What a guy ! - thanks wout ,--and thanks Marc for working on this sail area to weight formula and much needed valueable information . <br> One huge problem we are facing here in the U S in promoting ALL formula classes is as I,m more readily understanding each day is a lack of general knowledge on catamaran design. <br> People will not be likely to become interested in something they do not understand . There is no readily available information on cat design elements , or how they effect sailing performance . There is no readily available easily understood articles or information on ISAF rating , -though there is a brief explaination of Texel . <br> We need some good articles explaining design elements and how they are measured . The board ratio calc . is a good example , most will not understand why a board calc. would be needed or how different a Hobie 18 board is from a more modern Inter 20 board , wetted surface areas their effectiveness , cord section etc . <br>-I,ve build one cat and have a basic understanding of design , though do have an extensive cat racing background for practical application , <br> <br> Promoting the formula classes will involve an educational process , the U S has used Portmouth rating ,--an average time system , they have added design modification factors in an ever growing list . --The rest of the cat sailing world uses ISAF -and Texel design measurement ratings so naturally people who are accustom to design elements as a basis for rating are more familiar with what aspects make a good fast seaworthy cat design. <br> <br> -Lets all try to work on making all information readily available for all formula cat sailors. <br> <br> Carl<br><br>