Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 21-05-2012, 06:18   #16
Registered User
 
Double-Wide's Avatar

Join Date: Aug 2008
Location: Cruising Bahamas
Boat: Seawind - 1160
Posts: 113
Re: WHat is the range of your boat under power?

Our 38' cat motored from Key West to Galveston without refueling. About 1150 nm. We wanted to sail but that week in June had NOOOOO wind.
__________________

__________________
Double-Wide is offline   Reply With Quote
Old 21-05-2012, 06:31   #17
Registered User
 
mbianka's Avatar

Join Date: Mar 2008
Posts: 2,125
Images: 1
Re: WHat is the range of your boat under power?

Quote:
Originally Posted by Teeto View Post
We can get about 750 to 800 miles with motors alone on our 44 foot sailing cat, but why would you choose to do it with all that noise, smell, expense and poor motion?
Indeed! I can understand using the motor when there's no wind but, more and more I see this:
DOESN'T ANYBODY SAIL ANYMORE? - YouTube
__________________

__________________
Capt. Mike
mbianka is offline   Reply With Quote
Old 21-05-2012, 07:09   #18
Marine Service Provider
 
Tony B's Avatar

Join Date: Jul 2011
Location: Presently in Rogersville, Al
Boat: Mainship 36 Dual Cabin
Posts: 695
Re: WHat is the range of your boat under power?

Quote:
Originally Posted by mbianka View Post
Indeed! I can understand using the motor when there's no wind but, more and more I see this:
DOESN'T ANYBODY SAIL ANYMORE? - YouTube
I see it all of the time. It's not only a more comfortable ride to sail but I sail faster than I motor.
I just don't understand it either.
__________________
Mainship 36 DC - 1986
Retired and Full Time Cruising the Eastern U.S. inland Waterways
www.FreeBoatProjects.com
Tony B is offline   Reply With Quote
Old 21-05-2012, 16:24   #19
Registered User
 
Burls's Avatar

Join Date: Apr 2010
Location: Me: Hong Kong, Boat: Turkey
Boat: Lagoon 380 - Times like these. Port: Mooloolaba, Australia
Posts: 86
Re: What is the range of your boat under power?

Here's the figures for our Lagoon 380:


Fuel capacity: 2 x 110 Liter tanks (Diesel)


For trip planning purposes (Conservative), each engine burns approx 2.1 Liters of diesel per hour @ 2100 RPM, which gives up to approx 52 Engine hours per engine per tank.


One engine @ 2100 RPM gives approx 4.3 kts of speed in calm water, which gives approx 234 nautical miles per tank using one engine.


2 engines at 2100 RPM gives approx 5.5 knots



Burls
__________________
I've sent in my application to the Real World. So I'm hoping to hear back from that....
Burls is offline   Reply With Quote
Old 21-05-2012, 18:52   #20
Registered User
 
simonmd's Avatar

Join Date: Nov 2010
Location: Sant Carles, S Spain
Boat: 30ft Catalac 900 "Rubessa"
Posts: 876
Re: What is the range of your boat under power?

With both engines going, based on my last couple of trips to and from Gibraltar, I've worked out that with a 22 gallon fuel capacity, mine will do 308 miles. However, with one engine at a reduced speed I dare say 500+ is possible.
__________________
Previous owner of a 1994 Catalac 900, now sadly SOLD
simonmd is offline   Reply With Quote
Old 21-05-2012, 19:06   #21
Registered User
 
Strygaldwir's Avatar

Join Date: Dec 2004
Location: Deale, Maryland
Boat: SeaView - Privilege 37
Posts: 1,019
Images: 5
Re: What is the range of your boat under power?

Aprx 500 miles.

Yes, you can take off the mast and boom. I have seen folks doing this when sailing the circle.
__________________
Strygaldwir is offline   Reply With Quote
Old 21-05-2012, 19:39   #22
Registered User
 
boat_alexandra's Avatar

Join Date: Aug 2009
Location: grenada
Boat: bristol 27
Posts: 2,554
Re: What is the range of your boat under power?

My propulsion by sculling oar is optimized to 2 knots with up to a 3 hour range (then I need a rest heh) The overall range is limited by food for energy.

The other form of propulsion is also basically unlimited as it relies entirely on solar power. involves a near-silent dc electric motor consuming 250 watts and pushing the boat also at 2 knots (great to take turns with when sculling) There are enough solar panels to power the motor without battery drain in direct sunlight, however the battery bank limits to only 20 hours of runtime without sun.

Both of these are only used when there is either less than 3 knots of wind, or in relatively protected waters. There are cases when the true wind is on the beam, but only 3 knots, and it is possible to sail close hauled with the motor running at move 4 knots, and my boat is not a racer. Without the motor I would drop to 2.5 knots. I have done this while capturing enough solar power at the same time while sailing.
__________________
boat_alexandra is offline   Reply With Quote
Old 14-06-2012, 05:00   #23
Registered User
 
DavefromNZ's Avatar

Join Date: Sep 2011
Location: NZ
Boat: Lagoon 450
Posts: 313
About 1600nm by running single engines at 6.5kts at 3ltrs per hour. It's a Lagoon 450 with 1000ltrs fuel
__________________
DavefromNZ is offline   Reply With Quote
Old 14-06-2012, 05:13   #24
Registered User
 
dirkdig's Avatar

Join Date: Oct 2007
Location: Geelong,Australia
Boat: Lagoon 440 Pathfinder
Posts: 831
Thats good going Dave.
The 450 is a fair bit heavier and uses a lot less fuel,goes faster at the rate of 3 litres an hour too.
__________________
dirkdig is offline   Reply With Quote
Old 20-06-2012, 08:07   #25
Registered User

Join Date: Aug 2011
Location: Melbourne Australia
Boat: Paper Tiger 14 foot, Gemini 105MC 34 foot Catamaran Hull no 825
Posts: 1,505
Re: What is the Range of Your Boat Under Power?

At 7 knots, I burn .75 gallons an hour, I have 60 gallons on board in tanks,
I also carried 7 x 5 gallon containers, Total fuel on board, 95 gallons.

So I estimated a range of approx 500 Nautical miles, At 7 knots on one motor,

The large amount of fuel carried was just a safety factor for me,
__________________
Mr B is offline   Reply With Quote
Old 20-06-2012, 08:41   #26
Senior Cruiser
 
Sailmonkey's Avatar

Cruisers Forum Supporter

Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 4,857
Re: What is the Range of Your Boat Under Power?

We carry +60 hours of fuel in the tank and +22 hours of fuel on deck. In ideal conditions 82 hours of motoring will yield 426 miles. We only plan on being able to cover 350 under power, but have done 500 burning what I consider the in tank reserve (and having an extra 5 gallons unused on deck).
__________________
Sailmonkey is online now   Reply With Quote
Old 20-06-2012, 12:42   #27
Registered User
 
TeddyDiver's Avatar

Join Date: Aug 2010
Location: Arctic Ocean
Boat: Under construction 35' ketch
Posts: 1,645
Images: 2
Re: What is the Range of Your Boat Under Power?

Just estimated so far becouse the build is still going on but shoud do 2200 nm at 6kn or 1100 Nm at 8kn with fuel tanks of 1.5tons.
__________________
TeddyDiver is offline   Reply With Quote
Old 01-07-2012, 20:36   #28
Registered User

Join Date: Jul 2011
Posts: 36
Re: What is the Range of Your Boat Under Power?

I am finishing a 31 foot Searunner with a Saab 18 hp diesel and since I am a power boat person I plan to use it as a power cruiser.

To really learn this subject you should read "Voyaging Under Power" by Robert Beebe. It has a detailed technical section on fuel usage and the math of Range under power. Buellers "the Troller Yacht" covers this ground too, but Beebe's work is really the bible of this subject for small boat voyaging.

The case for power is pretty good comparing mono hull sail vessels against mono hull power vessels. Researching multi hull power vessel performance is a little more difficult.

I don't intend to make the case here for power in a multi hull, and my reasons for going the power route are mine alone, but the one thing to keep in mind is that the weight of the vessel is the number one factor that will alter the range under power.

The conversion of a sailing mono hull to power cruising is handicapped by the ballast a mono hull is burdened with, a multi hull conversion does not suffer this burden.

A steadying sail is a good device on power mono hulls and should be considered on a power multi hull too. For obvious reasons flopper stoppers and other stabilizing gadgets found in mono hulls would not be part of a cruising multi hulls kit.

My goal is to burn .6 gallons per hour at 6 knots or 10 nmpg so 100 gallons would give me a 1000 mile range. There is room in my hull for over 250 gallons, and slowing down even to 5.5 Knts would boost my range - but I do not intend to pack around that much fuel on coastal cruises. For long hops additional 55 gallon drums would obviously add over 500 miles of range each. There is space inside for half a dozen of them, but it would be an ugly situation.

Six knots gives a consistent 1000 miles a week, which most mono hull sailors would kill for. I really can't picture anything short of a CAT 5 Hurricane capsizing a power multi hull boat. Even then it wouldn't be a capsize so much as the wind flinging the poor little boat through the air.

I would give you more accurate figures, but at the lower end of the scale fuel burn is more difficult to approximate than it is with heavier vessels, and because I am unsure what my actual water line length will be when the boat is floating.

Most multi hulls strive to keep weight to a minimum and so fuel capacity is much less for even a large multi hull than it is for a power vessel. Yet when you look at those people who responded to your question as asked, you see that fuel economy is very good at displacement speeds, and modest amounts of fuel can give you a substantial range.
__________________
Siskiyous is offline   Reply With Quote
Old 03-07-2012, 22:16   #29
Registered User
 
Barra's Avatar

Join Date: Sep 2011
Location: Cruising Greek Islands
Boat: Phisa 42
Posts: 720
Re: What is the Range of Your Boat Under Power?

On my 42 foot cat with 2 x 30hp yanmars and 330 litres fuel i get between 500 and 800 miles range so far but alot depends on sea state and how fast i want to go. most economical is single engine in calm seas and 4.5 knots for tad over 800 miles.
__________________
Barra is offline   Reply With Quote
Old 03-07-2012, 23:07   #30
Registered User
 
ShaunJ's Avatar

Join Date: Oct 2010
Location: Md, USA
Posts: 429
Re: What is the Range of Your Boat Under Power?

I burn .68 GPH going 6 knots and hold 60 gal. I figure my range with a third in reserve to be about 350 miles. I am sure I can push it a bit more than that.
__________________

__________________
ShaunJ
I get knocked down...But get up again...
You're never going to keep me down....


ShaunJ is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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



Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 20:49.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.