RE: [Paddlewise] Anyone understand lightning?

From: Rafael Mier Maza <sildriel_at_ciateq.net.mx>
Date: Fri, 23 Aug 2002 13:59:55 -0500
At 08:38 p.m. 23/08/02 +1000, you wrote:
>The other was when due to bad judgement I found myself in a kayak caught in
>open water in a major storm. For about 300 meters every time I touched the
>water with the right blade I got a tiny shock between my right hand and the
>paddle. I'm guessing it was electricity I don't really know, but it
>certainly felt like it. Got to shore in record time. If only I could paddle
>that fast normally.



Hi Peter,

I work in high voltage lines and substations covering the porcelain with 
insulating silicone coating while energized. I think, I can try to explain 
what was going on with the tiny shock you felt.  The air was charged 
electrically,so there was some voltage difference between your body due to 
induction in the air, and the water. The insulation maintaining that 
difference was the kayak material. Every time you touched the water with 
the paddle, current did flow through the shaft  to bring your body to the 
water potential, therefore you felt the discharge. After the paddle left 
the water you charged yourself again due to voltage induced in the air, and 
so on.

We feel that  same thing everytime we let go of the metallic surface of the 
tower, and since our booths are insulated, we float (electrically speaking) 
and attain the induced voltage in air. When we hold the tower again we feel 
the small shock and we can even see the little spark light, from our 
fingers or through the clothes, if we lean against the tower steel elements.

The bad thing about it (if  I am right), is that the presence of 
clouds  with high voltage kept the air where you were paddling electrically 
stressed, and if any section of air would brake and ionize the discharge 
might have followed. How  much  more stress was needed is hard to know, but 
certainly conditions were not safe, and it was good to get out as soon as 
possible, or before.

Why did it happen only with the right side?  I would like to make a guess 
that the positive high voltage source was high on your left side, so your 
left side was negatively charged and your right side positively charged. 
When you touched the water on the right side, electrons would flow to 
neutralize the positive charge.

maybe somebody can complement this or suggest another explanation.

Best Regards,

Rafael
el cayuco chief
Mexico

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Received on Fri Aug 23 2002 - 12:01:11 PDT

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