Re: Mainsail Design Question...
For around here, assuming you stay in puget sound.......a lighter stronger sail will be better for the lighter winds we have a tendency to have. So from that standpoint, a tri radial would be better.
Another option that I've noticed to be less than triradial, a bit more than dacron.....you may not like as it is all laminate, is the Ullman CAL sail. This is a cross cut laminate sail, maybe 20% ore than a decent made dacron. I have a 140 out of it, very strong pulling sail. Should have gone with my main that way instead of a string style. Talk to Chris or Jeff at the seattle loft if you think this might be a viable option.
I would not get a North norlam from my experience. These seem to have a short life span, shorter than some true laminates. The cal I have is doing better life wise etc than the nor-lam I have.
She drives me boat,
I drives me dinghy!