[quote=robpatt]check the portsmouth tables... off the top of my head you can/may/should take ratings adjustments for:
- non-class legal mainsail (regardless if you're class rating, it's not the sail the boat was designed for)
- non-class legal more than 5% bigger than the original sail
just do the math on original square footage of the main compared to your new sail to see which adjustment is appropriate....
on my H18 I made lots of changes and the ratings adjustments usually confounded the RC:
- non class legal main (but NOT 5% bigger) had a square top
- barely underweight (there's a sliding scale adjustment for got what it was)
- eventually I used an SX jib.. higher aspect than stock H18
- ultimately a spinnaker....
LOVE the Hobie 18 and still sail one when I can, but ultimately I went to a new platform that all these things were designed to be in harmony w/eachother from the start....opened up a whole new world of sailing. (moved to F-16 if you're wondering...)
Bottom line, do what you want and have fun. :-)[/quote]
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