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Old 01-03-2018, 02:03 PM   #1
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Could this ad be correct !?!?!

This is from an ad currently on Yachtworld.....

"The most popular boat of her type ever built, the Nordic 32 is a full keeled, semi displacement cruiser whose classic tugboat profile and quality construction have endeared her to yachting enthusiasts for many years. The 32 is an unquestionably eye catching design. The Nordic 32 has a cruising speed of 12 knots and is very economical to operate with its single Cummins diesel. 1/2 a gallon per hour at 6 1/2 knots. A very easy boat to maneuver as well with a side power bow thruster. The Nordic 32 is USA built and this one has had only two owners that have kept very detailed records and logs. New bottom paint (Summer 2016)" ( bolding was mine )

Can an NT 32 really get 13 miles per gallon ???

1999 Nordic Tugs 32 Power Boat For Sale - www.yachtworld.com
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Old 01-03-2018, 02:11 PM   #2
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Could be very possible at only 6 1/2 knots.
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Old 01-03-2018, 03:01 PM   #3
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I don't think so. I bet that engine burns at least that much at idle. I am guessing 2 gph to push that boat to 6.5 Kts.

Never, ever accept anyone's word for fuel consumption without records and data to back it up.

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Old 01-03-2018, 03:06 PM   #4
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I had a 34’ sailboat with 25hp Yanmar that burned 2/3 gallon at 6.5kts and 1/2 gallon at 5.9kts. Looks like this claim has a bit of current assist.
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Old 01-03-2018, 03:06 PM   #5
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1/2 gallon per hour is enough to produce 10hp. I am not familiar with the boat, but I would be really surprised if a 32' boat that is any more substantial than a canoe could get 6.5 knots from 10 hp.
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Old 01-03-2018, 03:19 PM   #6
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Thanks guys.
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Old 01-03-2018, 03:37 PM   #7
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Wow, a broker exaggerating in an ad. What will happen next.
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Old 01-03-2018, 03:59 PM   #8
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It might be a typo. I can easily see this happening if someone meant (1 - 1/2) or more likely (1-2).
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Old 01-03-2018, 04:39 PM   #9
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I have the same boat with the same engine. I can attest that this is a very efficient combination, but the broker listing may be a slight exaggeration though.

In Dec, I traveled 302nm in 50hrs at the helm. All but 80 of those miles were at 4-6kts. Those 80 miles were at WOT....14kts. I used 115 gallons of fuel. I know WOT on this engine is about 12gph. That leaves the remainder of my time averaging close to 1gph.
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Old 01-03-2018, 05:04 PM   #10
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It might be a typo. I can easily see this happening if someone meant (1 - 1/2) or more likely (1-2).
Typo is what I would guess from my friend's NT32 experience. I could believe 1.5 gal/hr at 6.5 knots.

Our NT37 averaged 3.83 nmpg last summer over 4,400 nm. Mostly at 7-7.5 knots, and some faster. A little less than 2 gal/hr.
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Old 01-03-2018, 05:07 PM   #11
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I will buy 1gph at 4 to 5 knots...start pushing 6 and I will bet it jumps quite a bit.
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Old 01-03-2018, 05:24 PM   #12
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My Albin-25 powered by a Volvo-Penta MD17C burns 1/2gal/hr at 6.5 kts, if I shade the truth just a wee bit, and these boats are considered very economical.
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Old 01-03-2018, 05:25 PM   #13
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I have a friend who had the 220hp Cummins in his 32NT, it pretty much did 6 knots at idle with a burn of 1 gph. It idled too fast to troll for salmon, and 1 gph was his minimum fuel burn. The newer 32NT's have even larger engines, though I would be willing to bet a 32 with a very small engine would get better economy.

I towed his NT in with my Willard when he got an air leak in a fuel line. At my 1 gph rpm I made 5 1/2 knots towing him, that would usually push me at 7 knots. I believe a smaller engine would achieve pretty close to what is claimed, but not a Cummins...

My 5 1/2 knots rpm is .42 gph...
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Old 01-03-2018, 06:55 PM   #14
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At 6.5 knots, I'd bet on 1.5 to 1.75 gpm.
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Old 01-03-2018, 07:03 PM   #15
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wow, a broker exaggerating in an ad. What will happen next.
lol
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Old 01-03-2018, 07:11 PM   #16
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hey, my friends 42 foot sailboat goes 7 knots at less than a gallon an hour.....

BFD..... compare hull types and waterline lengths and it isnt too hard to see what is what. Obviously there are certain more efficient hull shapes.

Heck, I was fortunate enough to have enough experience to NOT believe a word the PO said about the boat I bought and how fast and efficient he said it was. NOT!
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Old 01-03-2018, 09:18 PM   #17
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6.5 knots at .5 GPH is 13 MPG. Sorry thats not happening. I might believe 6 to7 MPG at 6.5 knots.

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Old 01-03-2018, 10:15 PM   #18
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6.5 knots at .5 GPH is 13 MPG. Sorry thats not happening. I might believe 6 to7 MPG at 6.5 knots.

Ted
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.
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Old 01-04-2018, 12:19 AM   #19
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Quote:
Originally Posted by Benthic2 View Post
This is from an ad currently on Yachtworld.....

"The most popular boat of her type ever built, the Nordic 32 is a full keeled, semi displacement cruiser whose classic tugboat profile and quality construction have endeared her to yachting enthusiasts for many years. The 32 is an unquestionably eye catching design. The Nordic 32 has a cruising speed of 12 knots and is very economical to operate with its single Cummins diesel. 1/2 a gallon per hour at 6 1/2 knots. A very easy boat to maneuver as well with a side power bow thruster. The Nordic 32 is USA built and this one has had only two owners that have kept very detailed records and logs. New bottom paint (Summer 2016)" ( bolding was mine )

Can an NT 32 really get 13 miles per gallon ???

1999 Nordic Tugs 32 Power Boat For Sale - www.yachtworld.com
Hi,

I have NT 37 And here's my measured consumption, reads Vesel viev and gps. Water, fuel 100% full, 5 people and full equipment LLC, food, clothing, spare parts etc.

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


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NBs
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Old 01-04-2018, 12:53 AM   #20
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The N32 listing indicates Cummins 6BTA 220 power. According to the factory performance curve, the fuel consumption at 800 rpm is 1.3 gal/hr on the propeller curve. The idle speed range for this engine is 700-900 rpm. At idle in gear, I can't imagine how the minimum fuel consumption could be any less than that.
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