Closed Thread
 
Thread Tools Display Modes
 
Old 07-30-2012, 08:14 PM   #21
Scraping Paint
 
City: -
Country: -
Join Date: Oct 2007
Posts: 13,748
The original, so-called "trawler" concept was for a boat that by its very nature is economical to operate. Whether it has a displacent hull or a semi-planing hull, the boats were intended for relatively slow, fuel-minimizing cruising. A semi-planing hull like a Grand Banks, CHB, etc has some inerhent characteristics that some people view as desirable even at slow speeds like 8 knots or so. The fact these hulls can be driven much faster with the application of a lot more power is also a benefit to some buyers but it doesn't mean the boat has to be operated that way.

But displacement or semi-planing, the true diesel cruiser concept is a very economical boat--- be it a single-engine, displacement Willard or a twin engine semi-planing GB--- when compared to boats that are intended to be run at higher speeds like the big Bayliners, Sea Rays, Eastbays, etc.

So if it was me and I was considering the acquisiton of a boat to spend a lot of time cruising in, be it coastal or inland or a combination of the two, I would be more focused on things like accomodations, configuration, equipment, and what it would be like to operate and maneuver and relax and eat and sleep on board--- things that have a much greater affect on my interaction with the boat than fuel economy.

While the difference of a mile or fraction thereof per gallon can indeed add up over time, given the other expenses associated with cruising the fuel cost differences between the typical, economical diesel cruisers on the market isn't going to be all that signficant to my way of thinking.

I have no idea what our fuel burn is. I know it's "about" five gallons an hour as that's what GB36s with a pair of FL1120s tend to get. We carry 400 gallons of fuel in five tanks with sight gauges so we are well aware of how much we have on board at any given time.

So as long as we determine we have enough on board to do what we want to do, that's as far as our fuel thinking goes. We're not going to back off a few hundred rpm and run at 6 knots to save a few gallons because running at 6 knots in the currents around here can be the equivelent of staying home.

If the differences between 2.2567491 nmpg and 3.1849073 nmpg was that significant, we wouldn't have taken up boating in the first place.
__________________
Advertisement

Marin is offline  
Old 07-30-2012, 09:11 PM   #22
Guru
 
Carey's Avatar
 
City: Bellingham, WA
Country: USA
Vessel Name: Happy Destiny
Vessel Model: Custom Lobster Yacht
Join Date: Oct 2007
Posts: 1,101
Quote:
Originally Posted by Steve View Post
On our 2003 Monk 36,with a 22hp Cummins we are getting about 2.4 NM per gallon cruising @ 7k
Older models with smaller engines will get higher
Steve W.
Steve
Did you mean 2.4 gph?
__________________

__________________
Carey Worthen
Master of Disaster
Carey is offline  
Old 07-30-2012, 11:12 PM   #23
Master and Commander
 
markpierce's Avatar
 
City: Vallejo CA
Country: USA
Vessel Name: Carquinez Coot
Vessel Model: 2011 Seahorse Marine Coot hull #6
Join Date: Sep 2010
Posts: 10,262
Quote:
Originally Posted by manyboats View Post
Sue,
A sailboat would do it.
"Manyanchors," don't give her the idea!
__________________
Kar-KEEN-ez Koot
markpierce is offline  
Old 12-30-2012, 02:49 PM   #24
Newbie
 
City: naples,fl
Country: us
Join Date: Dec 2012
Posts: 3
Sue
I had a 390 1997 mainship that I lost to Sandy, that said she had a 300 hp cat that at 1200 rpm would give us 6.5 k and use approx 1 to 11/2 gal per hour. She was a great boat that I brought in fl and kept in ny, my travel took me up the hudson to canada and up to R I and boston area. it was a great boat for along the coast
stepheniser is offline  
Old 12-30-2012, 06:33 PM   #25
Guru
 
Daddyo's Avatar


 
City: Cruising East Coast US
Country: USA
Vessel Name: Grace
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 2,441
Clay's DeFever 38 listed in the classified would be a perfect fit.
__________________
Mark Bowerman
Brokerage owner and cruiser
Esse Quam Videri
http://graceyachting.com/
Daddyo is offline  
Old 12-30-2012, 07:09 PM   #26
Guru
 
Nomad Willy's Avatar
 
City: Concrete Washington State
Country: USA
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 13,710
Sue bought a boat.

But I spent a few minutes on Yacht World to get some ideas for her and in case others are looking for a regular trawler with low fuel burn high on their agenda I'll pass on my observations.

Full disp is of course always best for fuel efficiency but there are just not enough to specifically look for them.

My pics are;

1 Sundowner Tugs
2 Nordic Tug 32
3 Gulfstar 36
4 CHB 34
5 Cape Dory
6 Monterey Clipper.

There are quite a few Gulfstars at good prices. I saw an interesting GB. A 32 w/o the FB and w Cummins power.
Sometimes it's fun to browse YW
__________________
Eric

North Western Washington State USA
Nomad Willy is online now  
Old 01-02-2015, 04:42 PM   #27
Newbie
 
City: mountainville
Country: usa
Join Date: Jan 2015
Posts: 1
Quote:
Originally Posted by Chrisjs View Post
Sue:
Many (displacement) single screw trawlers will achieve better than 2nmpg, especially when you are traveling slow in canals etc on the Gt. Loop route. For example we have a 65,000 lb 50ft trawler with a 280HP engine that does about 3nmpg at 7.5kt.
I would focus on all the other factors that are important to you. Also, my experience is that fuel does not actually end up being such a major component of ownership/cruising costs
what type of trawler do you have?
sgoren is offline  
Old 01-02-2015, 04:49 PM   #28
Guru
 
Join Date: Oct 2007
Posts: 734
Hi Sgoren:
No longer have the vessel. New owners are pretty happy with her, though!!
The trawler is a Selene 47 with 280HP Cummins. Average fuel consumption over many trips was about 2.5gpm at about 7.5kt, equates to 3nmpg.
Chrisjs
Chrisjs is offline  
Old 01-02-2015, 08:33 PM   #29
Guru
 
Nomad Willy's Avatar
 
City: Concrete Washington State
Country: USA
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 13,710
To narrow my pics in post #26 ....

1. Gulfstar
2. CHB 34
3. Nordic Tug

I don't think the Cape Dory or Monterey Clipper is available enough to list and the Sundowner has basically a planing hull w a keel attached. Too far from FD. I think they are lighter than most similar boats and from an efficiency point that redeems them to some extent.

Of course FD is best but some FD boats are so heavy that some SD boats will match then for efficiency. For efficiency weight is a very big enemy and trawlers are traditionally heavy. And very few owners are thinking in terms of keeping thier boats light as evidenced by so many insisting on all chain anchor rodes. So it goes something like this ..
WEIGHT,
BEAM and
HULL DESIGN.
But specific boats may re-arrange the list.
__________________
Eric

North Western Washington State USA
Nomad Willy is online now  
Old 01-02-2015, 10:39 PM   #30
Guru
 
Mule's Avatar
 
City: Fort Pierce
Country: USA
Vessel Name: Florita Ann
Vessel Model: 1982 Present
Join Date: May 2014
Posts: 1,784
What about Hatteras LRC?
Mule is offline  
Old 01-03-2015, 05:49 PM   #31
Guru
 
Join Date: Apr 2014
Posts: 1,291
Sue please take my advise don't get hung up on the fuel thing. Unless the boat you pick is very big and a pig on fuel its not an issue. Concentrate more on the boat itself. Things like livability and how it will ride. For the loop and inland waters how it deals with wake. How comfortable does it sit at anchor etc. etc........
eyschulman is offline  
Old 01-03-2015, 06:32 PM   #32
Guru
 
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 6,363
Uh, 2 1/2 year old post. She should have completed the loop by now. Wonder how it went.
sunchaser is offline  
Old 01-03-2015, 06:38 PM   #33
Guru
 
Join Date: Apr 2014
Posts: 1,291
Sorry saw the dates on the last couple of posts. Still good advise to those contemplating a new for them boat.
eyschulman is offline  
Old 01-03-2015, 06:38 PM   #34
Veteran Member
 
City: Bayfield, WI
Country: USA
Join Date: Jan 2013
Posts: 92
There is no way you are going to go to the headwaters of the Mississippi and do the "Loop" backwards. About as far north as you can go is St. Anthony Falls in Minneapolis and then it is all down river from there. Just a little geography note.
I forgot to mention that the "headwaters" of the Mississippi is actually at Itaska State Park at least a couple of hours north of the Twin Cities.
Barpilot is offline  
Old 01-03-2015, 10:54 PM   #35
Guru
 
SCOTTEDAVIS's Avatar
 
City: Vero Beach, FL.
Country: US
Vessel Name: FIREFLY
Vessel Model: Pilgrim 40
Join Date: Nov 2012
Posts: 913
120 HP. cruse a 7 MPH (AICW) 1.4 gph at 1550 RPM.= 5 mpg

So there!
SCOTTEDAVIS is offline  
Old 01-04-2015, 09:35 AM   #36
Guru
 
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 6,363
Quote:
Originally Posted by Barpilot View Post
There is no way you are going to go to the headwaters of the Mississippi and do the "Loop" backwards. About as far north as you can go is St. Anthony Falls in Minneapolis and then it is all down river from there. Just a little geography note.
I forgot to mention that the "headwaters" of the Mississippi is actually at Itaska State Park at least a couple of hours north of the Twin Cities.
Going up the Mississippi is quite fun . I especially like the Iowa stops. Just follow the barges and you won't get lost.
sunchaser is offline  
Old 01-04-2015, 10:55 AM   #37
Guru
 
Nomad Willy's Avatar
 
City: Concrete Washington State
Country: USA
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 13,710
Quote:
Originally Posted by SCOTTEDAVIS View Post
120 HP. cruse a 7 MPH (AICW) 1.4 gph at 1550 RPM.= 5 mpg

So there!
Looks like you've got 60hp too much. With a hull as slick as yours 50hp total and 30 for cruise should cover your bases.
But like they used to say in old time drag racing "run what ya brung".
__________________
Eric

North Western Washington State USA
Nomad Willy is online now  
Old 01-04-2015, 12:24 PM   #38
Guru
 
City: gulf coast
Country: pinellas
Join Date: Jun 2014
Posts: 2,199
Quote:
Originally Posted by Sue Freeman View Post
I'm shopping for a trawler to do the Great Loop. I know I want a single screw diesel in the 32 to 36' range. Fuel economy is very important to me. I know there are a boat-load of variables involved, but can anyone recommend a boat make & model and engine combination is is likely to cruise at trawler speed for less than 2 miles per gallon of diesel fuel?

I assume that you mean better than 2 NMpg. Most boats below 50' or so will qualify if you keep them to six knots.\

The big question is why not use the boat you now own?
bayview is offline  
Old 01-04-2015, 12:38 PM   #39
Guru
 
City: Hotel, CA
Country: Fried
Join Date: Sep 2011
Posts: 8,328
Quote:
Originally Posted by bayview View Post
The big question is why not use the boat you now own?

Because "3 years ago" when she wrote that post Sue did not own the GB you see in her picture. Really, you guys have stumbled into a time machine.
__________________
Craig

It's easier to fool people than to convince them that they've been fooled - Mark Twain
CPseudonym is offline  
Old 01-04-2015, 01:15 PM   #40
Guru
 
healhustler's Avatar
 
City: Longboat Key, FL
Country: USA
Vessel Name: Bucky
Vessel Model: Krogen Manatee 36 North Sea
Join Date: Oct 2009
Posts: 4,179
Quote:
Originally Posted by CPseudonym View Post
Because "3 years ago" when she wrote that post Sue did not own the GB you see in her picture. Really, you guys have stumbled into a time machine.
LOLROF
__________________

__________________
Larry

"I'd rather be happy than dignified".
healhustler is offline  
Closed Thread

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 03:58 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012