Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 30-11-2010, 17:14   #1
Eternal Member
 
Chief Engineer's Avatar

Join Date: Aug 2006
Location: North of Baltimore
Boat: Ericson 27 & 18' Herrmann Catboat
Posts: 3,798
Ringing in Engine Room While Sailing

transmission in reverse........prop had shown some signs of electrolysis due to stray current at marina...prop and zinc are tight.



I have heard of this before but I don't remember where.
__________________

__________________
Chief Engineer is offline   Reply With Quote
Old 30-11-2010, 17:27   #2
Registered User

Join Date: Dec 2009
Location: Puerto Galera, Philippine Islands
Boat: Santa Cruz 50
Posts: 2,960
Images: 4
The prop or strut can do this. Both should stop or change character if you turn the shaft by hand.

Maybe you are sailing too fast?
__________________

__________________
daddle is offline   Reply With Quote
Old 01-12-2010, 04:59   #3
Registered User
 
bruce smith's Avatar

Join Date: Jul 2008
Location: puget sound/ caribbean
Boat: never wrecked a boat while awake or sober
Posts: 330
My fixed 3 blade sings at about 5 knots.
__________________
bruce smith is offline   Reply With Quote
Old 01-12-2010, 05:31   #4
just ducky
 
sailorboy1's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: Northeast
Boat: 43' sloop
Posts: 8,432
Quote:
Originally Posted by Chief Engineer View Post
transmission in reverse........prop had shown some signs of electrolysis due to stray current at marina...prop and zinc are tight.



I have heard of this before but I don't remember where.

At what rpm? Probably a hamonic condition at a rpm range that should avoided (more to do with bearings and bushing wear). If so the chances of really finding the cause is slim. But changing anything in the drive train line-up might stop it, even as simple as putting the zincs at a different section of the shaft.
__________________
sailorboy1 is offline   Reply With Quote
Reply

Tags
engine

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
Hot Foot in the Engine Room Capt Phil The Sailor's Confessional 13 16-08-2010 10:21
Engine Room Blower wingover Construction, Maintenance & Refit 5 22-06-2010 13:58
Installing A/C in Engine Room ? knights dream Plumbing Systems and Fixtures 3 08-04-2010 08:07
More engine room excitement for Estrella AdamY Engines and Propulsion Systems 16 25-04-2007 12:43
Engine room insulation? Strygaldwir Engines and Propulsion Systems 22 26-11-2006 09:34


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

RV & Travel Trailer Communities

Our RV & Travel Trailer sites encompasses virtually all types of Recreational Vehicles, from brand-specific to general RV communities.

» More about our RV 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 2002-2012 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 04:55.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2014, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.