Originally Posted by crazychemical
there is on of the guys who frequents the free forum who created a sailcalculator. insert weight and wind and you get a sailrange. for beginners it's a good indicator. Usually when i'm unsure i look at what the others are sailing. Just try to find someone that has a kit that would be simular to yours and make the best copy you can think of. but in the end, it's pure empirical science. Like ken sais, too many factors.
I find it. Looks cool, just that I had to install the root of all evil microsoft exel on my poor mac.
But look grate.
A direct link:
And thank you James, his the inventor...