- Jan 4, 2013
This is the original 1996 Mainsail. Is the shape still good or is it time to shop for a new mainsail?
Let’s see it when you’re close hauled, please.I was sailing in about 12 knots of wind with the wind moving from 60 to 90 degrees. The wind swirls a lot around here, not just come from a steady direction. I will flog the crewman who raised the main and didn't get it tight (my wife).
That analysis is for this sail. It’s a bit off because it not taken from directly underneath the middle of the foot, but the distortion makes it look better than it is. If you enlarge it, you’ll see how I fitted curves to the middle three battens. The measurements are based on those curves.Dr. J is that table for this sail or is it for a file design parameter for a Catalina 30 Mainsail?
Twist is measured by the chord from the leading edge to the trailing edge. The chord at the 2nd batten is twisted 0.3 degree compared to the 4th. 188.6 degrees vs 188.9 degrees (But again, this picture wasn’t taken from underneath the boom)I see some twist, maybe about 5 degrees, in the OP's sail