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Old 01-04-2018, 05:52 AM   #21
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Vessel Model: Nordic Tug 37
Join Date: Sep 2015
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I figured out where the broker taught me this sentence 1/2 gal ... It comes from the Nordic tug company presentation when the first model NT 26 was launched for the first time on the market.

NT pages:

"With the nostalgic appeal and notable fuel economy (1/2 gallon per hour at 6-1/2 knots), Nordic Tugs became an immediate success. "

That is, consumption was the first NT 26 models in the 80s!

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Old 01-04-2018, 06:26 AM   #22
City: Carefree, Arizona
Vessel Name: sunchaser V
Vessel Model: DeFever 48 (sold)
Join Date: Apr 2008
Posts: 10,026
Of course it's true. Tis the Internet age. In the old days we could glean all sorts of tidbits by perusing JC Whitney catalogs.
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Old 01-04-2018, 09:15 AM   #23
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City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
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Originally Posted by AKDoug View Post
Too bad you don't believe it, but for me that's averaged over 263 hours of run time. And yes, it IS 13 mpg. And for me that's 5.5 knots at .42, at 7 knots my fuel consumption more than doubles to 1 gph.

I have no trouble believing a longer waterline would get those results.
You have a more efficient displacement hull shape than the 32NT, and as you said 1knot can double fuel consumption. The Cummins also isn't going to be efficient producing less than 10 HP at the prop running at 1,000 RPM.


Originally Posted by North Baltic sea View Post
For example, 6,2kn fuel Burn 0,89gal / hour - 7nm / gal

Here's the whole speed / consumption measurement as a table consumption per liter / hour

Attachment 71784

I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
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Old 01-04-2018, 09:41 AM   #24
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City: Maine Coast
Vessel Name: Tortuga
Vessel Model: Nunes Brothers Raised Deck Cruiser
Join Date: Feb 2015
Posts: 889
1/2 gal per hour at 6.5 knots is not real for a Nordic 32 at 6.5 knots. My 32'8" boat which displaces about 9,500 lbs and has a full displacement hull burns about 0.6 gph at 6.5 knots. There is simple no way a similar length boat with 50% more displacement will use less fuel. By the way my fuel burn at 5.5 knots is about 0.35 gph or 16 mpg. If I slow to 5 knots I am around a quart an hour or 20 mpg. Those numbers are for flat water only.
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Old 01-04-2018, 11:17 AM   #25
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City: Powell River, BC
Vessel Name: Northern Spy
Vessel Model: Nordic Tug 26
Join Date: Feb 2012
Posts: 4,054
My Nordic Tug 26 used to be around 2 liters per hour at 6 knots when it had a 42hp BMW diesel. Now it is closer to 3 liters per hour at 6.5 knots with a 75hp Volvo.

But I normally run 7.5-8 kts burning 5 liters per hour.
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