Ya mon .
Some official in the Texel rating may already have this number calculated.though don,t see it yet .
http://www.texelrating.knwv.nl/numdet1.html The I -20 NA version mainsail is 15 sq ft larger ,having a larger sq top main but same foot measurement ,-the area is along the roach mostly higher up, the sq top being about a ft larger .---not an advantage in higher wind strength when already overpowered as you typically sail in the Islands.
Texel rating would need to recalc. the rated sail area then enter this in place of the smaller EU version in the base power formula to arrive at a slightly faster theoretical rating number as result of larger sail area.
The original Texel rating intended to use 2 windspeeds ,but for simplicity did not , it instead makes adjustments periodically,as per recent change reducing the final factor in the equation which theoretically would reflect different boat finishes in higher wind speeds more accurately ,all being closer in total elapsed time as result
In Texel all Formula classes that use different jib sizes and spin sizes to various crew weight are all rated the same regardless of these varied jib and spin sizes .
see Texel notes on Formula classes -
The theory being the F-class rules that factor crew weight into the equation equalize them out ,
This may be best for the na version I-20 as well in higher winds particularly
The I-20 is a Formula 20 as raced in EU
ADDED problem -the na version also weighs 390 LBs rather than EU i-Formula 20 CLASS WEIGHT OF 418 lB
so a revised calc in Texel is needed there as well with revised rated weight-
For the NA Formula 20 proposed rules based on this popular I-20 version as compensation as per other Formula classes any heavier 20 ft cat of 418 Lbs or more would be allowed a larger spin area of +30 sq ft or more ,based on the 270 sq ft standard size. The standard 390 Lb I-20 would use a 270 or less sq ft spin ,and the EU version or any F-20 cat that weighed 418 Lbs or more would be allowed a 300 sq ft spin or less . The F-20s are already so overpowered with sail area that crew weight is a lesser factor and instead boat weight is used and is the variable factor rather than crew.
Larger crew often have the advantage on 20s.
One International combination Catamaran Rating sytem anyone?? Portmouth Texel and ISAF -combo-
With the integration of numerous international cat classes -A-Class -Formula Classes etc ,-and the desire for good class racing groups -it is time for a more complete universal integral measurement based rating system
The real goal of a design-measurement rating system is to encourage larger class racing and Formula groups ,-equal group boats based on similar length weight beam and sail area , over time better race organization and a target for new boat designs in already established larger race groups .
This circumstance is a good example of how we could rethink and try to connect better with catamaran sailors internationally.Nations Continentals -Worlds Olympics and major special events with international competition are great fun .
hope that is helpfull
end sailing rant for the day
