http://www.catsailor.com/bb_files/28263-smnacra2.jpg Hi John hi Steve
There is the post that Dick L provided earlier on the N 18 SQ basic lines . hope that helps
John ,--great post on the Formula 14 new class and helping get it going ,-It should be a fun class and hope the final Formula 14 class rules allow for both a production boat class based largely on the Mystere 14 ,--and also an open category sub class of Formula 14s within as proposed on the F-14 forum .
The concept is very much like the 18 sq meter class of earlier decades that can have a {production }boat like the Nacra as a part of it ,-or allow custom boats to be built with more development and interesting ideas added ,they used 2 categories .
Hope you forgive my sometimes unusual sence of humor and small town outlooks and hope the concept of design measurement rating ,-improving it ,and it being much more intergral with these types of 14 16 etc Formula classes based in design measurement is beginning to make some sence .

ISAF provides the means of standardized measurement proceedures and required definitions which are the basis of these classes and the basic language used to understand them .
http://www.schrs.com/schrsdiagrams.asp?id=boat But ,It is all just sailing ,--fun stuff , and try to go with the flow ,-but it seems N A is slowly backwardly going this general direction .
You see it in the enthusiasm for the new F-14 class ,
and here in the interest in 18 sq ,-though old and in need of updating.

Steve ,-really like your new spin rigged version 18 sq as proposed , the added length to 20 is the right remedy for the added spin forces at work ,-but it is no longer an 18 sq ,-but isn,t with a spin added anyway,

though sounds really expensive with marstom mast and c f hulls . Do you have an estimated cost ?
I would really enjoy building a developmental cat design again , though currently have a SC 15 --A H-18 plus another H-18 platform -a Mystral board ,-cayak -and Inter 20 -
Would like to modify the SC 15 to Formula 16 class specs for my boys to potentially race ,--same with the H-18 ,needs a spin -snuffer and a modified category F-18 class to race in . Would like the Inter 20 to eventually become the basic of a Formula 20 comperable cat class for all 20 ft cats. Imagine a ht 20 will be out in future years comperable to the Marstom 20 or Ventilo 20 by MM .
I did recently draw a basic set of lines for a planning hull spin rigged 18 sq , though would start with a 2 in = one ft --one meter type scale model first.
The nice part of a 14 open F-class is the reduced costs in that size range being able to experiment with ideas and concepts inexpensively ,--relatively speaking ,-mainly by retrofitting existing parts and beams boards rudders etc from other existing boats - --which I have

I,d reall like a Formula 60 ALSO

,-but that has to wait , unless you have a multimillion dollar sponsor set to go or I find one to send the team to race in the Euro circuit .
http://www.parlier.org/site02/accueil/1024x768.html I,m ready ,--sign me up .

though most likely will settle for the Atlantic 1000 on 20s --
again