Significance of PHRF ratings ?

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Oct 25, 2005
735
Catalina 30 Banderas Bay, Mexico
Re: Handicaps

"Then why do they assign ratings, and not handicaps? Curious." A measurement rule can take two forms. Some rules are written to create designs, like the Metre rule than the America's Cups was raced under for years. All boats rate the the same under this type of rule. (no handicaps) The other type of rule attempts to assign a rating to a boat base on measurements. A handicap is assigned based on the rating. the CCA rule was used for years. The IOR rule was created to rate *existing* boats more fairly (it did a pretty good job). As soon as the designers got into it, they stopped trying to build fast boats. They instead built boats that where faster than the IOR rule predicts. You might have a boat that was slow for its size, but fast for its rating. Designing to the rule perverted the boats and created an IOR type. IMS was developed to replace IOR. The program used to rate the boats was secret so the designers couldn't create rule beaters like they did under IOR. It didn't take long for the designer to figure out what made a boat fast for it's rating under IMS and has created an IMS type. PHRF handicaps are called ratings because sailors are used to thinking that way. Under CCA, IOR and IMS your boats rating determined the handicap. When you call a PHRF handicap a rating, people assume that the PHRF rule assigns handicaps the same way that the other systems do. PHRF is like a system that has looked at the relationship between height and scoring in basketball and assigns a handicap based on that data (proven performance). IMS, and Americap try to predict how a player of a given height will score and assign a handicap based on prediction. What sounds fairer to you?
 

Jon W.

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May 18, 2004
401
Catalina 310 C310 Seattle Wa
Thank You MB

Oh, I understand all the measurement rules vs. PHRF argument. "PHRF handicaps are called ratings because sailors are used to thinking that way." But this is the line that answered my question.
 
Jun 12, 2004
1,181
Allied Mistress 39 Ketch Kemah,Tx.
Really Useful Stuff......... THANKS !!!!!

I briefly looked at the sail calculator and it would be meaningless to me if it werent for you guys talking about D/L and SA/D etc. Im at work so i can get on here off and on all day, but as soon as i do, someone is paging me and i have to go out into the cold cruel world.
 
V

Vic

A J24 can beat a J30 ...

if the wind is light and the waves are flat and the sails are better, etc etc. J24 rates about 175, J30 about 145 ... J32 might rate a bit lower than a 30 because if I remember right it was a cruising adaption. Most of this is smoke and mirrors unless the boats are really in equal conditions ... best racing is a bunch of similar rated boats in similar physical condition ... other than that there are a bunch of alternative rating programs that take into account a bunch of other factors to "correct" Phrf screwups. Vic "Seven"
 
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