Originally Posted by scoobert
i realize that, but what about when your going very slow?
In my experience a planing hull running at displacement speed gets about the same mileage as a displacement hull of comparable weight. There is probably some difference, but it's not huge. Ive traveled on and off with displacement trawlers (mine is planing) and we compared mileage along the way. The differences in our mileage were all attributable to the weight differences in our boats.
And at least technically it is incorrect that a displacement boat is most efficient at displacement speed. Efficiency for a boat is measured in miles per gallon just like for a car. As you increase speed from zero to hull speed
, a boat's mileage drops steadily along the way. Boaters' obsession the GPH blinds them to this.
When someone says their boat has a sweet spot at xyz, what i think they really mean is that that speed represents their preferred tradeoff between economy and speed.
Ok, let the flaming begin.......