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Minimlist sail physics
Background, then a question for those experienced in sailing physics:
I have a lateen sail for use in an upwing sailing rig for a kayak. I can rig the sail as a traditional lateen. However, by attaching a gooseneck to the front tip of the spar I can also rig it is a sliding gunter. The latter has advantages (can shorten the mast yet get the sail higher off of the water, more headroom below the boom, sail can be slackened in higher winds as a substitute for reefing). Is there an appreciable difference in sail efficiency between these two options? If the sliding gunter is as, or more, efficient, it seems like a better alternative.
With some modification, I could also rig it as a crab claw, though without the vortex-reducing, scalloped leech. By removing the boom, I could rig it as a loose-footed delta.
Any comments regarding the efficiency and handling characteristics of the alternatives?