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Old 01-04-2018, 05:52 AM   #21
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Hi,


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!

NBs
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Old 01-04-2018, 06:26 AM   #22
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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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Quote:
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.

Ted

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Originally Posted by North Baltic sea View Post
Hi,
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

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Old 01-04-2018, 09:41 AM   #24
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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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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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