Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 02-10-2009, 09:40   #16
Registered User

Join Date: Sep 2007
Location: Cayuga Lake NY - or on the boat somewhere south of there
Boat: Caliber 40
Posts: 1,096
I saw one on a boat on the hard in my marina. It is mounted on the outside of the boat on the leading edge of the bow about a foot under the water line. Looks kind of like a "normal" bow thruster in a tunnel except that its on the outside. Looked to me like it would be horrible for both speed and performance in any situation other than when you were actually using it - but I have no actual experience or even rumor to base that impression on.
__________________

__________________
sck5 is offline   Reply With Quote
Old 02-10-2009, 11:14   #17
Registered User
 
speciald@ocens.'s Avatar

Join Date: Apr 2008
Location: On the boat - Carib, Chesapeake
Boat: 58 Taswell AS
Posts: 1,139
I've seen "external" stern thrusters on power boats but never an external bow thruster. They are either through-hull with a big tunnel hole or retractable that drop down thru the hull
__________________

__________________
speciald@ocens. is offline   Reply With Quote
Old 02-10-2009, 11:32   #18
Registered User

Join Date: Sep 2007
Location: Cayuga Lake NY - or on the boat somewhere south of there
Boat: Caliber 40
Posts: 1,096
the one I saw on the bow was on a powerboat, not a sailboat.
__________________
sck5 is offline   Reply With Quote
Old 02-10-2009, 13:31   #19
Registered User
 
Microship's Avatar

Join Date: Dec 2005
Location: living aboard in Friday Harbor, WA
Boat: Vic Franck Delta 50
Posts: 699
Images: 7
The reference to external thrusters may have referred to the Sideshift. These are indeed usually used on power boats.

I'm also intrigued by the Willdo water-jet types, and am doing a few experiments along those lines. My boat doesn't back well either, and there is virtually no propwalk - the MaxProp is on the trailing edge of a modified fin, then there is a HUGE gap before a skeg-hung rudder. Steerageway is the only way, and that can get dicey close-in. I need a thruster too, and the $13K quote for a tunnel was not inviting... so I'm playing with a homebrew external approach.

Cheers,
Steve
__________________
M/V Datawake
Nomadic Research Labs
Microship is offline   Reply With Quote
Old 02-10-2009, 13:59   #20
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,592
Images: 240
I've never worked with either but the "Marino Extern" seems a more elegant product (to me) than the Sideshift external truster.

MARINNO * Bugstrahlruder * Heckstrahlruder * EXTURN Das externe Bug- und Heckstrahlruder
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 03-10-2009, 01:37   #21
Registered User
 
James S's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: Yemen & Lebanon... the sailboat is in Lebenon, the dhow is in Yemen
Boat: 1978 CT48 & 65ft Cargo Dhow
Posts: 5,816
Images: 139
Quote:
Originally Posted by Microship View Post
The reference to external thrusters may have referred to the Sideshift. These are indeed usually used on power boats.

I'm also intrigued by the Willdo water-jet types, and am doing a few experiments along those lines. My boat doesn't back well either, and there is virtually no propwalk - the MaxProp is on the trailing edge of a modified fin, then there is a HUGE gap before a skeg-hung rudder. Steerageway is the only way, and that can get dicey close-in. I need a thruster too, and the $13K quote for a tunnel was not inviting... so I'm playing with a homebrew external approach.

Cheers,
Steve
13K sure seems high for a boat your size Steve.
Have you looked at the Side Power they are a conventional thruster with a very good reputation....I think my 10" 11hp was around 5KUSD.

Any news on selling the small boat?
Any worthy takers?
__________________
James
S/V Arctic Lady
I love my boat, I can't afford not to!
James S is offline   Reply With Quote
Old 03-10-2009, 01:47   #22
Registered User
 
Microship's Avatar

Join Date: Dec 2005
Location: living aboard in Friday Harbor, WA
Boat: Vic Franck Delta 50
Posts: 699
Images: 7
Quote:
Originally Posted by James S View Post
13K sure seems high for a boat your size Steve.
Have you looked at the Side Power they are a conventional thruster with a very good reputation....I think my 10" 11hp was around 5KUSD.

Any news on selling the small boat?
Any worthy takers?
Hi James...

Well, that was the installed price; I think the number you mention is about what the hardware costs. It's a lot of surgery

No serious nibbles on the Microship, though I had a chat with a broker (I know...) the other day. The market for expensive one-person geeky amphibian micro-trimarans is somewhat specialized, but maybe the visibility of YW would be good.

In the meantime, I've spent far too many months chasing real estate that has shop space and is close to moorage... and have decided to stick with what feels best to an old technomad: wheel estate! I'm building a mobile lab in a 24-foot trailer, and will just park it at the marina for most of the winter.

One of the many projects is at least a test-bed thruster, pivoting off the bow. I've been planning to do this with stock trolling motors, but am starting to see the other benefits of having a serious water pump aboard. Maybe.....

Cheers,
Steve
__________________
M/V Datawake
Nomadic Research Labs
Microship is offline   Reply With Quote
Old 03-10-2009, 04:45   #23
Registered User
 
James S's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: Yemen & Lebanon... the sailboat is in Lebenon, the dhow is in Yemen
Boat: 1978 CT48 & 65ft Cargo Dhow
Posts: 5,816
Images: 139
Steve

It seems to me that there was some talk on a thread several months back about the water pumps, and some folks that tried them.

After looking at what you’ve done and you're capabilities I'm sure you can come up with some innovation.
I’ve sent you a PM with some input.
__________________
James
S/V Arctic Lady
I love my boat, I can't afford not to!
James S is offline   Reply With Quote
Old 03-10-2009, 06:14   #24
Registered User
 
bottleinamessage's Avatar

Join Date: Jan 2006
Location: Part time C.L.O.D in Velcro Beach
Boat: Jeanneau, SO 42.1 "Far Niente"
Posts: 251
I had a Vetus 95kph installed n our 40 Jeanneau a few years ago. Love it! Sure makes life easy in difficult situations. I would lean toward avoiding internal or retracting thrusters. Just something else likely to fail.
__________________
I wish I'd done this sooner!
bottleinamessage is offline   Reply With Quote
Old 03-10-2009, 06:35   #25
Registered User

Join Date: Jun 2008
Location: Corpus Christi Texas
Boat: boatless atm
Posts: 724
Send a message via MSN to bobfnbw
How can a thruster in the bow, make backing up straight on a boat that wont eaiser?
Pardon my ignorance. Never used one. But it seems to me that the dynamics of it would still throw the stern off.

Before investing in a large expense live a thruster, perhaps upgrade to a max prop, folding prop. They are known to help the backing up issue.

My PO wanted a bow thruster, and after docking the boat a few times I understand why, but on a 40 footer, it seems to me that the max prop would be a better choice initally, but at 4K, it will have to wait..... lets see, new refrigeration or a max prop.... no contest.

TO be truley a good backer upper ... I would think both bow and stern thrusters would be needed.... imagine the power drain... ouch.

BTW, If I did put in a thruster I would use the largest cable I could get my hands on... like 4/0 instead of 1awg.

Bob
__________________
bobfnbw is offline   Reply With Quote
Old 03-10-2009, 06:46   #26
Registered User
 
s/v Moondancer's Avatar

Join Date: Nov 2008
Location: Fiji but heading for Alaska
Boat: Tayana 55
Posts: 1,226
bobfnbw,

If you set the rudder straight and back down slowly any movement of the bow in one direction will move the stern the other way...so with practice you can at least keep the boat backing straight and have more influence on direction than with the rudder.

My boat steers beautifully in reverse but only above 2-3 knots! which is why at low speed I have to use the bowthruster. I hardly ever use it for docking in forward gear except perhaps to move he bow out at the last moment whan I come in a little close.
__________________
Phil

"Remember, experience only means that you screw-up less often."
s/v Moondancer is offline   Reply With Quote
Old 03-10-2009, 07:22   #27
Registered User
 
bottleinamessage's Avatar

Join Date: Jan 2006
Location: Part time C.L.O.D in Velcro Beach
Boat: Jeanneau, SO 42.1 "Far Niente"
Posts: 251
Well you'e backing into a slip with the wind blowing 20+ across the bow. Don't say "don't back in"! You're trying to back out of a slip with 20+, think you're going to get the bow up into the wind in a narrrow fairway? Picking up a mooring ball penant in the Bahamas once. Wind and waves. I got as close as I could and puched the bow over with old "Trusty Thrusty". Diane snagged the line and I went forward to get it attached, couldn't hold the boat against the wind,, waves and current. I told her to run to the cockpit and hit the thruster, bow moves, no strain, penant attached. Watched three other boats struggle for nearly an hour to get on to the moorings. I could go on. For us, money very well spent! BTW, I have a Max Prop and love it. Flame away!
__________________
I wish I'd done this sooner!
bottleinamessage is offline   Reply With Quote
Old 03-10-2009, 09:41   #28
Registered User

Join Date: Nov 2005
Location: Ohio
Posts: 2,313
That's basicly how we use it also. Another nice feature is picking up the mooring, I can't see it for the last 50 feet or so and my wife directs me by pointing with the boat hook.

Quote:
Originally Posted by s/v Moondancer View Post
bobfnbw,

If you set the rudder straight and back down slowly any movement of the bow in one direction will move the stern the other way...so with practice you can at least keep the boat backing straight and have more influence on direction than with the rudder.

My boat steers beautifully in reverse but only above 2-3 knots! which is why at low speed I have to use the bowthruster. I hardly ever use it for docking in forward gear except perhaps to move he bow out at the last moment whan I come in a little close.
__________________
Joli is offline   Reply With Quote
Old 03-10-2009, 10:10   #29
Registered User
 
bottleinamessage's Avatar

Join Date: Jan 2006
Location: Part time C.L.O.D in Velcro Beach
Boat: Jeanneau, SO 42.1 "Far Niente"
Posts: 251
We have headsets called "marraige savers". LOL Another benefit I enjoy is when you back into a slip with short finger docks and bow pilings way out front. We back in and hook one sternline into the cockpit, pull forward hit the thruster and bow goes to one piling and Diane drops a line on it, then repeat the process for the other and ease back into the slip and set all the lines. Way too easy! She also accused me of having a bad case of "bow thruster envy", she was right!
__________________
I wish I'd done this sooner!
bottleinamessage is offline   Reply With Quote
Old 03-10-2009, 10:29   #30
Registered User

Join Date: Jun 2008
Location: Corpus Christi Texas
Boat: boatless atm
Posts: 724
Send a message via MSN to bobfnbw
Guess I'll have to put it on the list!!
__________________

__________________
bobfnbw is offline   Reply With Quote
Reply

Tags
paracelle

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
Another New Hello . . . with Questions. Can You Help ? sunangel Meets & Greets 14 28-11-2010 19:08
Bowthruster survey; Maxpower/ Sidepower or Vetus Dennis Sol Propellers & Drive Systems 5 03-03-2009 13:54
Questions Captain_Raz General Sailing Forum 2 31-12-2008 00:56
24v bowthruster on a 12V system James S Construction, Maintenance & Refit 21 30-10-2008 18:21
A few sailing questions... aignam General Sailing Forum 7 15-02-2008 14:40



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 20:43.


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.