Windspeed modification factors -

Per previous post ---only 2 --an upper and lower ,--trap used and not used conditions windspeeds are proposed---Most all could easily understand ,-accept and readily use this 2 windspeed system --trap and non trap av. conditions .
Beam -effects on upper windspeed =,-2% upwind - less downwind -variables between spin and non spin ,--average 1.5 for spin ,-and 1 for non spin types proposed average effects based on standard 8.5 beam cat design .
Beam may be taken from standard trailerable 8.5 ft beam as easily calc. point of beginning ,-each ft above would result in a lower faster rating for spin rigged cat designs . -example a non spin rigged S C with 12 ft beam would incure a 3.5 * 1.0 rating adjustment in the higher wind speed range. The spin rigged Tornado a 1.5 *1.5 =2.2.5 faster adjustment in the upper windspeed range rating .
Cat design with lesser beam below 8.5 would recieve similar calc applied reflecting less beam distance relative to boat and crew weight .
Wings would be calc with 0.75 of one wing width added to boat beam . this reduction to factor average hull weight/ -crew weight relative to beam effects.

Boards -
Current Texel allows 3% in differentiation between board and non board types which is accurate in the lower speed range ,-but changes as speeds increase .

Good explaination is mentioned by" Frenchie " in a design discussion post ,-
{This a phenomenon which is called "DYNAMIC SINKAGE" by naval hydrodynamicists and that corresponds roughly to an additionnal 20% of the initial weight over 18 kt. Now, if a standard Tornado can hold a 340 lbs Side-Force, the trigonometrically associated Down-Force at 12° heel is 340 x tan( 12° ) = 72 lbs, which means 10% of the 716 lbs of initial displacment of the crew...so Jake, you can see that "suction effect", far from negligible, is TWICE the DOWN-FORCE effect...}
end Frienchie --thanks -
Numerous other design related factors also help non board type design in the higher speed range ,-assymetric hulls ,-skeg efficiency increase , rudder configuration -rake etc.

The effects of this on non board types is more hull acting as lateral resistance to side forces at higher speed .
Daggerboards are at least partially retracted downwind ,-and often partially raised upwind in higher wind speed conditions as well .
A windspeed calc from 3% to 1% in the higher windspeed is proposed for non board types.

-Board type concerning angled and lifting foil types in the upper wind speed catagory will be required based on new design development . An added windspeed catagorization and calc where these become effective can be added .

-The rating rule ,-like the sport itself needs to periodically update ,-revise and develop.
Hope this helps form the basis for a N A Texel Rating System , more ideal for distance racing ,along with proper class oriented racing structure,-and applied for major races in N A .

Carl