Thunder & Ligtning

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Tim Hall

Guest
Location
Crawley
Think of us poor buggers on 23mm tyres :laugh:
Ah, but you'll be lower down, so ever so slightly safer.
 

jonny jeez

Legendary Member
Seeing as the lightning bolt has just passed through however many thousand(?) feet of air, do you think 28mm of rubber is going to make an awful lot of difference?
Possibly. You hear stories of folk wearing wellies being protected from the effects...an insulator is an insulator at the end of the day and in this instance its wouldn't be there to "stop" the conduction, rather make it look for an alternative target...like a tall chap stood next to you with no shoes on
 

Donger

Convoi Exceptionnel
Location
Quedgeley, Glos.
In the ordinarily course of thing being struck by lightning on a bicycle is pretty rare - but having sat and watched a fair few alpine thunderstorms where the lightning was striking less than a hundred metres from where I was cowering then it can be just a little intimidating and shouldn't be taken lightly
Ditto. Got caught 9 miles from home in the Alps once and did a dash for it. Felt like an artillery barrage, and I was riding a steel bike. Nowhere to shelter. I now do my mountain rides in the early morning before the heat of the day builds up. Really don't know what I'd do if i was up a mountain when a storm struck.
 

raleighnut

Legendary Member
Ditto. Got caught 9 miles from home in the Alps once and did a dash for it. Felt like an artillery barrage, and I was riding a steel bike. Nowhere to shelter. I now do my mountain rides in the early morning before the heat of the day builds up. Really don't know what I'd do if i was up a mountain when a storm struck.
You do realise Carbon Fibre is an excellent conductor of electricity. :eek:
 

Tim Hall

Guest
Location
Crawley
Possibly. You hear stories of folk wearing wellies being protected from the effects...an insulator is an insulator at the end of the day and in this instance its wouldn't be there to "stop" the conduction, rather make it look for an alternative target...like a tall chap stood next to you with no shoes on
Remember the Hitch Hiker's Guide to the Galaxy?

MISTER PROSSER:
Have you any idea how much damage that bulldozer would suffer if I just let it roll straight over you?

ARTHUR DENT:
How much?

MISTER PROSSER:
None at all!
Now substitute
How much effect will 28mm of rubber have against a several hundred thousand volt lightning strike
for the first sentence.
 

Gravity Aided

Legendary Member
Location
Land of Lincoln
Seeing as the lightning bolt has just passed through however many thousand(?) feet of air, do you think 28mm of rubber is going to make an awful lot of difference?
The reason for this belief is to do with cars. Rubber doesn't insulate you in this case. The automobile acts as a Faraday Cage, allowing the lightning to be conducted around you, following the metal encircling you to ground. A thundercloud has many areas within it of positive and negative charge. These charges connect as the ground sends up streamers of positive charge, hence the feeling of hair standing on end near a lightning strike.
 

Gravity Aided

Legendary Member
Location
Land of Lincoln
Possibly. You hear stories of folk wearing wellies being protected from the effects...an insulator is an insulator at the end of the day and in this instance its wouldn't be there to "stop" the conduction, rather make it look for an alternative target...like a tall chap stood next to you with no shoes on
I've also seen it blow holes in people's shoes. Depends on the lightning, and where it hit, but a direct contact would be quite a negative outcome.
 

Globalti

Legendary Member
FWIW if you really are caught out in the open the best advice is to stay out of caves and depressions in the ground because lightning will track along wet ground and may go through you on the way. Trees obviously; I've seen an oak tree that was struck and the lightning boiled the sap and blew the bark off leaving a naked tree. If you crouch down on the ground, try to have only your feet actually on the ground as lightning could also track along, up your arms and down your legs. Don't throw away your bike or ice axe, they make no difference.

My sister got struck in a tent in the bottom of a valley in Andorra; the lightning (or a small branch of it) came down one tent pole, jumped through the frame of a camp bed on which her BF's child was lying, through a big tin of Brillo pads, which were fused into one smoking mass, and then into the other tent pole and to Earth.
 
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