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Old 11-12-2010, 08:12 PM   #10
koliver
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City: Saltspring Island
Country: BC, canada
Vessel Name: Retreat
Vessel Model: C&L 44
Join Date: Nov 2007
Posts: 2,422
RE: Narrowing the search

Fuel burn will be a function of the weight of the boat, the speed you want to go, and most important, the size of the wave you try to pull along with you. The engines will affect this a little, but not a lot. So if your 40 weighs 30,000 lb and you want to go 7.5 knots, your 43 weighs 30,000 lb and you go 7.5 knots and your 44 weighs 30,000 lb and you want to go 7.5 knots, your fuel burn will be the same.
Push your speed up a knot, and you will be pulling a bigger wave with the 40, as you will be exceeding its hull speed, so you will suffer worse fuel economy that on the other 2.
Other considerations, you will have to judge how much work for the savings.
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