Mike:

I used the dPN number for my calcs. I didn't want to get too complicated. Since the Texel does not have different numbers for wind strength, I would expect the middle ranges to be more comparable. This shows the main weakness of Texel.

Mark:

I did not say "assuming linear performance", I said "linear rating systems", which is what Texel and Porstmouth are. The fact that boat performance is not linear is why the Portsmouth system uses different wind ranges and even separate adjustments for distance races.. It is a simple, though time consuming, way to make NON-linear adjustments.

Clubs should always use a windspeed PN, even if it is an average from the entire race.

Carl:

Thanks. I hope my little exercise has validated BOTH systems and that it will silence some of the naysayers from both sides. I do believe that the added complexity and work of the Portsmouth System, increases the "fairness" of racing. Big thanks to Darlene et al.

P.S. I wasn't kidding about the Shark :-) LOOK OUT ALTER CUP!