My mast is stuffed full of foam? - SailNet Community
 
LinkBack Thread Tools
post #1 of 8 Old 09-17-2011 Thread Starter
Senior Member
 
afrinus's Avatar
 
Join Date: Feb 2011
Posts: 108
Thanks: 3
Thanked 3 Times in 3 Posts
Rep Power: 5
 
My mast is stuffed full of foam?

I recently de-stepped my mast to replace sheaves, lights an running rigging.
Today while pulling the new rigging in, I noticed that at the bottom, the mast is stuffed full of pieces of foam. The stuff has gone completely to pot - when you touch it it turns to dust.
It appears that the stuff is only in the bottom section - maybe 6 feet - of the mast.

Question, what's the purpose, should it be in there, and do I need to replace it?

Thanks for any help

Pete

"Boat-less no more...
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
"
afrinus is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 8 Old 09-17-2011
Senior Member
 
Join Date: Oct 2006
Location: Virginia
Posts: 725
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
It keeps you floating when you turn over.

Really it is to keep wires from rattling around. Just remove and replace if needed

That derelict boat was another dream for somebody else, don't let it be your nightmare and a waste of your life.
badsanta is offline  
Quote Quick Reply Share with Facebook
post #3 of 8 Old 09-18-2011
72 C&C Corvette
 
CorvetteGuy's Avatar
 
Join Date: Jun 2011
Location: PHYC
Posts: 318
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 5
 
I agree with badsanta its for noise surpression for happy sleeps and happy neighbours. Replace with possibly low expantion spray foam. happy nappin
CorvetteGuy is offline  
Quote Quick Reply Share with Facebook
post #4 of 8 Old 09-18-2011
Old as Dirt!
 
svHyLyte's Avatar
 
Join Date: Nov 2008
Location: Tampa Bay Area
Posts: 2,938
Thanks: 15
Thanked 130 Times in 123 Posts
Rep Power: 7
 
Quote:
Originally Posted by afrinus View Post
I recently de-stepped my mast to replace sheaves, lights an running rigging.
Today while pulling the new rigging in, I noticed that at the bottom, the mast is stuffed full of pieces of foam. The stuff has gone completely to pot - when you touch it it turns to dust.
It appears that the stuff is only in the bottom section - maybe 6 feet - of the mast.

Question, what's the purpose, should it be in there, and do I need to replace it?

Thanks for any help

Pete
You have not indicated whether the spar is deck or keel stepped. In some cases, keel stepped masts have had foam injected in the lower portions, to a point somewhat above the partners/boot, in an effort to prevent water making its way into the bilge. Unfortunately, the practice isn't very effective and may create/cause more problems than not. If the mast is, in fact, deck stepped, the foam may be there in an effort to help silence internal wiring or halyards as others have suggested but, being in the bottom section, will not be particularly effective. There are ways to silence internal wiring but injecting foam is a poor idea given that some day someone will have to re-run wiring.

FWIW...

"It is not so much for its beauty that the sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."
svHyLyte is offline  
Quote Quick Reply Share with Facebook
post #5 of 8 Old 09-18-2011 Thread Starter
Senior Member
 
afrinus's Avatar
 
Join Date: Feb 2011
Posts: 108
Thanks: 3
Thanked 3 Times in 3 Posts
Rep Power: 5
 
Thanks for all the replies. The sound proofing makes sense.
My kids came up with what I think is a good idea - I'll run the cables through a few "noodles"......

"Boat-less no more...
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
"
afrinus is offline  
Quote Quick Reply Share with Facebook
post #6 of 8 Old 09-18-2011
Over Hill Sailing Club
 
smurphny's Avatar
 
Join Date: Feb 2009
Location: Adirondacks NY
Posts: 3,576
Thanks: 89
Thanked 107 Times in 104 Posts
Rep Power: 7
 
The main reason for foam inside a mast is to keep it afloat if it gets dropped in the water. Aluminum, having a low specific gravity can be floated pretty easily. Modern foams like polyisocyanurate are "closed cell" foams, not prone to absorption of water but some of the older foams create a problem of saturation and excessive weight exactly where you don't want it. I have thought some strips of foam just slid inside the mast might be a good idea. If you get demasted (dread the thought) it would be nice to have the option of retrieving the mast if it went over to use for some sort of jury rig.
smurphny is offline  
Quote Quick Reply Share with Facebook
post #7 of 8 Old 09-18-2011
Senior Member
 
Join Date: Jun 2004
Location: West Michigan
Posts: 515
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 12
 
Quote:
Originally Posted by afrinus View Post
Thanks for all the replies. The sound proofing makes sense.
My kids came up with what I think is a good idea - I'll run the cables through a few "noodles"......
There are tons of uses for noodles in a boat, I used them stuffed under the gunnel of an old dingy as flotation. Also cut 6" lengths from them, run wire through and use it to hold the wire in areas where it's hard to fasten it.
Also work well as feet for a temporary work board to keep from scratching surfaces during project work.
And, if you need it, slit the side and wrap around a board, makes a nice floating table with fiddles.
merc2dogs is offline  
Quote Quick Reply Share with Facebook
post #8 of 8 Old 09-19-2011
Reward for lost Kraken!
 
hellosailor's Avatar
 
Join Date: Apr 2006
Posts: 11,568
Thanks: 6
Thanked 137 Times in 134 Posts
Rep Power: 11
   
Someone stuffed foam rubber up the mast to keep the halyards and wires from slapping. Cheap foam rubber is blown from a chemical "pancake batter" and the cheap stuff breaks down from chemical burns in a couple of years. So what you've got there is just garbage, serves no purpose, clean it out and if the halyards are slapping, put in something better.

Floatation uses closed call foam, that stuff was open cell foam.
hellosailor is offline  
Quote Quick Reply 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:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Full Keel Vs. Fin or Modified Full Keel AjariBonten Sailboat Design and Construction 51 11-16-2013 02:52 AM
Removing Mast Foam Michael K Gear & Maintenance 3 04-07-2011 09:12 AM
how much foam in a Mac or Venture 25? malcolmwill MacGregor 19 01-17-2009 08:05 PM
drycleaning foam? marcusn Gear & Maintenance 7 03-06-2008 11:27 AM
PVC foam core rbh1515 Boat Review and Purchase Forum 2 01-08-2004 09:35 AM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome