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Old 03-21-2015, 09:41 PM   #1
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hey, "sip" this...

I was doing some research on the Great Loop this evening, and happened to come across an article with this sentence:

"Under the water is a slippery hull that a single, fuel-sipping 425-hp Cummins diesel drives to a comfortable 16-knot cruising speed (and 20.4 knots flat out)."

I think it is the first time I have seen the phrases "425 hp", "16-knot", and "fuel sipping" all used in the same sentence.
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Old 03-22-2015, 02:23 AM   #2
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Originally Posted by seattleboatguy View Post
I was doing some research on the Great Loop this evening, and happened to come across an article with this sentence:

"Under the water is a slippery hull that a single, fuel-sipping 425-hp Cummins diesel drives to a comfortable 16-knot cruising speed (and 20.4 knots flat out)."

I think it is the first time I have seen the phrases "425 hp", "16-knot", and "fuel sipping" all used in the same sentence.
Well, what's the sipage number?
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Old 03-22-2015, 04:28 AM   #3
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16k, 15.8 gph
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Old 03-22-2015, 09:44 AM   #4
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16k, 15.8 gph
More like borderline chugging to me. Now half that number would be sipping.
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Old 03-22-2015, 10:36 AM   #5
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My DD 6-71 450HP will drink 16GPH at 19Knts. So me thinks this Cummins is a bit of a gulper.

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Old 03-22-2015, 10:44 AM   #6
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Reminds me of a buddy that insisted that his 61 viking with twin 2400HP Mtu's wasn't that un fuel efficient. He said at the speed he likes he only burns 100GPH per side. I prefer my modest 5GPH
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Old 03-22-2015, 12:47 PM   #7
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If you have more than a 3/8" fuel line, you ain't sippin.

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Old 03-22-2015, 01:30 PM   #8
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I guess it is all relative; but when I hear about "sipping fuel", < 2-3 gph comes to mind. Amazing people can afford to operate boats with large diesel guzzling engines.

I love my 1/2 gph burn rate and 200+ nm range on slightly less than 20 gallons. I can spend more going to the movies with my family than a day trip on my boat. I've learned to enjoy the trip more than the destination.
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Old 03-22-2015, 02:32 PM   #9
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There's a huge difference between a baby's sip and an elephant's sip! I prefer the baby sip.
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Old 03-22-2015, 03:21 PM   #10
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It's all a matter of perspective. To us, that is definitely sipping. We're use to two to three times that fuel usage at that speed.
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Old 03-22-2015, 03:45 PM   #11
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Originally Posted by O C Diver View Post
If you have more than a 3/8" fuel line, you ain't sippin.

Ted

Now that says it all! I never thought of that quick and easy reference, the fuel line!
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Old 03-22-2015, 04:49 PM   #12
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As I approached retirement, I was cruising along at altitude in the Learjet 60 doing 480 knots. I commented to my copilot that we're now cruising at 8 miles per minute and soon I'll be enjoying 8 miles per hour. He asked, "Well, is that boat 60 times more efficient?"

"Good question!!" So I pulled out my calculator and ran the numbers. They came out something like this...

Learjet 60: 200 GPH @ 480 Kts=2.4 NM/Gal

Californian 34 LRC: 3.1 GPH at 7.5 Kts = 2.4 NM/Gal

It was hard to believe that the largest Learjet had the same fuel efficiency as my slow trawler! I explained that I also get to enjoy my boat 24 hrs a day, even if the engines are not running. In the Learjet, we never enjoyed our time aboard when the engines were not running!!

So I guess it's all relative, but sometimes the time saved or the weather avoided by a fast run is worth every extra penny spent on the fuel. It's nice to have options, something my current boat does not afford me.
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Old 03-22-2015, 06:22 PM   #13
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Learjet 60: 200 GPH @ 480 Kts=2.4 NM/Gal

Californian 34 LRC: 3.1 GPH at 7.5 Kts = 2.4 NM/Gal

Now how about comparisons on purchase price, nav equipment, maintenance costs and the like?
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Old 03-22-2015, 06:27 PM   #14
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Now how about comparisons on purchase price, nav equipment, maintenance costs and the like?
Not to mention the cost of jet fuel versus diesel. Oddly, it is less for jet fuel vice low sulfur diesel.
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Old 03-22-2015, 08:33 PM   #15
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Fly-what kind of anchor do you put on a Lear?
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Old 03-22-2015, 09:33 PM   #16
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hey, &quot;sip&quot; this...

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Fly-what kind of anchor do you put on a Lear?

Wheel chocks
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Old 03-22-2015, 10:43 PM   #17
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Wheel chocks
That's it....or a hangar! In nice weather, we'd chock it. If in doubt, it got hangared. Never once remember tying it down like lighter aircraft. Come to think of it, I don't think it's got tiedown rings.

Some places would provide a hanger for $50-75 for the night. Other places would gouge us for up to $500 for a heated hangar in the winter! Ouch...I hated paying that!!
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Old 03-23-2015, 09:33 AM   #18
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Quote:
Originally Posted by seattleboatguy View Post
I was doing some research on the Great Loop this evening, and happened to come across an article with this sentence:

"Under the water is a slippery hull that a single, fuel-sipping 425-hp Cummins diesel drives to a comfortable 16-knot cruising speed (and 20.4 knots flat out)."

I think it is the first time I have seen the phrases "425 hp", "16-knot", and "fuel sipping" all used in the same sentence.
For most if not all of us North and South American MV owners the annual volume of fuel burned represents a small % of boat ownership costs. Let us cheer on the 15 or more GPH users knowing they are the ones keeping the marinas, boat repair places, builder's yards and marine development business going. Those of us burning less than 5 GPH cannot sustain the marine industry as we know it.

Sure, sipping fuel is good for bragging rights, but only for a very small group of us. Today's engines and hull designs allow one to sip fuel on a SD 45 - 55 footer or blast it out to a comfortable 16 knot cruise. Sounds good to me, Tony Fleming, Nordhavn, Doug Zurn, Tad Roberts, Sam Devlin and a large group of other MV builders and NAs.
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Old 03-23-2015, 10:52 AM   #19
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For most if not all of us North and South American MV owners the annual volume of fuel burned represents a small % of boat ownership costs........Today's engines and hull designs allow one to sip fuel on a SD 45 - 55 footer or blast it out to a comfortable 16 knot cruise.
(I'm getting tired of defending my Yanmar 440s.)
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Old 03-23-2015, 11:21 AM   #20
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Originally Posted by N4712 View Post
Reminds me of a buddy that insisted that his 61 viking with twin 2400HP Mtu's wasn't that un fuel efficient. He said at the speed he likes he only burns 100GPH per side. I prefer my modest 5GPH
I was going to use the same reference. A buddy had a 68 foot viking with the same engines. 180gph at about 38kts.

It's all relative!!!!
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