Here are the Portsmouth and PHRF ratings, as reported by Montgomery sailors:
Portsmouth Ratings
The Portsmouth rating is derived from actual race results over time, and is one standard for all locations. From the US Sailing Portsmouth Yardstick explanation:
The 2008 North American Portsmouth Yardstick for centerboard boats, multihulls, keelboats and offshore classes are posted herein. The Yardstick is a widely used method of rating boats of different classes sailing the same courses and is used by clubs and fleets across the country. It is a time-on-time handicapping system and is derived from actual records of classes of boats with thoroughly documented ratings. Portsmouth Numbers are defined as the length of time boats would take to sail a common but unspecified distance. The formula is easy to use:
CT (Corrected Time) = ET (Elapsed Time) X 100 / HC (Handicap)
The 2008 Portsmouth Tables for centerboards doesn’t list the M17 (but has the M15 at 108.2), so perhaps its somewhere else on that site. But Steve R. on the montgomery_boats mailling list, found these numbers back in 2006:
Here are the basic numbers for Montgomery boats:
MON8 134 7-11 MON10 133 10 MON12 110 12 MON15 108.2 15 MON17 104 17 MON172 95.8 17 Fl.Deck MON17H 100.7 17 TM MON23 94.8 23 There are additional numbers by wind speed for the 15 and on up, but I am not certain the columns will come out so I will try to post only the basic information.
PHRF Ratings
The PHRF ((Performance Handicap Rating Formula") is intended to "level the playing field" when dissimilar boats are racing each other. The PHRF assumes the boat is sailing to its fullest potential, and the differences between the performance of the boats in the race is then decided by the wisdom, skill and perhaps luck, of the skipper.
The rating may vary from location to location, based on the local racing organization’s calculations. A single local organization may have different ratings for different sailing venues. The rating may also change as the committee looks at individual races. With that understanding, here are some PHRF ratings Montgomery owners have received:
David Fann, regarding his Montgomery 17 "Dulcibella", wrote on 29 Jul 2002:
The Rudder Club of Jacksonville (Florida) rated my M17 for the Mug Race earlier this year. The provisional rating assigned was 295. Following is part of an E-mail from their measurer:
Congrats on your new boat! The PHRF ratings listed in the U.S. Sailing Handicap book we use list your ratings as follows:
Augusta – 264
Austin – 294
Percy Priest – 258
Sail Colorado – 313
Yralis – 264
No rating was shown for Lake Lanier.
From the montgomery_boats maillist.
JDavies104, on 09 Sep 2008 wrote:
To add to the handicapping confusion, I have a PHRF rating of 296, issued this year by Chesapeake Bay Yacht Racing Association (CBYRA) for my M-17.
That takes into account a 135% roller furling genoa and no spinnaker, since I race non-spin.
From the montgomery_boats maillist
