Stephen,
Do you have a link to the numbers you quote ?
Because when I google VYC yardsticks I end up at this link :
http://www.vic.yachting.org.au/site/yachting/vic/downloads/Yardsticks05_06%20new3.pdfWhich specifies :
F18 70.00
F16 71.00
A-class 71.00
And that is what I remember from the race results that Gary'd put in.
A difference of only 1.4% in time relative to the F18's or 51 seconds slower per hour of bouy racing. A number very much in line with Texel rating 102/101 = 0.99% = 36 seconds slower per hour bouy racing.
SCHRS (ISAF) for 2-up mode gives 1.008/1.005 = 0.30% or 11 seconds slower per hour bouy racing. The SCHRS 1-up rating is waaaaay off though.
The USPN rating hads been moved to the same ratio ; 63.0/62.4 = 0.96% = 35 seconds slower per hour bouy racing.
I think this situation has existed for 1.5 years now and seems fair in my opinion.
So, the F16 Yardstick is still 2.5 minutes for every 100 behind the F18, but only .5 Minute according to Kurnell.
I think you make a small error here. The Kurnell ratings you provide suggest that the F16's are slower then the F18's over 100 minutes of racing by 0.74% or 44 seconds = 0,75 minute. For an hour of bouy racing the difference is only 27 seconds; very much in line with the other rating systems.
They may actually be doing the right thing at Kurnell.
Thanks,
Wouter
