The term motorsailer often used as a criticism for poorly designed sailboats. A good motorsailer is specifically designed as such, and has many advantages over the average sailboat..
This is what Bill Kimley from Seahorse Marine
"So what's different about a motorsailer? The motorsailer is a vessel that sort of sails without a motor pretty well, but not real close to the wind, and can motor along without sails OK, but may be a little stiff. A stiff hull
is shaped to resist rolling. It carries sail well but it likes to float with its beam water
line parallel to the water surface. A lumpy sea presents many inclined water surfaces and a stiff hull
will snap around trying to parallel each one as it passes.
of a motorsailer has to make the decision to exclude good upwind performance. Accepting that compromise allows a lot of neat things to happen, lighter weight, shallower draft
, 5 feet is the max for most canal systems, and a more yacht trawler
like hull shape with its large accommodations, especially in the aft cabin
. But the neatest thing of all is the way the large motor and large sailing rig of a true motorsailer, designed with a nice slippery hull, work in harmony, the motor taking over in the lulls and the rig taking over in the puffs, to provide a surprisingly fast, fuel
efficient and comfortable passage