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Topic: classrules |
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tasarhans |
Posted: 01-Sep-05 12:03 |
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The ISO is one design dinghy.
But I also red somewhere about old and new style jibs.. Is there a difference and if yes... what does it mean
Are there more developments of class rules and where to find...
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paolomoncia |
Posted: 01-Sep-05 12:12 |
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For a start, look at the rules and specification page of the website
http://www.isoracing.org.uk/rules_regs/index.htm
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mmoncia |
Posted: 01-Sep-05 12:24 |
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I just joined the class and, sailing in Italy, I face similar problems you may face in Nederland not having many ISOs around....
Let me tell you that first of all ISO is a great class, al sailors are plenty of advices and if you get the chanche to join them for some event you'll see everybody giving tips and helping resolving problems you may have on the boat.
Going to your question, sails had minor changes during years (not the sail area but only minor changes in shape and depth).
here is a description of sails across years I had from Bob while I was looking for a boat:
"The old style sails are the original materials from 1993 which were used in production by Sobstad until around 2000 - I don't know exactly when they changed but it would be somewhere around that time.
The originals were a ribbed interior - just like Buzz and BOSS - that was then protected by a mylar layer on the outside. This works very well for a while but then the mylar layer starts to come off. This is more so on the jibs that the main sail.
The 2nd generation were made from Sobstad's Genesis material. Same concept on the interior ribbing but covered in something different to mylar. I don't know what is was but it gave a sort of rubber feel to the outside of the sail.
3rd generation is the new Chinese made sail from 2003
4th generation is the 2004 sails where Sobstad have added a Dacron layer and put it on the outside of alternate panels."
My personal feeling is that age/generation of sails has no dramatic impact on performance as you could expect, as always if I had to choose between two sails I'd choose the newer (seems you can point a bit more with them)...
I Hope this helps.
[Edited by mmoncia on 01-Sep-05 12:31] |
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Ian Moss |
Posted: 01-Sep-05 12:41 |
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Any Sobstad mylar sails made specifically for the ISO are class legal.
The Sobstad sails are slowly evolving due to meterials used and techniques in manufacture so there is a slight difference between different age sails although the size of the sails should not change!
The new jibs do appear to be quite different from early ones with a very obvious change in the material structure but this does not appear to affect the performance of the sail and it is arguable as to whether this means they last longer than the previous design. The class association are generally happy with the new sails being produced.
The rules are evolving to allow more choice for the owner to set up the boat how they want it. If you have any suggestions please let us know. Read the rules to see what can now be done but generally it allows more choice of ropes and blocks.
Ian Moss |
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