Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 19-01-2015, 20:40   #1
Registered User

Join Date: Mar 2012
Location: Eugene OR
Boat: Luders Cheoy Lee 36
Posts: 15
Bow Thruster Advice

Grand Banks 36 Europa, single in line prop. Thinking of adding a Bow Thruster to increase maneuverability for docking and such. PNWB in active marine environment, looking for advice on manufactures, pit falls and annual maintenance requirements.
__________________

__________________
Moonshine36 is offline   Reply With Quote
Old 19-01-2015, 20:51   #2
Registered User

Join Date: Aug 2014
Location: Connecticut
Boat: Catalina
Posts: 26
Re: Bow Thruster Advice

I put a Lewmar on my GB 32. Worth it's weight in gold. Just replace the zincs each year. Need a dedicated gel cell battery.


Sent from my iPhone using Cruisers Sailing Forum
__________________

__________________
ctsunsailor is offline   Reply With Quote
Old 19-01-2015, 22:15   #3
Registered User

Join Date: Mar 2012
Location: Eugene OR
Boat: Luders Cheoy Lee 36
Posts: 15
Re: Bow Thruster Advice

Why a dedicated battery, 20-feet away I have two banks of batteries or can do hydraulic off the main engine.
__________________
Moonshine36 is offline   Reply With Quote
Old 19-01-2015, 22:21   #4
Registered User

Join Date: May 2010
Location: Elsewhere on the Water
Posts: 571
Re: Bow Thruster Advice

Electric thrusters draw a lot of current. The voltage drop over 20 feet is the problem. Look into several thruster manufacturers, and read their installation manuals. It is critical that you provide recommended battery and wiring conditions.
__________________
St. Elsewhere is offline   Reply With Quote
Old 19-01-2015, 22:24   #5
Marine Service Provider

Join Date: Sep 2012
Location: Cook Islands Rarotonga
Boat: Hudson 50 and Formossa 51
Posts: 82
Re: Bow Thruster Advice

you will wonder how you docked without one , i have a 12.5 hp twin blade one on my 58ft ketch ,wow now i can go places. this is the first one i installed ,i've since done 2 more.easy but keep your batteries as close as possible. cheers
Attached Thumbnails
Click image for larger version

Name:	hole 011.JPG
Views:	238
Size:	158.9 KB
ID:	95751   Click image for larger version

Name:	holely boat 004.JPG
Views:	245
Size:	158.9 KB
ID:	95752  

Click image for larger version

Name:	hooollll 003.JPG
Views:	235
Size:	146.0 KB
ID:	95753  
__________________
bizzy is offline   Reply With Quote
Old 20-01-2015, 03:08   #6
Registered User

Join Date: Feb 2011
Location: France, britanny
Boat: Gibsea 302, 9m
Posts: 80
Re: Bow Thruster Advice

Quote:
Originally Posted by St. Elsewhere View Post
Electric thrusters draw a lot of current. The voltage drop over 20 feet is the problem. Look into several thruster manufacturers, and read their installation manuals. It is critical that you provide recommended battery and wiring conditions.
ok, they need a lot of current,
either a dedicated batterie with a 'small' line to the engine alternator,
or a large line direct to engine battery (always fully charged)
__________________
bil56 is offline   Reply With Quote
Old 20-01-2015, 17:45   #7
Registered User

Join Date: Aug 2014
Location: Connecticut
Boat: Catalina
Posts: 26
Re: Bow Thruster Advice

These things draw hundreds of amps for short periods of time.


Sent from my iPhone using Cruisers Sailing Forum
__________________
ctsunsailor is offline   Reply With Quote
Old 21-01-2015, 12:31   #8
Registered User
 
Tom.B's Avatar

Join Date: Sep 2009
Location: Cary, NC
Boat: 2000 Navigator 4200 Classic-Skinny Dippin'
Posts: 164
Images: 28
Re: Bow Thruster Advice

Get a hydraulic one. The endless usage you will never get tired of. :-)
__________________
Tom.B is offline   Reply With Quote
Old 22-01-2015, 08:50   #9
Registered User

Join Date: Feb 2006
Location: nyc/chesapeake
Boat: gozzard 44
Posts: 273
Re: Bow Thruster Advice

Forget DC power; go hydraulic if you have it.

Ronbo
__________________
ronbo1 is offline   Reply With Quote
Old 22-01-2015, 10:37   #10
Nearly an old salt
 
goboatingnow's Avatar

Cruisers Forum Supporter

Join Date: Jun 2009
Posts: 13,649
Images: 3
Bow Thruster Advice

Sorry forget hydraulic , it's will cost two to three times as much or more depending on the installation , get a good brand like side -power or similar , ( sleipner motor) , you may need a separate battery in the bow, but I have boats with about 20 foot runs and alls well.


Sent from my iPad using Tapatalk
__________________
Check out my new blog on smart boat technology, networking and gadgets for the connected sailor! - http://smartboats.tumblr.com
goboatingnow is offline   Reply With Quote
Old 22-01-2015, 11:11   #11
Registered User

Join Date: May 2010
Location: Elsewhere on the Water
Posts: 571
Re: Bow Thruster Advice

I have had a hydraulic Keypower thruster on my boat for 17 years. It has only required zinc replacements, and has been totally trouble free. I believe that they also make electric versions. You can see more information here: bow thruster, roll fin stabilizer, get home drive, hydraulics
__________________
St. Elsewhere is offline   Reply With Quote
Old 23-01-2015, 05:57   #12
Registered User
 
Neeltje's Avatar

Join Date: Mar 2014
Location: Saint Augustine, Florida
Boat: 1902 Dutch Tjalk, 64'
Posts: 297
Re: Bow Thruster Advice

I've got a pair of 24V Side Power thrusters (front & rear), each with its dedicated battery bank and charger. They can spin my 40-ton baby around like a top!
__________________
Neeltje is offline   Reply With Quote
Old 23-01-2015, 13:07   #13
cruiser

Join Date: Feb 2008
Location: North Charleston, SC
Boat: Camano Troll
Posts: 4,669
Re: Bow Thruster Advice

You don't need a dedicated battery but you do need serious battery power and serious cabling. Maintenance is nothing more than replacing anodes and cleaning growth off the tunnel and propeller (as part of your regular bottom cleaning).


There are some companies that specialize in installing bow thrusters and since you need a couple of very large, perfectly aligned holes in your hull, I suggest finding one of these companies and having them do the entire job. They do it all the time, have the tools and have the experience.


I have a bow thruster, it can be a big help.
__________________
rwidman is offline   Reply With Quote
Old 23-01-2015, 13:53   #14
Registered User
 
Neeltje's Avatar

Join Date: Mar 2014
Location: Saint Augustine, Florida
Boat: 1902 Dutch Tjalk, 64'
Posts: 297
Re: Bow Thruster Advice

Quote:
Originally Posted by rwidman View Post
You don't need a dedicated battery but you do need serious battery power and serious cabling. Maintenance is nothing more than replacing anodes and cleaning growth off the tunnel and propeller (as part of your regular bottom cleaning).


There are some companies that specialize in installing bow thrusters and since you need a couple of very large, perfectly aligned holes in your hull, I suggest finding one of these companies and having them do the entire job. They do it all the time, have the tools and have the experience.


I have a bow thruster, it can be a big help.
Personally, I'd opt for a dedicated battery & charger that you can run off of the existing house circuit, rather than having to route a really BIG cable from one end to the other of the boat. I can't see the added bow weight as being a problem on a 36' boat, and if you use a remote, you won't even have to hard-wire the controls back to the helm.

This said, I totally agree that a professional installation is the only way to go. They'll know what you need, where to put it, and how to do it.
__________________
Neeltje is offline   Reply With Quote
Old 23-01-2015, 15:52   #15
Registered User
 
markpierce's Avatar

Join Date: Aug 2010
Location: Central California
Boat: M/V Carquinez Coot
Posts: 3,413
Re: Bow Thruster Advice

My 24-volt bow thruster runs well off the house batteries 12 feet distant.
__________________

__________________
Kar-KEEN-ez Koot
markpierce 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Bow Thruster bottleinamessage Propellers & Drive Systems 33 11-11-2011 02:21
Bow Thruster and/or Windlass Battery Type? S/V Illusion Electrical: Batteries, Generators & Solar 13 23-08-2009 17:29
Bow thruster lbarnes Propellers & Drive Systems 7 24-08-2008 08:10
Bow Thruster for CSY 44 Capt'n Harry Monohull Sailboats 7 04-09-2007 10:17
What No Bow Thruster Pura Vida Off Topic Forum 3 02-05-2007 19:23



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 04:02.


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.