Cruising Speed

D

doke01

Well-known member
Joined
Dec 19, 2008
Messages
579
Fluid Motion Model
C-248 C
Hull Identification Number
FMLT2507I607
Vessel Name
Nauti Dream (2007)
I haven't seen anything about the cruising/top speed and fuel consumption yet for the Cutwaters. Does anyone know them?
 
Yes, the C26 with Yanmar 180 at 14 knots is burning about 4.6 gallons per hour, top speed 21-22 knots. The C28 with Yanmar 260 is 16 knots and burning 5.5 to 6 gallons per hour. Runs nice at 19-21 knots, top speed or WOT is 26-27 knots. Mark
 
The majority of the time we wouldn't expect to be running all that fast. Do you have any fuel consumption data for "trawling speeds" It might help a prospective buyer decide?
 
This should be interesting to watch...
IMO the Cutwater is a go fast dressed up to resemble a tug (actually I like the boat)...
It will attract a crowd that considers 14 to be slow......
Then there are the penurious like me, who consider cruising at 6 (1.0 gph) to be the wild abandon of a profligate wastrel

I had the same thought as I looked at the cutwater in the hull that it will not be as efficient at 6 to 8 (I'm 'assuming' )... However, I suspect that the hit on low speed efficiency will be minor - like an extra tenth of a gallon at 6 for the hull design and another tenth of a gallon for running a large displacement engine at slow speed...

I await with great interest the low speed 😱 fuel flow numbers from owners...
 
Levitation":3ubytyie said:
profligate wastrel
Click to expand...

From the "Department of Redundancy Department".

Sorry Denny, but you forced me to the dictionary 3 times with that post and I couldn't resist myself.

I too am curious about the Cutwater fuel consumption rates at displacement speeds. Don't think it will sway me from sticking with the Ranger Tug line of boats however. My wife and I love to go low and slow..... now don't over think that statement. 😉 :shock:

Eric
 
Putt, putt, putt, puttt (whoops), putt, putt, putt...
 
Jerry,

At least I am not the only one on this site with a whacky sense of humor. Thanks for that, I laughed heartily. :lol:

Eric
 
If you look at the Reed Yacht Sales homepage they have a listing of fuel consumption at various speeds for the Cutwater 26 & 28. Hopefully this will answer all your questions. Reed is the Midwest dealer for Cutwater with 2 locations in Michigan.
 
How about either of these boats in salt water. The southern inter costal waterways and Atlantic? What is the best travel/ cruising speed that is economical?
 
jgjhhi":9sxyd8ta said:
How about either of these boats in salt water. The southern inter costal waterways and Atlantic? What is the best travel/ cruising speed that is economical?
Click to expand...

Salt water has little effect on performance compared to fresh. 😛
Here are the charts so you can see for yourself:

289hd8g.jpg


9ao3kg.jpg


I can vouch that the C28 chart is pretty accurate.
 
CutwaterMark":ml23hqzw said:
Yes, the C26 with Yanmar 180 at 14 knots is burning about 4.6 gallons per hour, top speed 21-22 knots. The C28 with Yanmar 260 is 16 knots and burning 5.5 to 6 gallons per hour. Runs nice at 19-21 knots, top speed or WOT is 26-27 knots. Mark
Click to expand...

FYI...
My 2010 R25 with 4BY2-150 engine fully loaded with 65 gal of fuel, lots of onboard gear, 4 adults and two children and with 200 lbs on the swim step burns 5.5 to 6.0 gals/hour at 15 kts (3800 RPM) in calm seas and zero wind & current. Same boat and sea conditions at 7 kts is around 1.2 gals/hour
 
I see they had the boat half full of fuel and full tank of water (and don't specify what "full gear" constitutes). And the other more important question is are these Cutwater numbers achieved traveling with the current, or against the current, or across the current (and in all three how strong was the current), or during slack time, or on a fresh water lake where there is negligible current?

Gene R
Wolf Pack
 
Wolf Pack":39nix1mu said:
I see they had the boat half full of fuel and full tank of water (and don't specify what "full gear" constitutes). And the other more important question is are these Cutwater numbers achieved traveling with the current, or against the current, or across the current (and in all three how strong was the current), or during slack time, or on a fresh water lake where there is negligible current?

Gene R
Wolf Pack
Click to expand...

I guess we'd also need to know the exact angle if going across current, as well as wind strength and direction, wave height, direction and shape, the weight of the two people on board, position of the trim tabs, and probably how much was in the holding tank. 😉

As the exact test conditions are never likely to be encountered by another boat, and no two engines will provide exactly the same output, it makes sense to regard the figures as a rough approximation of the performance that could be expected.

I can tell you from personal experience though that those figures are a reasonable ballpark.
On flat, but not smooth water, in the Gulf we can hold a steady 26+knts WOT on a full tank; when it drops to half that, i.e 50 gal, we can run at 29+kts WOT (no appreciable current or wind).

Not that we drive the boat like that all the time though. Fast can be fun, but so too can be slowly meandering along a river for hours. 🙂
 
All potential Cutwater owners! Beware of the knots you are talking about!
This is what can happen at such "Ludicrous Speed:"
ludicrous+speed.jpg

"No, no, no light speed is too slow! We're gonna have to go
right to. . .Ludicrous Speed! (Dark Helmet, Spaceballs)

Dark Helmet was chasing Lone Star and Barf (the Wookiee) in their Winnebago spaceship. You may recall that Lone Star was sent to rescue Princess Vespa (on the day of her pre-arranged wedding to the narcoleptic Prince Valium), but she had already split in her personal mercedes spaceship. Still Lone Star went to her rescue. Even ludicrous speed was not enough for Dark Helmet to catch Lone Star and Barf in their interstellar Winnebago (think tugboat). See the terrible results of going at these speeds for yourself, below:
[youtube]http://www.youtube.com/watch?v=ZFqbAGqKTsE[/youtube]

There was more pressure on Lone Star, from the money lenders, of course!
Hear it yourself from Pizza the Hutt:
[youtube]http://www.youtube.com/watch?v=r_CDCrsO604[/youtube]

Sub-ludicrous speed (tugboat or Winnebago) seems adequate and safe. Avoid the Cutwater over-speed risks! Yes, yes I know. I have too much time...
 
doke01":72ae9jkf said:
I haven't seen anything about the cruising/top speed and fuel consumption yet for the Cutwaters. Does anyone know them?
Click to expand...



I am also looking for information on top cruising speed with the 200 Penta Volvo.... We have had our Cutwater 26 a week now and went out in choppy seas, but no swell. 4 adults (average) full water, full fuel. Not much else and couldn't do much better than 13 knots @ 3400rpm.....
....???.? :?
 
We have the list of the cruising speeds but haven't found that it is accurate yet. We took the Cutwater26 out again this weekend (3rd time out) and the weather was a bit better. We haven't calculated a good fuel consumption, the fuel guage is not specific enough to know what we used so will have to wait until we refuel. Nice that we haven't had to do that yet. 😉
This time we reached 20knots.....at about 4000rpm but we are concerned about running at top speed for long periods....like going to the island, 25 miles away...which we do regularly. We haven't gone with this new boat yet.
We were told to find a happy 85% sweet spot somewhere....hmmmm we are not there yet. We are still shaking down the boat.
There are minor problems. The hose clamp on the fresh water hose at the pump was never tightened so it flew off when pressure hit it and filled the bilge with a full tank of fresh water. The galley table won't come up, several hatches are not fit properly and hinges are loose...one has a broken bolt. The shower sump pump won't quit running so we had to remove the fuse. The dealer is planning to take care of all the issues, no problem. I consider them minor...and usually comes with a new boat.
Is there anyone out there with a Cutwater26? I love the tugs....but the Cutwater was a better fit for us. Both boats are great.
 
Sirensmyst, If you ever notice, the reviews about a boat's speed, they always mention how much fuel, water and passengers the boat has along with the RPM, temperature, sea state, wind speed and direction, going up hill/down hill, etc. etc. etc. One thing I have learned is the performance of my boat changes every time I take it out and the performance is always dependent upon conditions, conditions, conditions. The manual for my Yanmar engine leads me to believe performance is based on RPM and not speed. The manual also states what the RPM should be for all conditions, including slow cruise, fast cruise, engine break in, etc. Have you read the engine manual yet? It has a lot of useful information. BTW, my manual says I should only run my engine at max RPM for no more than 5 minutes per hour to clean out the engine.
 
Andrew Custis":17rradgs said:
Here is the latest Cutwater report with pretty accurate numbers by GPS. Keep in mind these boats have no bottom paint and light loads. This was with the Volvo 200.

https://skydrive.live.com/redir?resid=C ... wHr0Wz5y6Y
Click to expand...

How much of a hit on average, as a percent are you seeing with bottom paint?

Taking the current present during the test into account those numbers are very similar to those published earlier for the 4BY2 powered C26s.

Do you have better numbers for the C28 also?
 
We don't have the Yanmar....and we have read the lislings....and we are aware of the conditions....this is our 5th boat.
I didn't find anywhere about the 5 min run time at max....but it sounds reasonable.
The reviews you mention....is that the list posted prior? We have that. If there is something else, I'd like to know where to look. We haven't finished going through the manual....I was just wondering if others with the boat had ideas, the semi-displacement hull is different for us. I am used to a displacement when I was commercial fishing....then we got a Robalo...that felt like a cork in the water to me. I never got used to it.....
It sounds like we are doing what we are supposed to be doing. The variables are much wider with this boat. It is affected more.
Thanks for the response.....we are learning as we go....any information is good info....and we appreciate it.
Cutwater26
California
 
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