Suggested the Tybee 500 race and Texas 300 ,-and all future racing in N A consider better rating system options and establish its priority in use of categorical class oriented structure in all regattas and rules ,
and the basic structure N A catsailors race under change for these logical practical reasons -

-1-The huge majority of catsailors in N A per demigraphics are class oriented --Hobie class --largest -Performance classes inc -Nacra Inter Prindle --A Class inc numerous excellent builders -
NEW Formula class categories -16 -18 18HT -20S that include Hobie Nacra Inter Mystere -Stealth and many other excellent builders and includes any builder that designs and builds per class specs.-It also allows many boats to modify to class specs or equal rating .
all others are a small percentage of the total -
but need to be included in categorical class or improved form of rating that encourages them to partisipate .

2--Racing should occur per categorical rated class -for reasons above .-
A class -uses a basic box rule - several other classes similarly -inc.
Formula classes similarly based on Length sail area -weight -beam .
-This produces the best boat in length w class category based on design -quality ,-better hardware sails ,-better parts supply and quarentee and warrenty etc ..Better safer faster boats for N A catsailors .

NOT because it has an H or N -or I OR WHATEVER on the sail per brand marketing monopoly and numeric DOMINATION .
The best design and builder per categorical class of length beam sail area and weight is the ideal goal for the sport .

3-Change to a better combination rating system that encourages this categorical class racing per design measurement rating base .
proposed -outlined -This along with established categorical classes allows new design to be built to a class spec. having an immediate large class to partisipate in at any future event ,-and internationally .

4-from this improved rating system add an intelectually honest form of handicap per individual ,--just as golf does .
Rank sailors as T class does per results similarly done now ,-apply this to individual handicap ,-add category at races for this to encourage new sailors and youth sailors by awarding them a trophy for improving their H C most .-Many sailing clubs use this now .
Gary Jobson and numerous other noted sailors descibe a similar future for the sport as a better method to encourage its growth.

-5 New better more accurate verifiable rating will increase interest and help classes grow being integral with them .Most new race activity is towards A Class and Formula class racing which will increae each year in N A as it continues to now around the globe .
Builders -boat dealers all will benefit from increased total partisipation .
Encouraging class oriented racing and individual handicap will encourage new sailors and youth sailors into the sport .

More great events and sponsorship is another important aspect .
Looking forward to the 2nd annual great Texas Race,--the Tybee race ,-and future Worrell 1000 races in Formula Classes and improved rating system .

Believe people that want what is best for the sport long term that take time to comprehend the larger picture will eventually understand the merits and need for improvements.

The existing P RATING Committee should understand the merits and much more accurate combination rating system ,-along with the existing P rated aspect of handicap added factor for older design also combining the base Texel rating and aspects of ISAF rating to improve it .
Develop this internationally integral system then focus their efforts and goals towards the added individual rating aspect that will further youth oriented programs they have begun and really help new sailors clubs and local fleets promote the sport.
New catsailor friendly approach .

This current system of rating per skippers ability in each brand class is not ------
-It is easy to comprehend -average times ,-but just seriously flawed in so many regards and deters people from racing rather than encouraging them . It categorizes sailors by brand which perpetuates the division of N A catsailors by brand type .
P rating allows handicap by brand based on those skippers abilities currently sailing that particular brand .

Why rate sailors ability by average time then catagorize them in brand type ?

The other more accurate combination rating will accomplish the rating of designs more accurately but has the added advantages of the induvidual handicap aspect to promote and grow the sport .
Plus the added advantage of being more accurate ,-continentally and internationally verifiable ,-integral with categorical class groups per design rating and really helping these classes to grow also .
will just stop there

Happy Superbowl Sun .
Carl

You really need to write a book.... or something...

working on a giant squid joke -book


rating is boring and most do not comprehend design or speak the language so ,--if people do not comprehend basics how can they understand a design measurement rating system --though better in all regards ,--that is the dilema .

There has been so much negative ,deroratory comment and opinion about design rating here that most have misinformed bias closed minds .


This structure and racing --in N A and internationally has much broader more potentially positive effect than most comprehend also .
We --as a nation need to reach out more in all areas of human endeavor particularly in a sport as international as sailing. . It is worth the time and effort .
We can not be isolated arogant apethetic Americans , not now in an ever smaller world we have to live in now,-given current world status.

Would really appreciate some other very knowledgable catsailors taking up the cause for this needed change and obvious improvements to the sport ,--

,-write each day as a form of exercize ,-just like going to the gym or swim in the evening ,--don't always post -{thank goodness eh }

Will try to finish up the sqid joke book ,
this rating system ,-hopefully with others
and get on to more interesting subjects ,

-Keep telling Rick we need a Cat sailing girls gone wild video ,- --hows that

have fun --its sailing

Carl,

If you're interrested in how to calculate a different rating for different wind strength's, Nico Boon has written some documents about this subject.
You can find them under: http://www.texelrating.knwv.nl/stabformulas.doc
and
http://www.texelrating.knwv.nl/stability%20influence%20on%20TR.xls

Geert

Thanks Geert

greatly appreciated .

Texel rating base works really well with its simple power formula that expresses the longer versions of earlier rating systems like the current ISAF which produces very similar end rating numbers .a brilliant system

Interesting reading ,-noticed the title of stab calculations ,-seems like part of the basic building blocks of rating being explored in static sail area calc to righting moment .

The other big part is drag ,-increased frictional and form hull drag ,-also areodynamic on the mast and sail once overpowered .
A noted designer put it simply ---
Upwind power is directly related to beam in trapezing conditions, so 10 % extra beam produces 10% extra forward drive, but drag is related to the cube root of speed so 10%extra power will result in about 2% extra speed,--

-here is another on sail area forces from another noted designer -
The force of the wind on the sail varies as the square of the wind speed. If we pick 10knots as a basic average sailing condition, and then consider a 12 knot breeze, the force of the wind on the sail and the overturning moment are up by 44% greater than the in the 10 knot breeze. If we consider a 15knot breeze, the force of the wind on the sail is up an additional 125% over what it is at 10 knots. At 20 knots the force of the wind on the sail is 4 times what it is at 10 knots, etc. All this time the righting moment is constant. The boat speed is going to be a max when the overturning moment from the wind in the sail equals the righting moment of the boat plus crew. So, there is no perfect mast and sail area to boat length-beam weight ratio. The ideal changes with wind speed.
end design notes -
we have to assume all designs may reef sails or not equally per original design ,-this already factored into base calc as r sail area .-How much each reef per design variable is an unknown ,per designer .
We may limit this portion to up to 22 ft cat designs as ISAF does ,-This size range because of larger proportion of crew weight ,-and on wire aspects do not rely on reef systems to date ,--that changing on more modern design for distance racing . A seperate category for larger cat design ,-and possibly as reef systems for smaller cats are developed and used ,then a seperate future category -upper high windspeed may be added in use when reefing becomes effective.

-we have sail area -length -weight in base calc .
beam seems to be the main factor not expressly included that can be factored into the upper wind speed when it becomes effective .
The other factor downwind is forward moment and resistance to pitch . volume in bow sections is a main factor along with several others ,-but adding more drag and form resistance through the water at higher speeds as forces cause hulls to depress further . Displacement is often used in ratings also but static and non static force calc becomes equally changable in each wind strength.

Calc of beam effects per outline in the upper range seems key .
board correction is needed also .

Similarly changing the constant in the base formula as was adjusted recently would allow movement to reflect the upper wind speed faster actual boat speed relative to all design .
Further narrow and increase each proportionately along with beam calc .
Elements of design that are attributed to good light air performance ,--light weight --larger sail area and aspect ratio are the reverse comparitively in the upper wind ranges where lower aspect sail area and more weight inc crew are attributes to increased speed. L in the formula should change also .

P rating adopted 4 windspeeds ,-movement seems to average 3 to 4 points in class categories , this helps provide a realistic comparative percentage in the 2 winspeeds proposed .
A non trap windspeed below 8 --mid 3 B f scale ,--and a on trap upper windspeed ,--apparent to all .
It is also where the biggest speed differential occurs ,-as crews get added leverage and drive on the wire extending beam effect and as one hull lifts reducing drag .

Being developmental as all rating systems are it will take some refinment but seems the movement on average along with beam calc for each rating will be an accurate average per windspeed range in design relation to one another .-Not yet familiar enough with the rating to understand it completely in adjusting for windspeed .

P rating is important ,-combining it as a handicap added factor to base Texel and new windspeed will help older boat design with lesser features per original design criteria .Factors that Tex does not consider common in older design ,-heavier larger mast sections and rigging ,-sail materials ,-etc .

Interesting combination rating system ,-times of course are needed to compare rating accuracy .Verifying accuracy is of course the current problem with P rating ,-asumtions made on skippers abilities are so disproportionate as we see in race results and proposed fixes to the timed only system .

The added feature once rating is changed is to add the individual handicap feature to the sport ,--like golf does,--it will really help promote it .
The other huge benifit is verifying rating accuracy once that occurs .
Example --if racer X wins on a particular class boat and time recorded as say a 5 handicap ,--then compared to racer Y who wins in more competitive larger class and has a 0 handicap then ratings can be annalyzed with the average handicap time difference factor providing realistic averages .
A 5 may mean a 5 minute difference per hr of sailing time .
It is one realistic way to verify ratings that help the sport grow .

-The other added aspect of rating in spin calc per ISAF at 10 % of sail area is integral and accurate ,-current Tex. uses 11% as area over penalty which coresponds .

-whew -
just need to hire a statistical annalysis to run through the trial calc and rating .

Believe the 3 revisions to base Texel
1-spin calc added per ISAF calc method
2- Upper windspeed added category
3-is handicap added factor per P rating .

These are needed to be accepted in N A

In theory a very accurate combination rating system ,
with added advantage of being integral and helping grow formula and development classes along with the added individual handicap feature to help promote the sport for new and youth sailors . Also helping the sport with ranking handicap and verifying rating accuracy .