flat V under water shape. The 2009 has slightly more V (7mm vs 5mm) in the entry section, slightly more in the mid section (5.5mm vs 4mm) but 2009 is flatter under the rear foot ( 5mm over a wider tail width vs 8mm on 2007). Tail rocker (kick) on 2009 is basically flat, vs 1.0mm from 20cm on 2007. Nose rocker (scoop) on 2009 is 183mm vs 174mm on 2007. Start of scoop on both boards is around70cm (not 90 or 100) and the rate of scoop rises very marginally faster on 2009 vs 2007.

No, there are no plans to post full 3D dimensions / specifications on the website.
But thanks for asking.

Cheers ~ Ian
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Old 23rd August 2008, 07:38 PM   #3
nonopr
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Looks like a shaper wants some inside information to built some boards.....
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Old 25th August 2008, 10:40 AM   #4
Steve711
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Quote:
Originally Posted by Ian Fox View Post
Hello Huub,

If you want to use the iSonic 101 2007 vs 2009 as your example ;

Both boards are fundamentally flat V under water shape. The 2009 has slightly more V (7mm vs 5mm) in the entry section, slightly more in the mid section (5.5mm vs 4mm) but 2009 is flatter under the rear foot ( 5mm over a wider tail width vs 8mm on 2007). Tail rocker (kick) on 2009 is basically flat, vs 1.0mm from 20cm on 2007. Nose rocker (scoop) on 2009 is 183mm vs 174mm on 2007. Start of scoop on both boards is around70cm (not 90 or 100) and the rate of scoop rises very marginally faster on 2009 vs 2007.

No, there are no plans to post full 3D dimensions / specifications on the website.
But thanks for asking.

Cheers ~ Ian
Hi Ian, Could you also give a general comparison or changes on the bottom shape of the 2008 vs 2009 Isonic 111? I love my 111 a lot and wonder if it is justifiable to change over for the 2009. Thanks.

PS. I'm not a shaper but do know how slight changes to the bottom of the board can affect the ride.
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Old 25th August 2008, 01:35 PM   #5
Ian Fox
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Hi Steve,

Looking at 2009 iS111 and 2008 iS111;

Both boards are fundamentally similar flat V under water shape. The 2009 has slightly more V in the nose but both boards have similar V (~2.5mm) in the entry section, 2009 slightly more in the mid section (4mm vs 3mm) but 2009 measures only marginally flatter under foot ( 3.5mm over a wider tail width vs 4mm on 2008). Tail rocker (kick) on both 2009 and 2008 is basically flat. Nose rocker (scoop) on 2009 is 169mm vs 165mm on 2008. Longer planing flat on 2009 until start of scoopr around 70cm (vs 60cm on 2008) and the rate of scoop rises very marginally faster thru the entry section on 2009 vs 2008.

More significant differences on the 2009 iS111 are are the further concentration of planing area between the feet (use of flyers ahead of rear strap effectively adds +2cm width in this area) ; the slightly thicker, more domed standing area tapering forward of front foot to a noticeably thinner nose profile, and a deeper recessed mast track - all adding further top end control.

Cheers ~ Ian
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Old 26th August 2008, 03:24 AM   #6
Huub
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Hi Ian,

Thanks for sharing this information with us. That brings me to my next question which is related to the assumption that the changes that have been made are to make the iSonic even easier to control than it already was.

Have you considered putting in a mono or double concave in the front part of the underwater shape?

If not, why not? If you did consider it -> what where the reasons for not putting in a mono or double concave in the front part?

Thanks again,
Huub
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Old 14th September 2008, 01:52 PM   #7
G
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hallo Ian,
I'm still a (proud) owner of a Isonic 111 2007.After having found the right fins and understood the way it sails I'm one of the most fast in crew I sail with (very competitive).At my 80 kg I use it with 7,8 and 6,7 with a fin range from 38 to 42.Own also a bigger slalom for the 9,0.
I'd like to upgrade my 111 but I'm so happy with it that I'm very scared that the new board will lack something of it.Lot of doubts and questions.Would you help me please?
I often sail the 111 very powered up in "active" (never give up!) mode.Push like crazy in every condition and my average speed is fantastic.Gybe is unbelievable!
There's also a lighter guy (75 kg) who use a 101 2008 with a 6,8 . He's pretty fast when the wind is steady and constant but looses or gains if it gusty.I guess that the 101 should be used overfinned like every isonic as well as overpowered and that's why he gives up against me.Plus I think the 101 should be a little more comfortable in rough water even if it has basycally the same range of 111.Do you agree?I see 2009 has improved the tail width and you've thinned the nose.According with my bad experience of it with my 162 do I have expect the same feeling with new isonic or it's different?It's true that the nose of 162 never catch the waves but the amount of width and volume in the tail suit better the heavy weight and tall guys.WOuld you help to understand that point?
Now,do you think I should go for new 101 or new 111 ?
Note that I currently own a Manta 79 as biggest slalom which is great in pure slalom condition but suffers a bit if wind is very close to the low limit.For that reason I' considering also the new 133.Would yuo like give me some feedback of it?
I see that the new 111 and 122 have volumes really close (110-113 l.). What's the reason for that?WHat's their sailor/condition target?
Please consider I don't care anything but competition.

Thank you

Last edited by G; 14th September 2008 at 02:05 PM.
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