Some of you may remember my article on finding the right mast for the
North sails that I have. I came to the conclusion that the North constant
curve masts gave better results than the flex tops even though officially
North recommended the flex tops.
I have the 1993 "North Sails News" in front of me and it seems that now
North has 5 different flex curve classifications. The mast that I'm using
now (that I found to be optimal with my Gamma 5.5 and Infinity 5.0) has
"Mast Curve 2". Of course the new sails may require different masts, but
according to North, MC2 is ok for the Infinity 5.0 and Prisma 5.0. For the
5.5, the recommend MC3 or MC4.
The new classification do not prove that I was right or wrong, but they do
show that selecting a mast for a modern can be really tough.
The conditions here have been quite unusual. Usually I get to use my 3.6
once or twice during September. This year, I sailed twice in September.
Once with the 5.5 and once with the 6.5 (mostly non-planing). This
year has indeed been strange. (July is normally the "off" month, but this
year I sailed more in July than in any other month.
Juri Munkki Windsurf: fast sailing