Thanks alot Mark for your first report on running the numbers on your race data.

It makes me feel very good that the initial test shows some encouraging performance.

I'm looking forward to the report after you have run it all. You know some tweaking can still be done.

You what's funny, there are some points I think to be remarkable but it may well be that my own prejudice is unwilling to believe what the formula's are saying. So again, I'm looking forward to your commment and or report after you've run the data on it.


Texel data :

http://www.texelrating.knwv.nl/


Hobie 20 :

Best look up the Miracle 6.0 in the Texel rating and use that data. It is my believe that this boat is the same as the US Hobie 20 Miracle. One point of note though, Hobie NEVER officially imported the H20 Miracle to Europe. So these are "privately" imported boats and may have undergo some modifications with respect to the US versions. Never the less it is a good place to start.


Shark :

There is a shark catamaran in the listing but I'm sure wether that is the same Shark that you use in the USA. ONly way to know for sure is to contact the Shark class association and ask them about the specs.

I can tell you however that IF the Texel listing doesn't have the numbers on a boat that NO other rating system has them. Not ISAF and certainly not the Yardsticks. The Texel listing is by far the most extensive data base on catamarans around.

If a boat is still not named in the listing that the following rule of thumb works pretty well.

Length : Take the length overal or waterline length. The rating is not very dependent on which one you use.
weight : Often this is easy to guess. 14 ft = often about 100 kg, 16 ft = often about 135 kg, 18 ft = about 160 kg 20 ft = about 190 kg
Sail area = Take an F18 sailarea and scale this area in height to the mast area and in width to the hull length.
Luff length main = mastlength - 0.5 mtr. (a very good estimate)
Luff jib = nearly always between 4.25 and 5.5 mtrs. depending on the overal size of the boat. A rought guess will do here


Wouter