Hi John,
<br>I guess I wasn't clear.
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<br>The 30 pound increment was meant for a crew + boat weight.
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<br>Although building for 320 pounds all up is very possible, it is not what I had in mind.
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<br>My minimum weight suggestions where 375 for the boat and 300 for crew for a total of 675 pounds. From there we can set a different sailarea for each additionnal 30 pounds.
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<br>group 1 - 675 pounds SA 240 (this would be similar to the old Tornado)
<br>group 2 - 705 pounds SA ???
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<br>group 3 - 735 pounds SA ???
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<br>group 4 - 765 pounds and over SA ???
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<br>Notice groupe 3 is pretty well what Steve is suggesting as his min weight suggestion (boat 390 + crew 350 = 740 ).
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<br>example: class 3 could define a 440 pound boat with a 310 pound crew(+/-15#) just as it would define a 400 pound boat with a 350 pound crew(+/-15#).
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<br>This type of system would make it very easy to amalgamate *most* existing ~20 foot cats in NA F20.
<br>*I say most because I am not sure what to do about the wide beam boats.
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<br>John, if you have time, can you run these numbers through the ISAF spreadsheet and see what it may suggest as a sail area for each group.
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<br>As in iF20 the sailarea difference would only be added to the jib and spi. This is fairly simple.
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<br>fair play all around
<br>Marc
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