Is that ALL !?! Ahh just leave it then
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<br>US I-20 will have an small advantage over iF20 in light airs
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<br>US I-20 will have a small disadvantage over iF20 in heavy airs
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<br>just make sure that the ratio between light and heavy air is equal and you'll cancel out any differences over a season.
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<br>This minor difference should not be significant. only 5 % on the mainsail in rated sailarea (carl !) when sailing with 3 sails up this is decreased to something of 2,5 % and when the square root is taken (power to speed conversion) you are left with 1,5 % speed advantage. Or about 1 minute in one hourin I-20 favouring conditions. I say ACCEPTABLE as a grandfather margin. Any speed margin around 1 % are to be expected between the different designs and I expect the P19 and H20 to have the same margin on their side in heavy air.
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<br>Just dispensate all I-20 's before 1 januari 2002 and require all new I-20's to be of iF20 compliance and you're set. Problem solved. Those sails will eventually blow out and everybody will be full compliant then.
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<br>Wouter<br><br>