Hmmm

ARC 22 ODR spi (SC22) ARC22 57.0 60.4 57.8 56.7 55.3


Marstrom 20 carbon spi M20 58.0 61.0 59.0 57.5 55.0

Nacra F20 NF20 57.9 61.8 58.2 58.0 57.3

I am a bit surprised that the F20 is slower then the ARC 22! Having the rating a microsecond faster then the M20 is just politics. (it's an insignificant difference)

Texel ratings for 20 footers'

Nacra 20... 96
Tornado... 94
Eagle 20.... 89-96 (multiple configs)
Marstrom 20... 85 to 91 (multiple configs)
Nacra F20... 89
Hobie Fox Concept 89

So... on average.. the new carbon boats are 5 to 6 minutes per 100 minutes faster then standard fiberglass cored boats.

The fatal problem for USPN is this... from USSA PN site.
* That each boat placing first in each class was sailed to its true potential by a perfect crew according to flawless strategy;

Translated... this means that when you sail the any boat to its number you win. So... when you are the only boat... you sailed it perfectly...and given the numbers of US boats.
F20 1
M20 2
Arc 22.... 10?

The finish times of the single F20 will represent a perfectly sailed boat against the rest of the fleet.... By definition! pretty soon.... the F20 rating database is simply the owners personal handicap data ...It is not a measure of the boats performance... (unless you think Mike always sails perfect races)

The Portsmouth math simply won't work to generate an accurate rating for the F20 with so few boats out there racing in the US.

We should just use Texel or SCHRS measurement handicaps and stop pretending that PN will work for these new designs in the current environment.

Alternatively... just bracket the boats that use a guesstimate of the USPN rating (based on Texel or SCHRS) and freeze the USPN rating until a fleet materializes and the statistics have some meaning. I would say that a class needs a One design schedule and sufficient multiple boat data points in PN races before it's rating can be unfrozen and the bracket removed.

The world is unkind to boats that don't sail to their measurement rating... (especially if they don't get enough support to form a One Design class)

crac.sailregattas.com