Re: [bolger] re lead shot as keel weight
On The Question of Ballast-
1) Sealing stainless steel off from the air will make it corroad(stain and rust)
2) Steel sealed in the same maner will alsoover time rust with even more violent results as rust expands as it grows
3) Lead is your best bet---it takes less, it will not cause you problems with corrision, will take up less space for the wieght
daveydimwit <david@...> wrote:
If I do my math right and remember my specific gravities, lead is
about 11.24 and steel is 7.7. If you pack lead shot to a .75 density
- 11.24X.75 = 8.43.
Lead costs a lot more than steel and epoxy is a lot more again.
Somehow I think one could encapsulate a steel ballast in epoxy or even
stainless for a lot less than a lead-epoxy mixture.
I know there are problems with encapsulation but ......
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1) Sealing stainless steel off from the air will make it corroad(stain and rust)
2) Steel sealed in the same maner will alsoover time rust with even more violent results as rust expands as it grows
3) Lead is your best bet---it takes less, it will not cause you problems with corrision, will take up less space for the wieght
daveydimwit <david@...> wrote:
If I do my math right and remember my specific gravities, lead is
about 11.24 and steel is 7.7. If you pack lead shot to a .75 density
- 11.24X.75 = 8.43.
Lead costs a lot more than steel and epoxy is a lot more again.
Somehow I think one could encapsulate a steel ballast in epoxy or even
stainless for a lot less than a lead-epoxy mixture.
I know there are problems with encapsulation but ......
Bolger rules!!!
- no cursing, flaming, trolling, spamming, or flogging dead horses
- stay on topic, stay on thread, punctuate, no 'Ed, thanks, Fred' posts
- Pls add your comments at the TOP, SIGN your posts, and snip away
- Plans: Mr. Philip C. Bolger, P.O. Box 1209, Gloucester, MA, 01930, Fax: (978) 282-1349
- Unsubscribe:bolger-unsubscribe@yahoogroups.com
- Open discussion:bolger_coffee_lounge-subscribe@yahoogroups.com
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---------------------------------
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To visit your group on the web, go to:
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bolger-unsubscribe@yahoogroups.com
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[Non-text portions of this message have been removed]
Actually I installed some further ballast under the floor of my
Navigator. I got several boxes of steel washer punchings, (what causes
the hole in a washer), and cost just a few dollars. They are only
about quarter inch diam., lay flat and tight, and mixed with minimal
epoxy make a very dense slab of ballast. I screwed ss screws partway
into the surrounding framing to give a good key in case of capsize. If
you tap the bottom from underneath, it feels like a bank vault door.
DonB
Navigator. I got several boxes of steel washer punchings, (what causes
the hole in a washer), and cost just a few dollars. They are only
about quarter inch diam., lay flat and tight, and mixed with minimal
epoxy make a very dense slab of ballast. I screwed ss screws partway
into the surrounding framing to give a good key in case of capsize. If
you tap the bottom from underneath, it feels like a bank vault door.
DonB
--- Inbolger@yahoogroups.com, "daveydimwit" <david@c...> wrote:
> If I do my math right and remember my specific gravities, lead is
> about 11.24 and steel is 7.7. If you pack lead shot to a .75 density
> - 11.24X.75 = 8.43.
> Lead costs a lot more than steel and epoxy is a lot more again.
> Somehow I think one could encapsulate a steel ballast in epoxy or even
> stainless for a lot less than a lead-epoxy mixture.
> I know there are problems with encapsulation but ......
If I do my math right and remember my specific gravities, lead is
about 11.24 and steel is 7.7. If you pack lead shot to a .75 density
- 11.24X.75 = 8.43.
Lead costs a lot more than steel and epoxy is a lot more again.
Somehow I think one could encapsulate a steel ballast in epoxy or even
stainless for a lot less than a lead-epoxy mixture.
I know there are problems with encapsulation but ......
about 11.24 and steel is 7.7. If you pack lead shot to a .75 density
- 11.24X.75 = 8.43.
Lead costs a lot more than steel and epoxy is a lot more again.
Somehow I think one could encapsulate a steel ballast in epoxy or even
stainless for a lot less than a lead-epoxy mixture.
I know there are problems with encapsulation but ......