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[TowerTalk] Fwd: Static Discharge Porcupines?

To: towertalk@contesting.com
Subject: [TowerTalk] Fwd: Static Discharge Porcupines?
From: Hans Hammarquist via TowerTalk <towertalk@contesting.com>
Reply-to: Hans Hammarquist <hanslg@aol.com>
Date: Wed, 12 Aug 2015 11:47:56 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
It appears to me that there are no ways to predict where the lightning will 
strike. Yes, you know that it will be somewhere below a the thunder storm 
passing by but the strikes seem to ignore high structures from not that high.


I once (don't remember from where. Probably Yahoo or U-tube or similar) saw a 
high speed video of the development of a lightning strike. You could see how a 
"network" developed coming from the cloud. It appeared as if a "rod" stretch 
out from the cloud, divided in two. Each of these, two branches divided in two 
and it continued until one branch hit an object. When this happened a lightning 
followed the branches up to the cloud. The first development was relatively 
"slow", a couple of mS. The heavy current strike was fast, so fast so you 
couldn't really tell what direction it went. It was fascinating.


(I have had three known strikes in my house. The first one burnt the house 
down. The second and third made marks in my lightning protection. The third 
also blowout all my surge protectors. The house is surrounded by 80 - 100 feet 
tall trees in all directions. Figures!)


Hans - N2JFS



-----Original Message-----
From: Chuck Dietz <w5prchuck@gmail.com>
To: sawyered <sawyered@earthlink.net>
Cc: towertalk <towertalk@contesting.com>
Sent: Wed, Aug 12, 2015 10:01 am
Subject: Re: [TowerTalk] Static Discharge Porcupines?


Interestingly enough, when I had a 130 foot tower on the east side of
Galveston
Bay on a promontory out in the salt water, I was the highest
structure for
miles.  I expected to have frequent strikes, but had none
that I know of over a
several year period.  The lightning favored the
highly conductive salt water
over the tower.

Chuck W5PR

o/towertalk

 
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