It's Pentex mylar and I really was impressed with chip's work - We spend every weekend chasing 5.8's and a Inter 20 so I wanted a bit more power - plus our old sails were at the end of their life. It was time to step up.
they are beutiful! Sorry 'bout the hi-jack, but couldn't resist when I saw your sail number.
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what the heck is that on your tramp? Is that some kind of beach wheels near the back beam? or are you sailing to a pugil stick contest?
how the heck did you set up to reef a mystere sail....
I carry three of those "pugil sticks" to roll the boat up and down the beach at the islands. We call 'em Q-tips.
Those rollers have traveled several hundreds of miles with me on that boat. I'd say that they've been used to roll the boat up and down beaches on various Channel Islands at least 55 times. They double as hull protectors when the boat is on the rocks.
I had reef points built into the original sails by Skip Elliott. I was satisfied with their performance so when I ordered new sails, I got them with the reef points in them. (EPsails)
Here is the answer from chip as to the way the sail is cut.
The new fabric FLEX13P from Dimension Polyant is the best of the cross-cut fabrics and works well with a your boomless system. Having the clew bar loads the foot of the sail not just at the corner with loads radiating out it's entire length. We don't want to load up the clew in the wrong direction, that will cause delamination. If you had a conventional setup (boom) then the tri-radial is more appropriate.
I looked at the Elliott/Pattison sails also, I have friends that just purchase a new main for their 5.8 and noticed the aluminum bar in the clew - Chip's sail does not but I'll live with that - still couldn't be more pleased.