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blueboy View Drop Down
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Posts: 512 		Post Options Post Options   Quote blueboy Quote  Post ReplyReply Direct Link To This Post Topic: lightning
    Posted: 23 Oct 13 at 7:11pm
I was sailing at Bala once. A huge storm is rumbling up the lake towards us. Surely the race officer is going to cancel? Apparently not. Well, we go for discretion anyway and head ashore, unsure if we are being prudent or wusses.

A dinghy was hit and a hole a couple of inches in diameter was blown out of their transom. No other damage to crew or kit. Not a great decision to start the race, IMO. I wonder if they mentioned that incident when they sold the dinghy on.


Edited by blueboy - 23 Oct 13 at 7:13pm
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Andymac View Drop Down
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Posts: 852 		Post Options Post Options   Quote Andymac Quote  Post ReplyReply Direct Link To This Post Posted: 23 Oct 13 at 6:16pm
Originally posted by iGRF


And let nobody tell you lightning doesn't strike twice.. I've been zapped twice


OK, own up what have you done to upset him!
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Medway Maniac View Drop Down
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Posts: 2788 		Post Options Post Options   Quote Medway Maniac Quote  Post ReplyReply Direct Link To This Post Posted: 21 Oct 13 at 9:54am
Originally posted by iGRF

 I've been zapped twice, once up at Grafham in 1980 ish and again a couple of years back sailing at Hythe.

This may explain certain mystery theories...

Sorry. just couldn't resist that comment.
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iGRF View Drop Down
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Posts: 6499 		Post Options Post Options   Quote iGRF Quote  Post ReplyReply Direct Link To This Post Posted: 21 Oct 13 at 8:34am
Originally posted by hobbiteater

iGRF
Rubber = insulator
so cant act as a
Faraday cage = <span style="font-family: sans-serif; font-size: 12.727272033691406px; line-height: 19.190340042114258px;">A </span><span style="font-family: sans-serif; font-size: 12.727272033691406px; line-height: 19.190340042114258px;">Faraday cage</span><span style="font-family: sans-serif; font-size: 12.727272033691406px; line-height: 19.190340042114258px;"> is an enclosure formed by conducting material </span><span style="font-family: sans-serif; font-size: 12.727272033691406px; line-height: 19.190340042114258px;">or by a mesh of such material</span>


It travels through the surface water on your suit, just pray you're wet at the time and or it's raining.
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hobbiteater View Drop Down
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Posts: 107 		Post Options Post Options   Quote hobbiteater Quote  Post ReplyReply Direct Link To This Post Posted: 21 Oct 13 at 8:30am
iGRF

Rubber = insulator
so cant act as a
Faraday cage = A Faraday cage is an enclosure formed by conducting material or by a mesh of such material
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sargesail View Drop Down
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Posts: 1459 		Post Options Post Options   Quote sargesail Quote  Post ReplyReply Direct Link To This Post Posted: 21 Oct 13 at 7:28am
Originally posted by iGRF

The same as what happens when a windsurfer gets hit by lightning, sparks fly all over you like Luke Skywalker being zapped by the evil emperor, your glasses fly off into the water in a shower of sparks and you get blown into the water.

But wearing a wetsuit with rubber boots you are protected by the Faradays cage effect, it goes round you rather than through you.

You still get stunned though.

And let nobody tell you lightning doesn't strike twice.. I've been zapped twice, once up at Grafham in 1980 ish and again a couple of years back sailing at Hythe.

And I thought lightning took the shortest path to earth.... Wink
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alstorer View Drop Down
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Posts: 2899 		Post Options Post Options   Quote alstorer Quote  Post ReplyReply Direct Link To This Post Posted: 21 Oct 13 at 6:53am
Originally posted by Quagers

As was said in Cowes today as a storm rolled through, anything will conduct if you put enough power through it.
Just because it will "conduct" doesn't mean that it won't rapidly heat, burn and blow apart.

Problem is that whilst carbon fibres may be conductive, the resin fully coating them and binding them together isn't. I've seen what happens to panels made of basic carbon/epoxy that are hit by simulated lightning. It isn't pretty.
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iGRF View Drop Down
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Posts: 6499 		Post Options Post Options   Quote iGRF Quote  Post ReplyReply Direct Link To This Post Posted: 21 Oct 13 at 12:01am
The same as what happens when a windsurfer gets hit by lightning, sparks fly all over you like Luke Skywalker being zapped by the evil emperor, your glasses fly off into the water in a shower of sparks and you get blown into the water.

But wearing a wetsuit with rubber boots you are protected by the Faradays cage effect, it goes round you rather than through you.

You still get stunned though.

And let nobody tell you lightning doesn't strike twice.. I've been zapped twice, once up at Grafham in 1980 ish and again a couple of years back sailing at Hythe.

Edited by iGRF - 21 Oct 13 at 12:02am
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JimC View Drop Down
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Posts: 6661 		Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 13 at 9:46pm
If you're in the dinghy I believe you may well get away with it. I understand the really bad scenario is to be in the water when there's a strike nearby, because you conduct electricity better than the water. So whatever else you do, don't jump in the water for fear of the boat being struck.
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Quagers View Drop Down
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Posts: 279 		Post Options Post Options   Quote Quagers Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 13 at 9:31pm
As was said in Cowes today as a storm rolled through, anything will conduct if you put enough power through it.
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