|11th March 2013 04:24 PM|
|19th November 2012 03:42 PM|
I agree with you Mark, for 95% of us a freerace board will be just as quick and a hell of a lot more comfortable to sail especially when using non-race sails.
So the lower threshold on a 137 is the same as my Ultrasonic, interesting.
|18th November 2012 08:02 PM|
Hi, I (98kg) sail the 137 with NP evo 9.5 / 8.6 / 7.8 in competition. Board is great with 9.5 (with 51cm or even 54 cm fin), and oke for me with 8.6. When wind is suitable for 7.8 I rather change to the 107 and 7.8.
My advice, as you already bought the 137: buy the 9.3 or better a 9.5 racesail.
|9th November 2012 09:02 PM|
I know a lot of people will disagree with me, but I wonder if you would be better looking at the Futura instead of the iSonic!!!
Yep the iSonics will work with performance freeride sails and freerace sails, and I see lots of people using these type of sails on iSonics and they are having a great time, but they are not really going faster than good freerace boards.
To be 100% truthful, iSonics are really designed to be sailed with full race sails in over-powered conditions. This something that freeride/freerace sails don't do as well as full race sails. In over powered conditions, iSonic become alive, fast and fun.
In most 6m or 7m freerider or freerace conditions it would be correct to take an 8.5/9m sail on an iSonic. Not every ones idea of fun, but thats how iSonic like it.
And I agree with Jean-Marc, a 7.2m on the iS137 is not good. 8.5m is really the smallest you should go.
Just my 2 cents worth
|9th November 2012 01:25 PM|
Agree with most comments above but I strongly doubt you will be able to plane as of 8 knots with an 8.7 sail at 73 kg. I guess the NP chart is kindda off the mark on this case because I cannot do it for sure in real life.
Please, find below what I'm using for my 183 cm/65 kg body weight on iSonic 117 wide carbon 2012 :
- Reflex II 11.0 m2 + 55/54 cm fin : planing as of 7 knots of wind
- Reflex III 8.6 m2 + 48/44 cm fin : planing as of 10 knots of wind
- Code Red 7.7 m2 + 44/40 cm fin : planing as of 11 knots of wind
- Raf Jet 6.9 m2 (no cams) + 44/40 cm fin : planing as of 12 knots of wind
- RS1 6.6 m2 + 40 cm fin : planing as of 14 knots of wind.
Do not dismiss the 3 knots difference between 7 and 10 knots of wind as not significant. On the contrary, this is a huge difference in fact. The lighter the wind, the more sail surface you'll need to start and sustain the planing with your big board. BTW, the planing difference between an 8.5 and a 9.5 sail is about 1 knot earlier. That is small in absolute term but it is plenty enough to be able to plane with a 9.5 sail whereas you will shlogg with an 8.5 sail if the wind is just too light for you.
Since the iSonic 137 is really a big board for your medium weight, I would strongly suggest you to use the H2 9.3 m2 sail (or something larger) if you really want to maximize its low range of usage. For the record, I've tried my 11 m2 sail + 55 cm fin on an iSonic 127 carbon 2011 and it was flying upwind and downwind without any problem as of 7 knots of wind.
However, the main concern that I have for you is I fear that your sail of 7.2 m2 is quite a bit too small on such a big board for your relatively light weight (iSonic 137 is mainly designed for 95+ kg rider for PWA slalom) and I doubt it will be an efficient combo when the wind is strong with some serious chop. You can try with the 7.2 sail and a small fin, but do not expect some miracle control and handling...
|9th November 2012 12:53 PM|
|mcross19||At 73Kg he is unlikey to want anything in the 10m+ sail size aslo he has said that it will be his one and only sail purchase so H2 8.7 or Severne Turbo 8.6 is perfect considering his next sail down is 7.2. 9.3 down to 7.2 is quite a big jump but is do-able.|
|9th November 2012 11:02 AM|
Agree with mcross19.
There isn't much between 8.5 and 9.5 and even less between 8.7 and 9.3.
But when it comes to planing, there is a lot of difference between 8 knots or 11 knots average, although only 3 knots.
Anyway I jump from a 8.8. straight to a 10.9 in ultra light winds. 87kg.
|9th November 2012 08:47 AM|
Neo, I haver an 8.6 Severne Turbo and can plane in 11 knots of wind with it and I weigh 85Kg. If I were thinking of going biggger than 9m I would consider a sail with 3 cams definitely.
Early planning is all about technique and if your technique is good the isn't much between a 8.5 when compared to a 9.5.
Best recommendation is take your isonic 137 along to a demo centre and borrow a few deifferent sails.
|8th November 2012 08:01 AM|
Thanks a lot for your recommendation.
My only concern about choosing the 8,7 instead of the 9,3 is that according to NeilPryde's general wind-range-chart
(the chart that shows all the sails together - not the chart on H2's page which differs a bit and I suppose needs updating)
the low-end threshold of 8,7 H2 is not much different from that of 7,2 Hellcat, only 2-3 knts of wind (8,7 H2 starts at about 8 knts, while 7,2 Hellcat starts at 10-11 knts).
If you can, please have a look at NeilPryde's chart and verify or not your initial recommendation (for the 8,7) - it would be much appreciated.
Thanks a lot anyway,
|7th November 2012 06:39 AM|
|mcross19||Sounds like the H2 8.7m will be perfect for you, try and get your hands on an X9 mast though to make the sail feel lighter.|
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