Hi Mike
<br> thanks for posting ,-this should be fun , but also a tremendous education , and alot of work -research -communication -and promotion will be needed for this to be successful ,-maybe why I,m for a more open inclusive less complex rule formation and 20 Class
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<br>-All mfg's publish boat specs. with their advertisement , I will find some basics and post them , as we get basics established we will rely on top sailors sail makers ,designers etc with experience in various boats to provide recommendations on upgrading existing catamarans to the max.rating,-or equivelent grandfathered in to existing F-20 rating ,whichever direction the group desides,--at present everything is open for discussion I presume .-There can be a seperate article written and published on each , hopefully with volunteers or a particular sailmaker with explaination and photos of various modifications to the particular cat along with spin setups ,-self tacking jib set up etc.
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<br>-Existing F-20 s presently manufactured that come to mind are the Fox -I-20 {non conforming in the U S } and new Storm -plus others -existing cats that may be modified to become compeditive are N-6-0 P-19 H-20 Mystere 20 ,-we can run through the list in the ratings columns -
<br> There are also a few lightweight existing 20s --the CFR 20 and Marstom 20 .-I,m not sure if these lighter cats would rate into the 20 ft catagory using a Design Formula approach to the class ,-it would depend entirely on what the group desides would be a max.rating allowed ,-and then what trade offs would be required as in porportional reduced sail area from existing to equal a rating number within the proposed formula .
<br> I also understand that boats will and are being built in antisipation of this class .
<br> The interesting aspect is that some boats within the rule will have an advantage in particular sets of wind and sea conditions ,just as they do now in open racing,
<br>-All the N-6/0 Sailors have been through modifications and the boat exists in 4 or 5 different configurations from it's original, sure there will be some valueable input there on boat modification.
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<br>-Believe your right ,-we should list all 20 ft cats and specs .
<br> We all need to be familiar with existing F-20 rules -
<br> and become familiar with ISAF and Texel ratings and formulas .
<br>-Hopefully many others will post and add valuable input and information ,-I did send Bill Roberts gen specs on several 20s a few months ago for a spread sheet he was working on ,-his knowledge and readily available design formula information he regularly posts always is greatly appreciated.-
<br> Again hopefully many knowledgable catsailors will post and help walk us through the processes and give expert advice and direction to make this the excellent and exciting racing class I believe this will become .
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<br>-All the best
<br> Carl<br><br>