Slower than what? Planing hulls going slower than planing speed are much
less efficient.

Actually, i am not so sure about that, I have a 44 marine trader with twin 270
hp lemans, I cruise at 9 mph (knots are for sailors with lots of time on their
hands) and average 1mpg., as do most of the reports I see from the great loop.
Whats better??

"Florida Keyz" wrote in message
...
Slower than what? Planing hulls going slower than planing speed are much
less efficient.

Actually, i am not so sure about that, I have a 44 marine trader with twin
270
hp lemans, I cruise at 9 mph (knots are for sailors with lots of time on
their
hands) and average 1mpg., as do most of the reports I see from the great
loop.
Whats better??

In my quick and dirty testing of my new flow meter this weekend - about 50
miles total in a variety of lake and river conditions - the sweet spot that
maximizes miles per gallon definitely is at planing speed. I'm not sure
exactly where yet, but it didn't even appear to be at slowest planing speed,
but more testing is needed!

The bad news is that I'm not going to get more than 2 mpg and often a little
less, it seems.

Cam

Slower than what? Planing hulls going slower than planing speed are much
less efficient.

Actually, i am not so sure about that, I have a 44 marine trader with twin
270
hp lemans, I cruise at 9 mph (knots are for sailors with lots of time on
their

Your 44 Marine Trader is not a planing hull.

It's a semi-displacement trawler.

At what rpm do you make 8 kt? (about 9 mph)

Experiment with slowing down to 7 kt, and you might realize a 25-30 percent
increase in fuel economy. I have experienced that kind of results in the past,
in a smaller hull with similar characteristics.

Caveat: Running a diesel engine too slowly for an extended period of time is
not generally recommended. As you know, they thrive on exercise.

"Florida Keyz" wrote in message
...
Slower than what? Planing hulls going slower than planing speed are much
less efficient.

Actually, i am not so sure about that, I have a 44 marine trader

A Marine Trader is not a "planing hull".