[Alberg30] Faraday's cage lightning protection

[Gordon LACO]

Hello there - 

Lightning is something that I have done a lot of looking into... I don't
like it much.




on 8/21/03 3:11 PM, J Bergquist at j at ship.saic.com wrote:

> Dear List,
> 
> I've asked about this before, and George gave me a very good answer,
> which was that the best way to avoid being struck by lightning is to
> lead an upstanding life.
> 
> What I want to know is does the Alberg 30 mast/rigging form Faraday's cage?
> 
> The answer to this question, I think, lies in answering the question of
> whether or not the conductor must be grounded in order for Faraday's
> cage to be well-formed. Since the mast is deck-stepped, and the keel is
> encapsulated, the A30 does not appear grounded as delivered from the
> factory. However, it would be possible to install an aftermarket ground,
> I would think (though this would doubtless have implications for bonding
> and galvanic corrosion, issues I'd just as soon not think about if I
> don't have to).
> 
> So I'm wondering if the A30 as rigged (ie. ungrounded) provides a
> Faraday's cage type protection from electromagnetic discharge, or is it
> necessary for the conductor(s) to be grounded in order for Faraday's
> cage to be well-formed.
> 
> Having spent a few nights this summer out during thunderstorms, I'd
> personally like to know whether or not I should worry about installing a
> ground this winter.
> 
> Anybody know about this?
> 
> J Bergquist
> #287 Calliope
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 |                This Old Boat by Don Casey                     |
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