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Old 03-17-2015, 11:56 PM   #21
LarryM
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City: League City, TX
Vessel Name: Pelago
Vessel Model: Wellcraft 3300 Coastal
Join Date: Aug 2011
Posts: 1,069
Most successful motorsailers have SA/D (sail area/displacement) ratios between 12.0 and 14.0. Assuming your boat has a displacement of about 23,000# your rig should have a sail area between 610 and 710. SA/D of less than 12.0 will leave your boat underpowered, even by motorsailer standards.

The Island Packet 41 SP has published sail area of 733 and a SA/D of 14.5.

The idea of a fully-battened main with a solid vang, and a self-tending jib of less than 100% foretriangle would make it a very easily handled rig. I doubt that you need electric winches, but you definitely want to use the factory chainplates. The forces generated by a rig that size on a boat of that displacement and beam increase very quickly.

You can run the numbers using this SA/D calculator.
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