PHRF rating for a PDQ32

[Old PDQ Message Board]

PHRF rating for a PDQ32

Posted September 03, 2001 at 21:40:00:

Someone was previously asking about PHRF ratings for a PDQ32. I have found two:[/i]

Dave Harris, Concerto in Sea
PDQ-32 (No Spinnaker), PHRF 231
Bay Area - http://www.wingo.com/bama/2001/ratings.html
Windancer, Larry Linn, PHRF 135
http://www.pgscweb.com/race/IClub00-01Stand.htm
Punta Gorda, FL
I do not know which hulls these are, or whether they are the higher stick, or
not



Follow Ups:

Re: PHRF rating for a PDQ32 Larry Linn 13:30:58 12/19/01 (0)
Re: PHRF rating for a PDQ32 Chris Nielsen 00:47:32 09/04/01 (0)

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Re: PHRF rating for a PDQ32

Posted by Larry Linn on December 19, 2001 at 13:30:00:
In Reply to: PHRF rating for a PDQ32 posted by Kevin Smith on September 03, 2001
at 21:40:00:

My PDQ is 32034, a tall rig (lots more sail area than the earlier PDQ32s. Got the number
via e-mail from a guy at SE Florida PHRF a few years ago. He had found a PDQ 32 rating
somewhere in the Northeast

Racing non-spinnaker in light air, I get my clock cleaned. In 15-20 I can
compete.

Follow Ups:

Re: PHRF rating for a PDQ32

Posted by Chris Nielsen on September 04, 2001 at 00:47:00:
In Reply to: PHRF rating for a PDQ32 posted by Kevin Smith on September 03, 2001
at 21:40:00:

Concerto in sea is hull # 10 and therefore does not have a tall rig. I just
recently tried to buy it, but the owner decided not to sell.

[Phenix-former-owner]

This is an older thread, I wonder if anyone has an update on this?

The only one I can find is this old PHRF from 2001:

Dave Harris, Concerto in Sea
PDQ-32 (No Spinnaker), PHRF 231

Anyone with a PDQ 32 with a PHRF rating, or know of one?

[doubledutch]

I don't know of any new numbers but I must say I am puzzled by the 231 - my previous boat was a Beneteau 331 with shoal draft that had a phrf of 165 and I know my 32 does at least as well hard on the wind and would run circles around the Beneteau on all other points of sail so I would expect a lower number.

[Phenix-former-owner]

I too, was very surprised at 231. It comes from here, which is a race analysis of a 1999 race in SF Bay in 1999. Her previous PHRF was 195, then adjusted to 231 based on race result:

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Link: http://www.sfbama.org/1999/99analysis.html
PDQ 32 shared a course with F25C in 2 races, Dgnfly in 1 race and F27 in 2 races. She is 12% slower than predicted compared with F25C and 8% slower than predicted compared with F27. The PDQ32 was slower than predicted an average of 10%. Consequently, her TOT CF and PHRF ratings will be adjusted.

Calculation: PDQ32 and Seawind are the same "class" of boat (that is, boats that do not normally exceed hull speed). Her current assigned TOT CF is 0.8099, Seawind's is 0.8765. The ratio of the two boats is predicted to be 1.082. However, PDQ32 is 10% slower than predicted (but we will only adjust for half of that (Assumption 5)). Consequently, the speed ratio is 1.136. Working backwards, then the TOT CF of PDQ32 is 0.8765/1.136 or 0.7716. The new PHRF for Concerto in Sea, therefore (corresponding to TOT CF of 0.7716) is 231 seconds per mile (from 195 seconds per mile, which is her current assigned PHRF).

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I'd like to find out other PDQ 32s that have a rating - kind of like a second appraisal.