Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 11-03-2016, 13:39   #1
Registered User

Join Date: Nov 2014
Posts: 24
Electric motor for sail boat

Our 34 year old Yanmar diesel died a few years ago. She took us on an amazing adventure on the SF Bay. We looked at all the options and decided to repower with electric.

We installed it ourselves and are extremely happy. We have a range of about 10 miles at 4.5 knots. More if we go slower. Since we only use the motor to get in and out of the marina, it works out great.

We are mostly day sailors on our Newport 30. We could not have made a better decision. We plug in at night to recharge. Our engine is from Electric Yachts. We call it Tesla sailing.


Sent from my iPhone using Cruisers Sailing Forum
__________________

__________________
fungod is offline   Reply With Quote
Old 11-03-2016, 16:31   #2
Senior Cruiser
 
StuM's Avatar

Cruisers Forum Supporter

Join Date: Nov 2013
Location: Port Moresby,Papua New Guinea
Boat: FP Belize Maestro 43
Posts: 6,713
Re: Electric motor for sail boat

Yep, good example of an appropriate "use case" for an electric motor.

They are certainly not for everyone, but for this case, they are probably the best solution.

(They are not for me - my use cases are totally different )
__________________

__________________
StuM is offline   Reply With Quote
Old 12-03-2016, 03:58   #3
Registered User

Join Date: Apr 2013
Posts: 4,881
Re: Electric motor for sail boat

Good use of the technology. If you don't need significant range or speed and aren't worried about resale, it's a good solution.
__________________
valhalla360 is online now   Reply With Quote
Old 12-03-2016, 04:14   #4
Now on the Dark Side: Stink Potter.
 
CSY Man's Avatar

Cruisers Forum Supporter

Join Date: Aug 2003
Location: Ft. Lauderdale
Boat: 2001 Albin 28TE.
Posts: 3,399
Images: 115
Re: Electric motor for sail boat

Do you use the house bank to run the motor?
What size batteries, how many HP?

My previous boat was an 18' Duffy. 8 Golf Cart batteries, 5HP. It would go 5-6 hrs easily but we never went more than 2-3, just cocktail cruising. Quiet, no fumes, easy to talk and play music, etc.
__________________
Life is sexually transmitted
www.odincharters.com
www.susanhanssen.com
CSY Man is offline   Reply With Quote
Old 12-03-2016, 08:15   #5
Registered User
 
duefocena's Avatar

Join Date: Aug 2010
Location: Newport Beach, CA.
Boat: TPI Lagoon Catamaran 42'
Posts: 234
Images: 1
Re: Electric motor for sail boat

Has anyone knowledge of Catamarans or other twin engine applications using one electric and one diesel ? Seems one could charge for the other during operation.
__________________
duefocena is offline   Reply With Quote
Old 12-03-2016, 08:57   #6
Registered User

Join Date: Dec 2015
Location: Panama / Bahamas / Newport RI / Marathon Fl (now mostly)
Boat: Bristol CC 41.1
Posts: 286
Re: Electric motor for sail boat

One day they may make cheap lithium-ion batteries for sailboats or even hydrogen fuel cells for them... but as always... it's all about enough electrical storage and regeneration.

I am tempted at times to dream about a nuclear-powered auxiliary like a submarine has when I need to bleed the diesel...
__________________
sailingfarmer is offline   Reply With Quote
Old 12-03-2016, 10:01   #7
Registered User
 
Cadence's Avatar

Join Date: Dec 2008
Location: SC
Boat: None,build the one shown of glass, had many from 6' to 48'.
Posts: 6,063
Re: Electric motor for sail boat

Quote:
Originally Posted by fungod View Post
Our 34 year old Yanmar diesel died a few years ago. She took us on an amazing adventure on the SF Bay. We looked at all the options and decided to repower with electric.

We installed it ourselves and are extremely happy. We have a range of about 10 miles at 4.5 knots. More if we go slower. Since we only use the motor to get in and out of the marina, it works out great.

We are mostly day sailors on our Newport 30. We could not have made a better decision. We plug in at night to recharge. Our engine is from Electric Yachts. We call it Tesla sailing.


Sent from my iPhone using Cruisers Sailing Forum
Tesla was the AC guy Edison was the DC guy.
__________________
Cadence is offline   Reply With Quote
Old 12-03-2016, 10:13   #8
Registered User
 
hamburking's Avatar

Join Date: Feb 2013
Location: Kingston Ont Canada
Boat: Looking for my next boat!
Posts: 2,149
Re: Electric motor for sail boat

Quote:
Originally Posted by fungod View Post
We installed it ourselves and are extremely happy. We have a range of about 10 miles at 4.5 knots. More if we go slower.
Sent from my iPhone using Cruisers Sailing Forum
I'd be interested to know the details of the motor, and your battery bank. Have you considered adding more batteries? Any chance you could post some pics of your engine bay? Yes, weird boat porn...but I'm not the only one who wants to see whats under there, I'm sure.

Plus, you forgot to say how wonderfully quiet it is...no diesel fuel stinking up the place. I would think removing the diesel tank would allow a few more batteries? Any idea of how much weight in total (yanmar plus fuel plus tank plus fuel filters, plus exhaust pipes, etc) was removed?

IMHO, electric motors are the future of sailboats. The question (problem) is getting the electricity. Fuel cells, linear engine generator, better batteries...who knows? Could you run longer if you had a little Honda 2000 generator running a few chargers (one per battery) ? Whats your top speed now?
__________________
hamburking is offline   Reply With Quote
Old 12-03-2016, 10:34   #9
Registered User

Join Date: Jan 2014
Posts: 19
Re: Electric motor for sail boat

Until we get affordable, higher-capacity batteries, the limiting factor is this:

One pound of diesel oil produces the energy equivalent of about 25 pounds of lead-acid batteries.
__________________
suenodelmar is offline   Reply With Quote
Old 12-03-2016, 11:08   #10
Registered User
 
Scout 30's Avatar

Join Date: Oct 2014
Location: Florida
Boat: Scout 30
Posts: 2,349
Re: Electric motor for sail boat

Quote:
Originally Posted by fungod View Post
Our 34 year old Yanmar diesel died a few years ago. She took us on an amazing adventure on the SF Bay. We looked at all the options and decided to repower with electric.

We installed it ourselves and are extremely happy. We have a range of about 10 miles at 4.5 knots. More if we go slower. Since we only use the motor to get in and out of the marina, it works out great.

We are mostly day sailors on our Newport 30. We could not have made a better decision. We plug in at night to recharge. Our engine is from Electric Yachts. We call it Tesla sailing.


Sent from my iPhone using Cruisers Sailing Forum
Can you tell us which motor you went with?
__________________
Scout 30 is offline   Reply With Quote
Old 12-03-2016, 11:59   #11
Senior Cruiser
 
zengirl's Avatar

Cruisers Forum Supporter

Join Date: Jun 2014
Location: Florida
Boat: 1985 Freedom Mach1 32'
Posts: 292
Re: Electric motor for sail boat

Once again, can you give more details....battery bank etc thanks
__________________
"I'm an idealist. I don't know where I'm going, but I'm on my way." Carl Sandberg
zengirl is offline   Reply With Quote
Old 12-03-2016, 13:42   #12
Registered User

Join Date: Aug 2009
Boat: Tayana 37
Posts: 51
Exclamation Re: Electric motor for sail boat

Quote:
Originally Posted by suenodelmar View Post
Until we get affordable, higher-capacity batteries, the limiting factor is this:
One pound of diesel oil produces the energy equivalent of about 25 pounds of lead-acid batteries.
This is incorrect

The appropriate comparison is the energy density of diesel compared to a battery's stored energy.
http://<b>https://en.wikipedia.org/w...gy_density</b>

Diesel / Fuel oil has an Energy density of 48 MJ/kg
Lead Acid battery has an Energy Density of 0.17 MJ/kg

Thus the same mass of diesel produces 282 times more energy than a similar mass of lead acid battery.
__________________
kish is offline   Reply With Quote
Old 12-03-2016, 14:14   #13
Registered User

Join Date: Dec 2015
Location: Panama / Bahamas / Newport RI / Marathon Fl (now mostly)
Boat: Bristol CC 41.1
Posts: 286
Re: Electric motor for sail boat

Now... Matter-Antimatter fueled engines....
__________________
sailingfarmer is offline   Reply With Quote
Old 12-03-2016, 14:29   #14
Registered User

Join Date: May 2010
Posts: 666
Re: Electric motor for sail boat

Great for a day sailer in calm condition with 100% reliable sail system. Sailing in the Med requires a lot of motoring and sometimes the weather can require motoring a long way. A Honda 2000 generates 2000 watts and will drive a 3 hp motor at the very outside. My boat has a 55 HP motor and I need every one of them for hour after hour.
__________________
dlymn is offline   Reply With Quote
Old 12-03-2016, 14:35   #15
Registered User
 
lonesoldier0408's Avatar

Join Date: Jun 2013
Boat: Luger, Southwind, 21
Posts: 358
Re: Electric motor for sail boat

Quote:
Originally Posted by Cadence View Post
Tesla was the AC guy Edison was the DC guy.

Funny you mention that. A DC motor powering an AC generator could be the answer. One battery bank being charged while powering the generator. Swap banks and repeat.


Still surrounded by anchors.
__________________

__________________
lonesoldier0408 is offline   Reply With Quote
Reply

Tags
electric, electric motor, motor, sail

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale: PAR Electric System Water Pump and JABSCO Electric Bilge Pump hanks Classifieds Archive 3 05-03-2014 20:03
Motor boat versus sail boat niel12 Multihull Sailboats 85 11-10-2013 00:55
For Sale: Electric Motors and hydraulic electric lifter arms 4 sale Sea Shoes Classifieds Archive 0 25-03-2012 08:46
Motor boat plus a sail boat equils a Motor sailer? niel12 Multihull Sailboats 11 02-07-2011 13:15
Recovered electric boat motor louxwe Engines and Propulsion Systems 2 10-03-2009 15:11



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 06:09.


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.