Iron Keels Versus Lead Keels - 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 > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 11-30-2007
Junior Member
 
Join Date: Nov 2007
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
twofish81 is on a distinguished road
Lightbulb Iron Keels Versus Lead Keels

Dear all,

Can anyone please advice what are the pro and cons for both Iron Keels and Lead Keels? Besides the highmaintainance cost of iron keels, what are the advantages for iron keels?

As I know iron price is 6 to 8 times lower then lead, and regarding about the environment issue now a days, most of the people is moving away from lead keels to iron keels.

I'd really appreciate the advice from you guys that have so much experience.

thank you


Regards,
Clarence Leong
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 11-30-2007
ASA and PSIA Instructor
 
Join Date: Apr 2000
Posts: 3,497
Thanks: 7
Thanked 19 Times in 19 Posts
Rep Power: 15
sailingfool will become famous soon enough
I think the advantage of iron keels is that they are less expensive for the builder, period. Whether that transaltes into a more affordable value for the buyer is for the buyer to decide.
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 11-30-2007
christyleigh's Avatar
Senior Member
 
Join Date: Dec 2001
Location: North Brookfield, Mass.
Posts: 935
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 14
christyleigh is on a distinguished road
Lead is heavier, doesn't rust, and will deform a bit if you smack into something. A friend of mine hit an underwater rock with his c36 at around 6kts which made a 4" gouge in the keel. No other damage (except him flying across the cockpit) to the boat so it was a simple re-fair that winter. That same hit to a harder iron keel - may have - done more damage to the keel connections and the people on board.
__________________
Stan
'Christy Leigh'
NC 331
Wickford/Narragansett Bay RI
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 11-30-2007
Idiens's Avatar
Larus Marinus
 
Join Date: Jan 2007
Location: Brussels
Posts: 1,756
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Idiens is on a distinguished road
I think it depends a bit on the keel. If it is a long thin foil with a bulb at the end, having a steel foil and a lead bulb might be a good idea. If it is a tandem keel with a bit fin, that the boat can stand on, maybe all steel makes sense. Otherwise lead seems to be the best choice. (Unless you can afford tungsten or depleted uranium).
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 11-30-2007
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
As for lead keels... they're denser than iron keels, so provide more ballast for the same volume. A keel of equal mass and righting moment made of lead will be smaller and have less underwater surface area—resulting in a faster boat. The metal is more malleable, giving in the case of an impact. It is less likely to cause damaging corrosion. Iron expands when it rusts...leading to the breaking of encapsulating fiberglass... etc.

Overall, if you have to have a heavy keel... lead is really a much better material for it.


Idiens-

Osmium is denser than either tungsten or deplete uranium... in fact it is about the only metal that won't float on mercury. Tungsten is about 19.25 gm/cc and uranium is about 19.1 gm/cc—Osmium is 22.61 gm/cc, and not very radioactive.. but it is considerably harder than lead... so not as forgiving. Iridium is a close second to Osmium in density, and both are in the platinum metal family. It is very expensive... with the one stable isotope of osmium going for as much as $25,000 per gram.
__________________
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
  #6  
Old 11-30-2007
Idiens's Avatar
Larus Marinus
 
Join Date: Jan 2007
Location: Brussels
Posts: 1,756
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Idiens is on a distinguished road
I didn't think your tri needed any ballast SD.
Reply With Quote Quick reply to this message Share with Facebook
  #7  
Old 11-30-2007
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
I keep some tungsten and lead aboard... in the form of buckshot and slugs to help repel PWCs... Amazing what damage a good slingshot can do with a .50 caliber Tungsten pellet.
Quote:
Originally Posted by Idiens View Post
I didn't think your tri needed any ballast SD.
__________________
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
  #8  
Old 11-30-2007
Idiens's Avatar
Larus Marinus
 
Join Date: Jan 2007
Location: Brussels
Posts: 1,756
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Idiens is on a distinguished road
Wow! SD! You are even prepared for armour plated PWC!!!
Reply With Quote Quick reply to this message Share with Facebook
  #9  
Old 11-30-2007
Senior Member
 
Join Date: Sep 2006
Location: Scotland
Posts: 2,284
Thanks: 0
Thanked 7 Times in 7 Posts
Rep Power: 9
Rockter will become famous soon enough
My own ship has a big fat lead keel encased in glass fibre.... the ship is a Union 36, with a modified-full keel. Now into her 30th year, the keel is zero maintainence, so far.... no visible corrosion, and no keel bolts!!!!

Cast iron is likely to be a good material too. Despite the association with steel (there is a lot of iron in steel !) cast iron really does have good corrosion resistance (witness raw water cooled Volvo motors... cast iron).
It is a rather brittle material though.
Reply With Quote Quick reply to this message Share with Facebook
  #10  
Old 11-30-2007
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
They have started using carbon fiber and kevlar in the high end PWCs haven't they???
Quote:
Originally Posted by Idiens View Post
Wow! SD! You are even prepared for armour plated PWC!!!
__________________
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
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
Fixed or swing keel, which is better? TimG2 General Discussion (sailing related) 17 07-30-2014 10:23 AM
Full Keel Vs. Fin or Modified Full Keel AjariBonten Sailboat Design and Construction 51 11-16-2013 03:52 AM
Fin Keel or Shoal Keel acmecoyote General Discussion (sailing related) 11 05-06-2011 05:39 PM
Iron v. Lead Keel CBinRI Boat Review and Purchase Forum 16 05-02-2010 01:32 PM
My First Boat...Boat Term Question... Kacper General Discussion (sailing related) 38 09-23-2008 07:52 PM


All times are GMT -4. The time now is 04:48 PM.

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.