Way to go Wout , it furthers efforts to understand design and helps establish F-type classes -sounds good .
Think the ISAF or Texel are just for quick comparison purposes ,--but not to base a F class on . They should just be used as a snapshot ,-much like a Pn # - and hopefully be within 2 points or so of each other in class when comparing different brand types once modified to max class specs. ,--If not then examine why , often its a clitch in the particular rating system that can only average out numerous vastly different design features --boards to non board types --hi aspect sail plans to low --very heavy to min ht types --etc .
In examining the same types of very similar theoretic designs in a class definition you could actually use existing design software than would examine and compare in great detail the numerous specifics of design and calc. theoretic speed potential in each windspeed then average those in a mid range ---but still an average that varies greatly in conditions ,--also greatly mainly with human ability and other intangables like specialized sailing techniques developed by racing sailors not considered by the programer or designer .--
example --on I 20s many teams will center the rotator on the CF mast w spin up going downwind ,--the rig flexes much more in gusts creating a pumping type action that accellerates faster . This is just one of many , also learning to tune a boat for varied conditions makes huge differences on the race course and in theoretic speed .
how can any equate that?
Any rating "system" is imperfect and an average to some extent .
That is why CLASS racing is the ideal ,-and Formula the best means of including all within a basic box class category .
Concluded that and thought it better to work within ISAF or Texel and just promote Formula type clases .-
A detailed design annalysis would include such comparisons as hull design and form drag with frictional area drag .
Calc the area of wetted surface both static and under various wind strengths and degrees of heel ,-and in seas .The prismatic coeficient ratio of various hull shapes . Volume calc , section comparison ,-stern design and form drag annalysis , then the foils -boards rudders -
hull finish. -weight distribution -moments etc -on to the mast sail plan etc etc etc . It is a very lengthy process full of condition variables compounded by an infinite number of combination design features and new innovation and design add.
It is a fun endeavor , and such a great sport , hope all enjoy the process and appreciate the people involved .