Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 24-10-2014, 07:31   #46
Registered User

Join Date: Sep 2014
Location: MICHIGAN
Boat: IRWIN, CITATION, 38'
Posts: 13
Re: Bow thrusters...

Here is my installation the caption didn't come thru. More files comming
Click image for larger version

Name:	6.jpg
Views:	124
Size:	320.5 KB
ID:	90259

Click image for larger version

Name:	8.jpg
Views:	128
Size:	401.3 KB
ID:	90260

Click image for larger version

Name:	10.jpg
Views:	131
Size:	409.3 KB
ID:	90261

Click image for larger version

Name:	12.jpg
Views:	132
Size:	422.8 KB
ID:	90262

Click image for larger version

Name:	12a.jpg
Views:	131
Size:	416.6 KB
ID:	90263

Click image for larger version

Name:	13.jpg
Views:	134
Size:	442.8 KB
ID:	90264

Click image for larger version

Name:	14.jpg
Views:	128
Size:	416.0 KB
ID:	90265

Click image for larger version

Name:	15.jpg
Views:	134
Size:	421.5 KB
ID:	90266

Click image for larger version

Name:	16.jpg
Views:	126
Size:	408.8 KB
ID:	90267

Click image for larger version

Name:	17.jpg
Views:	125
Size:	408.2 KB
ID:	90268

Click image for larger version

Name:	18.jpg
Views:	129
Size:	402.3 KB
ID:	90269

Click image for larger version

Name:	19.jpg
Views:	127
Size:	424.3 KB
ID:	90270 come through
__________________

__________________
jimbo31 is offline   Reply With Quote
Old 24-10-2014, 07:38   #47
Registered User

Join Date: Sep 2014
Location: MICHIGAN
Boat: IRWIN, CITATION, 38'
Posts: 13
Re: Bow thrusters...

[here are some more pics
]90271[/ATTACH]

Click image for larger version

Name:	25.jpg
Views:	135
Size:	433.0 KB
ID:	90272

Click image for larger version

Name:	609.jpg
Views:	136
Size:	406.3 KB
ID:	90273

Click image for larger version

Name:	814.jpg
Views:	136
Size:	442.7 KB
ID:	90274

Click image for larger version

Name:	915.jpg
Views:	126
Size:	441.0 KB
ID:	90275

Click image for larger version

Name:	920.jpg
Views:	136
Size:	430.1 KB
ID:	90276

Click image for larger version

Name:	9006.jpg
Views:	134
Size:	401.2 KB
ID:	90277
Attached Thumbnails
Click image for larger version

Name:	20.jpg
Views:	115
Size:	427.8 KB
ID:	90271  
__________________

__________________
jimbo31 is offline   Reply With Quote
Old 24-10-2014, 08:06   #48
Registered User

Join Date: Sep 2014
Location: MICHIGAN
Boat: IRWIN, CITATION, 38'
Posts: 13
Re: Bow thrusters...

My pictures of my installation are some where in this forum.

Jim
__________________
jimbo31 is offline   Reply With Quote
Old 12-11-2014, 20:23   #49
Registered User
 
FamilyVan's Avatar

Join Date: Nov 2014
Posts: 1,779
Re: Bow thrusters...

I haven't read every post on here, but I know a little bit about thrusters. In your post you asked about high winds and higher vessel speeds. Bow thrusters work very well at low speeds and low winds and can make docking in tight spaces much easier.
With speed, whether due to forward speeds or leeway caused by winds you get increasingly diminishing results from thrusters. There is a concept called "boundary layer", this is an area of water, that for lack of easier explanation is an area of water that sticks to your hull, the higher the speed the bigger the boundary area and the less effective your thruster. anything over 3 or 4 knots you get basically nothing from your thruster. So if you buy it to complement normal ship handling techniques they are fantastic. If it is to save your neck on windy days, they really don't do anything, not opinion here, but hydrodynamic principles. I was running a tour boat a few years back, double decker, about 90 feet. We were coming into a tight exposed dock, (about a 105 foot dock space). I convinced the owner to install a dc thruster. It worked okay, it definitely softened hard landings in big blows, but it never really got me out of a jam. To summarise, they definitely help maneuvering in tight places, but when docking in really tough conditions they don't help much, if at all. Until 2011 I had always used hydraulic thrusters, I can definitely say the results from a high torque dc thruster are more favourable, especially in high winds, they just push so much water so fast.
__________________
FamilyVan is offline   Reply With Quote
Old 12-11-2014, 21:59   #50
Sponsoring Vendor

Community Sponsor
Cruisers Forum Supporter

Join Date: Apr 2006
Location: Port Alberni, BC Canada
Boat: Uniflite 31, 1973
Posts: 128
Images: 1
Important points for a bow thruster installation

Four things for the most thrust from your thruster:

#1, the thing I hardly ever see done right: Where the tunnel meets the hull the corner should have a radius not less than 1/10th the tunnel diameter. 20% or more of your thrust can be lost here, with a corresponding increase in noise. This is due to turbulence created by the incoming water flowing over the sharp edge.

2. Top of tunnel to waterline 3 times tunnel diameter

3. Tunnel as far forward as possible

4. If electric, wiring sized for <5% voltage drop

... and the above is all in the installation instructions...
__________________
Experience develops good judgment; bad judgement develops experience.
EngNate 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 THRUSTERS FOR MY CAT jenkolav40 Multihull Sailboats 27 25-07-2017 01:56
Bow Thrusters markpierce Engines and Propulsion Systems 29 06-09-2010 08:13
Bow thrusters. CARL Propellers & Drive Systems 22 15-07-2008 12:10
BOW THRUSTERS ANCHOR WINDLASS nythll Meets & Greets 5 10-10-2007 21:21



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 22:29.


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.