sboardcrazy said...
I suppose a heavyweight would need to buy some larger boards whereas I'd need smaller..I was thinking that for the same skill a large guy would have a bigger wind range..? Be able to hold down the sails longer.
Just to clear this up for you, a heavier person is going to have the same issues with a quiver of sails to cover the same wind range as a lighter person. You don't just use one sail in anything from 16 knots to 30 knots. Well, you could, but its not fun.
I have noticed that in the past my friends might have 4.5m, 5.0m, 5.7m, and 6.5m sails, where I would have a 5.4m, 6.0m, 6.5m, 7.5m, and also a 8.5m. We would still need to change at roughly the same point, and any time when I didn't I attribute purely to skill

For them, a 7.5m and 8.5m were not needed as the 6.5m gave them enough grunt in any wind they wanted to sail in, and for me the 5.4m and 6.0m were for exceptional windy days. I don't know what 4.5m sails are useful for...
I suspect the relationship between weight and sail sizes is logarithmic, based on the power versus sail area. It applies no matter what weight you are.