Sailing with transmission in reverse-what is that sound? - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > General Interest > General Discussion (sailing related)
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #1  
Old 06-25-2007
Member
 
Join Date: Jun 2007
Location: Minnesota
Posts: 44
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
majorm is on a distinguished road
Sailing with transmission in reverse-what is that sound?

Ok, so I went sailing this weekend and put the transmission in reverse (I have a Volvo saildrive) as suggested by other prominent members of this forum, and there was a low humming sound which went away when the engine was put in neutral (replaced by the sound of the prop turning). It was fairly quiet such that as the boat speed got above 6 knots I could barely hear it over the sound of the wind and waves. What is that from? Since it was hard to hear at higher boat speeds, I am sure Giu has never heard it.
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 06-26-2007
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
It could be the sound caused by the water moving by the stopped propellor... do you have a fixed-blade prop or a feathering/folding prop? Is it two or three-blades? This information would help narrow it down.
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 06-26-2007
bestfriend's Avatar
Hitchin' a ride
 
Join Date: Sep 2006
Location: In my mind, I live in Oslo
Posts: 3,191
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
bestfriend is a jewel in the rough bestfriend is a jewel in the rough bestfriend is a jewel in the rough
A.) Its the sound of silence
B.) You can finally hear the hamster wheel in your head
C.) I have no idea, but SD is probably right
__________________
Great men always have too much sail up. - Christopher Buckley


Vaya con Dios
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 06-26-2007
tdw's Avatar
tdw tdw is offline
Super Fuzzy Moderator
 
Join Date: Oct 2006
Location: Sydney Australia
Posts: 14,946
Thanks: 5
Thanked 81 Times in 75 Posts
Rep Power: 10
tdw is a jewel in the rough tdw is a jewel in the rough tdw is a jewel in the rough
Maybe you had simply attracted a Humming Fish or else you had skewered a passing Tenor Shark or a Song Ray.. Couldn't have been a whale cos they sing but don't hum while of Fiddler Crabs are purely instrumentalists.

Then again it could have simply been the sound of impending empty walletitus.
__________________
Andrew B

"Do you think God gets stoned? I think so... Look at the platypus." Robin Williams.
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 06-26-2007
SimonV's Avatar
Wish I never found SN!
 
Join Date: Jul 2006
Location: Brisbane Australia
Posts: 1,997
Thanks: 3
Thanked 4 Times in 4 Posts
Rep Power: 9
SimonV will become famous soon enough
Majorm

Don’t take any notice of mangy Wombat, he eats roots and leaves. It sound expensive or you could say it may save you money. Sounds like you have a buggered thrust bearing when it is turning it would self centre and is quiet when locked the movement of water over the propeller even a folding one will cause it to oscillate indicating a worn or lose bearing. Now doesn’t that not deserve some rep points?
__________________
Simon
Ericson 39B.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

I love my boat
S/V GOODONYA
Brisbane
present location Heading to the Whitesundays

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

DELIVERY SKIPPER
Drinking Rum before 10am makes you a Pirate NOT an alcohlic
Reply With Quote Quick reply to this message Share with Facebook
  #6  
Old 06-26-2007
Member
 
Join Date: Jun 2007
Location: Minnesota
Posts: 44
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
majorm is on a distinguished road
Thanks for the suggestions Simon. I currently have a fixed 3 blade prop, but will likely change for a folding prop after the summer.
Reply With Quote Quick reply to this message Share with Facebook
  #7  
Old 06-26-2007
Here .. Pull this
 
Join Date: Jan 2007
Posts: 2,031
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Sailormann will become famous soon enough
Correct me if I am wrong here (yes it has happened once or twice ) but I thought that the reason we put our diesels into reverse is so that the cutlass bearings/shafts/stuffing boxes don't wear out prematurely.

I don't think that you have those on a saildrive... or do you ???
Reply With Quote Quick reply to this message Share with Facebook
  #8  
Old 06-27-2007
max-on's Avatar
1997 Dehler 33
 
Join Date: Mar 2004
Location: Rhode Island
Posts: 745
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
max-on will become famous soon enough
We have a Yanmar 2GM SD20 (sail-drive), with a two-blade folding prop, the same thing happened to me last week. We usually sail with the gear in neutral. However, a friend was on board and he was at the helm, he put the gear in reverse after we turned the engine off, which I did not notice at first. After a while of sailing I go below only to hear this 'noise', which did not sound good. We determined the gear was in reverse and once put in neutral the noise stopped - quiet as usual.

What was the 'noise'? Is there something I need to address with the engine/transmission/prop?
Reply With Quote Quick reply to this message Share with Facebook
  #9  
Old 06-27-2007
Senior Member
 
Join Date: Jun 2004
Location: Malaysia
Posts: 314
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
haffiman37 is on a distinguished road
Quote:
Originally Posted by max-on
We have a Yanmar 2GM SD20 (sail-drive), with a two-blade folding prop, the same thing happened to me last week. We usually sail with the gear in neutral. However, a friend was on board and he was at the helm, he put the gear in reverse after we turned the engine off, which I did not notice at first. After a while of sailing I go below only to hear this 'noise', which did not sound good. We determined the gear was in reverse and once put in neutral the noise stopped - quiet as usual.

What was the 'noise'? Is there something I need to address with the engine/transmission/prop?
2-blade folding props might, depending on design, have the naughty habbit of flapping the blades together if You lock the gear-box. May give an 'alarming' sound/knock. In general You may let sail-drives trail as they does not have a lubrication problem like most straight-shaft gear-boxes. The only thing is You perhaps should change the prop shaft seal every second year or so, but that is no big deal.
Reply With Quote Quick reply to this message Share with Facebook
  #10  
Old 06-27-2007
max-on's Avatar
1997 Dehler 33
 
Join Date: Mar 2004
Location: Rhode Island
Posts: 745
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
max-on will become famous soon enough
Thanks Haffiman37, that's what I thought, but it is always good to get a second opinion.
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
The Advocate - While sailing yesterday on Long Island Sound aboard the Ticonderoga, . . . (Stamford Advocate) NewsReader News Feeds 1 07-31-2009 08:33 PM
The Advocate - While sailing yesterday on Long Island Sound aboard the Ticonderoga, . . . (Stamford Advocate) NewsReader News Feeds 0 07-26-2006 08:15 AM
Top 10 Sailing Venues Dan Dickison Cruising Articles 0 08-11-2002 09:00 PM
sailing from western LI sound to Block Island jeramar Cruising & Liveaboard Forum 9 07-05-2001 03:04 PM
Sailing Mississippi Sound stretch63 General Discussion (sailing related) 1 06-05-2001 06:13 PM


All times are GMT -4. The time now is 05:48 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.