Author Topic: Bulb material Antimon lead/ Calcium  (Read 2175 times)

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Offline Roberto

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Bulb material Antimon lead/ Calcium
« on: January 04, 2007, 13:57:49 PM »
For those of you who subscribe, there's a good article on Tom Braidwood's Mini campaign in the Offshore section of the Daily Sail.

What's the deal with calcium lead bulb vs. anotminium lead?
« Last Edit: August 04, 2007, 12:27:39 PM by Leov »

Offline Tingle

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Re: Tom Braidwood
« Reply #1 on: January 04, 2007, 14:02:20 PM »
My guess is it has a higher density (same argument for tungston bulbs over lead) but is still lead so comes under the class rules.

He has a full nomex/prepreg boat and has even gone as far to have the bulb milled, it sounds like a nice boat!

Offline NicoG

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Re: Tom Braidwood
« Reply #2 on: January 04, 2007, 15:46:58 PM »
anotminium lead = a not minimum lead ?

Offline Kristian

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Re: Tom Braidwood
« Reply #3 on: January 04, 2007, 21:55:36 PM »
anotminium lead = a not minimum lead ?

leo, they add small ammount of antimon (about 2%) into the pure lead to make the alloy harder and to prevent flakes of lead peeling off .
Calcium? too far away from my mech. eng education to remember why this should be better

Offline NicoG

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Re: Tom Braidwood
« Reply #4 on: January 04, 2007, 22:10:41 PM »
Yep i know, but i had to laugh about it.. not sure if Tom did mean it as a joke,
Or did the DS reporter had no clue :)
I know now AlfaRomeo Maxi had a calcium lead bulb too.