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Go Back   SailNet Community > On Board > Gear & Maintenance > Iron Keels Versus Lead Keels
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Thread: Iron Keels Versus Lead Keels Reply to Thread
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Topic Review (Newest First)
12-02-2007 02:58 PM
sailingdog
Quote:
Originally Posted by HoffaLives View Post
noway hose. Hg has a density of 13.6 g.cm-3, so those metals are denser and will sink. the way your boat is less dense than water. and so it floats. apparently we may have osmium in our compass bearings (woopee).

Very true... and it's about the fourth or fifth time I've said that...but no one ever checks... Good to see you're on your toes.
12-02-2007 03:57 AM
HoffaLives
Quote:
Originally Posted by sailingdog View Post
Idiens-

Osmium is denser than either tungsten or deplete uranium... in fact it is about the only metal that won't float on mercury.... with the one stable isotope of osmium going for as much as $25,000 per gram.
noway hose. Hg has a density of 13.6 g.cm-3, so those metals are denser and will sink. the way your boat is less dense than water. and so it floats. apparently we may have osmium in our compass bearings (woopee).
12-02-2007 12:50 AM
sailingdog Doesn't really poison the fishies if it is intact and on the boat.
Quote:
Originally Posted by Sailormann View Post
Iron rusts and falls off. Lead warps and poisons the fish. Me I'm more of a fish-killer than a rust afficionado.
12-02-2007 12:45 AM
Sailormann Iron rusts and falls off. Lead warps and poisons the fish. Me I'm more of a fish-killer than a rust afficionado.
11-30-2007 02:31 PM
CBinRI Here's a similar thread from some time back:

http://www.sailnet.com/forums/boat-review-purchase-forum/16302-iron-v-lead-keel.html
11-30-2007 02:04 PM
sailingdog 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!!!
11-30-2007 01:32 PM
Rockter 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.
11-30-2007 12:44 PM
Idiens Wow! SD! You are even prepared for armour plated PWC!!!
11-30-2007 11:27 AM
sailingdog 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.
11-30-2007 11:02 AM
Idiens I didn't think your tri needed any ballast SD.
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