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I just received my PHRF rating certificate for PHRF-NW. Bob Aman had #71 registered in 2021 with 159 (the standard in PHRF-NW is 156). I received a 154 as the handicapper determined I had a nonstandard spin pole/bow sprit which increased the SMG from 17' 8" to 23' 7". The handicapper used 12.79' as the standard bowsprit length which is the same number as the JSP in Figure 7 on page 18 of the class rules. I almost used the Class Rules JSP, however trying to be honest, as the definition of bowsprit length is the measurement of mast face to spinnaker tack point I used 13.12' which was based on Figure 1 on page 12 and rule 9.1:
Mast face to stem + stem to tack point on bowsprit (tack point is 1" back from the end of #71's bowsprit)
87.5 (Figure 1) + 70" (1" back from full extension) = 13.12'
Is the JSP number in the class rules in correct? Is this a legacy from when the boat come with Symmetrical or Asymmetrical spinnakers?
I reverse engineered the JSP number. It appears to be J dimension + 70" or 83.5" (6' 9.5") + 70" = 153.5/12 = 12.79'. The issue here is the the J dimension is the mast face to forestay attachment location which is about 4" inboard from the stem.
Adding 4" to 153.5 is 157.5/12 = 13.125'
Has anyone had similar issues or is this why OD racing is superior?
Kind Regards,
Ryan
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