musicman wrote:As for your local PHRF board you should be able to sort it out with them. If you look at ECSA, PHRFNB, PHRFNE and many others you'll notice they have a section for increased E. If you send all this to your board with an idea of what you want to do (10% or 15% over). I'm sure the worst case rating hit would be -3, and that would be for 15% over.
Ahhh, I found it. I guess I just spend too much time online and if I can't find it online then I ass-u-me it does not exist.
If I read the nice little book they sent me then I would know this stuff, slap myself!!!
PHRF of the Chesapeake says:
"... based on percent change to the calculated 100% Sail Area (SA)....
2. Guide for P alone, E alone, or P& E together ...
a. Adjustment = 3 sec/mi for up to 5% change
b. Adjustment = 6 sec/mi for over 5% change"
That will allow me 22.05 sqft, 5% of 441. Or 44 sqft for for 6 sec/mile hit taking the boat to a 90. How much of an increase in E are those?