This is what we do at our club, Tiburon YC on San Francisco Bay. We take the PHRF rating and if the boat is sailing non-spinnaker we add 18 seconds per mile to the PHRF rating. We have done this for over 15 years ago and it seems to work in our mixed fleets.
On Friday, March 20, 2015, Eric Baumes via CnC-List <cnc-list@cnc-list.com> wrote: > For racing on Long Island and the Hudson River the spin and non-spin > ratings are not intended to be used to combine fleets. > > These ratings reflect differences in a boats ability when racing in either > a spin or non-spin fleet. For example if you use a spinnaker pole as a > whisker pole in non-spinnaker you can get a credit. Also a boat designed > with a standard blade jib is seen to be at a disadvantage when racing with > out a spinnaker as they have less sail area in the jib to project to > windward and may get a different non-spinnaker base rating. > > Eric > 34/36 > > > On Fri, Mar 20, 2015 at 9:45 PM, Joel Aronson via CnC-List < > cnc-list@cnc-list.com > <javascript:_e(%7B%7D,'cvml','cnc-list@cnc-list.com');>> wrote: > >> Rick, >> >> This has been discussed recently for shorthanded sailing on the >> Chesapeake. Bottom line is there is no way to race spin and non-spin >> together fairly. You can come up with a differential, bu it nothing more >> than a SWAG >> >> Joel >> >> On Friday, March 20, 2015, Rick Brass via CnC-List <cnc-list@cnc-list.com >> <javascript:_e(%7B%7D,'cvml','cnc-list@cnc-list.com');>> wrote: >> >>> OK. I know this has been discussed before. But I just spent almost two >>> hours in the mail archives rereading a whole bunch of previous messages, >>> trying to come up with a consensus opinion on how to adjust PHRF ratings to >>> allow spin and JAM boats to compete in a single (small) fleet. >>> >>> >>> >>> What I firmly believe I have discovered is that, sort of like economists >>> and politicians, if you laid all the opinions end to end they would never >>> reach a conclusion. >>> >>> >>> >>> I know that a number of PHRF organizations give a boat both a Spin and a >>> non-spin rating. And I understand that local some local organizations with >>> small fleets running in a single event will adjust the ratings of boats in >>> non-spin to promote more even competition. From what I can see, the credit >>> for running non-spin seems to be in the range of 10-18 seconds, or 10-15% >>> of the boat’s PHRF. >>> >>> >>> >>> What I’m trying to do is plan for a “C&C Cup” to be run as part of a >>> local charity regatta called Pirates on the Pungo, in Belhaven, NC on the >>> weekend of May 15-17. More on that later. >>> >>> >>> >>> The race on Saturday is a longish (10-12NM) pursuit race that starts and >>> finishes in the harbor and has north, south, east, and west legs. I know of >>> about 15 C&Cs within a day’s travel of Belhaven, so I’m guessing the fleet >>> would include 8-10 boats, with some cruisers and 1 or 2 real racers. To >>> promote camaraderie and competition, and also so I don’t have to pony up >>> too much for the prizes (the winner will get a half hull of his own boat >>> made by Andrew Burton), we would have a single fleet. >>> >>> >>> >>> So help me here: >>> >>> >>> >>> How does your local PHRF or sailing club adjust the ratings between Spin >>> and JAM to allow both types of boats in a single fleet? And how equitable >>> are the results based on your experience? >>> >>> >>> >>> >>> >>> Rick Brass >>> >>> *Imzadi *C&C 38 mk 2 >>> >>> *la Belle Aurore *C&C 25 mk1 >>> >>> Washington, NC >>> >>> >>> >> >> >> -- >> Joel >> 301 541 8551 >> >> _______________________________________________ >> >> Email address: >> CnC-List@cnc-list.com >> <javascript:_e(%7B%7D,'cvml','CnC-List@cnc-list.com');> >> To change your list preferences, including unsubscribing -- go to the >> bottom of page at: >> http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >> >> >> > -- Ian Matthew "Siento el Viento" C&C 29 mk 1 San Francisco Bay Sent from my iPad using Gmail Mobile
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