PHRF Math

[Steve Hornberger]

I am looking for the official mathematical formula used to compute the base PHRF ratings for all Hunter models? It would seem there has to be one. Somewhere, I believe access to the official formula does exist, but where?Thanks,Steves/v Sun Runner, H37.5

 

[Michael O'Hara]

Doubt it....

PHRF numbers are generated in local fleets, although the basic PHRF seems to be relatively constant (my H25 varies from 222 to 228). The formula is a bit esoteric....... depends on what your fleet considers "standard equipment".There are a number of good websites that explain it all, specifically the Lake Ontario PHRF organization - I think it's www.phrf-lo.com, but you should use a good search engine to locate a bunch of these sites. Dogpile and Metafind found a TON of them!Michael O'