lightening

"simon" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Imagine the scenario, inside a tent, heavy rain outside
with water pouring down the sides of the tent. A couple of
external metal hoops support the tent in a dome shape. The
top of the tent gets hit by an average strengh bolt of
lightening but the occupant is lying inside, flat. Does
the water and the hoops turn the tent into a Faraday cage?

quite possibly.

I wouldn't like to test out the theory though ;-)

"simon" <[email hidden]> schreef in bericht
"]news:[email hidden]...

Quoted message said:

Imagine the scenario, inside a tent, heavy rain outside
with water pouring down the sides of the tent. A couple of
external metal hoops support the tent in a dome shape. The
top of the tent gets hit by an average strengh bolt of
lightening but the occupant is lying inside, flat. Does
the water and the hoops turn the tent into a Faraday cage?

No, you get fried inside because the ground around the hit
gets electrified also (the same happens when a tree gets hit
by lightning) No TR I'm afraid
:-(

Theo

I should have added the question "would it be be prudent to
collapse the tent in those circumstances?"

Paul Blake <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

"simon" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Imagine the scenario, inside a tent, heavy rain outside
with water

pouring

Quoted message said:

Quoted message said:

down the sides of the tent. A couple of external metal
hoops support

the

Quoted message said:

Quoted message said:

tent in a dome shape. The top of the tent gets hit by an
average strengh bolt of lightening but the occupant is
lying inside, flat. Does the

water

Quoted message said:

Quoted message said:

and the hoops turn the tent into a Faraday cage?

quite possibly.

I wouldn't like to test out the theory though ;-)

* Paul Blake <[email hidden]> deigned to grace
uk.rec.walking
* with their presence by declaiming:

Quoted message said:

"simon" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Imagine the scenario, inside a tent, heavy rain outside
with water pouring down the sides of the tent. A couple
of external metal hoops support the tent in a dome
shape. The top of the tent gets hit by an average
strengh bolt of lightening but the occupant is lying
inside, flat. Does the water and the hoops turn the tent
into a Faraday cage?

quite possibly.

I wouldn't like to test out the theory though ;-)

But don't forget a TR if you do!

Regards: Jim Ford

"theo" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

"simon" <[email hidden]> schreef in bericht
"]news:[email hidden]...

Quoted message said:

Imagine the scenario, inside a tent, heavy rain outside
with water pouring down the sides of the tent. A couple
of external metal hoops support the tent in a dome
shape. The top of the tent gets hit by an average
strengh bolt of lightening but the occupant is lying
inside, flat. Does the water and the hoops turn the tent
into a Faraday cage?

No it doesn't, but since a Faraday cage will not shield you
from a lightning strike (although it will ruin your radio
reception :-) that doesn't make much difference.

Quoted message said:

No, you get fried inside because the ground around the hit
gets electrified also (the same happens when a tree gets
hit by lightning) No TR I'm afraid
:-(

Bang on. Or should that be just: BANG!
--
Mark South Citizen of the World, Denizen of the Net <<Tiens!
Ce poulet a une grenade!

"Mark South" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

"theo" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

No it doesn't, but since a Faraday cage will not shield
you from a lightning strike (although it will ruin your
radio reception :-) that doesn't make much difference.

So what was it that I saw on a TV programme from high
voltage tests labs ?

--
M Stewart Milton Keynes, UK
www.megalith.freeserve.co.uk/oddimage.htm
myweb.tiscali.co.ukms1938Open ↗

* Malcolm Stewart <[email hidden]>
deigned to grace
* uk.rec.walking with their presence by declaiming:

Quoted message said:

"Mark South" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

"theo" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

No it doesn't, but since a Faraday cage will not shield
you from a lightning strike (although it will ruin your
radio reception :-) that doesn't make much difference.

So what was it that I saw on a TV programme from high
voltage tests labs ?

Probably Adam Hart_Davis in a Faraday suit, being winched up
to a high voltage source (250,000 volts IIRC) and drawing
metre long 'lightning' from
it. Maybe in time a Faraday Suit will become as essential a
piece of gear for hillwalking as a waterproof jacket!

Regards: Jim Ford

Mark South said:

"theo" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Quoted message said:

"simon" <[email hidden]> schreef in bericht
"]news:[email hidden]...

Quoted message said:

Quoted message said:

Quoted message said:

Imagine the scenario, inside a tent, heavy rain outside
with water pouring down the sides of the tent. A couple
of external metal hoops support the tent in a dome
shape. The top of the tent gets hit by an average
strengh bolt of lightening but the occupant is lying
inside, flat. Does the water and the hoops turn the
tent into a Faraday cage?

Quoted message said:

No it doesn't, but since a Faraday cage will not shield you
from a lightning strike (although it will ruin your radio
reception :-) that doesn't make much difference.

Quoted message said:

Quoted message said:

No, you get fried inside because the ground around the
hit gets electrified also (the same happens when a tree
gets hit by lightning) No TR I'm afraid
:-(

Quoted message said:

Bang on. Or should that be just: BANG!

Unless of course you happen to be lying safely on your full-
sized Thermarest, in which case the most serious danger is
probably being hit by some drops of molten aluminium.

--
Chris Malcolm [email hidden] +44 (0)131 651 3445 DoD #205
IPAB, Informatics, JCMB, King's Buildings, Edinburgh, EH9 3JZ, UK
["]http://www.dai.ed.ac.uk/homes/cam/]

Mark South said:

"theo" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Quoted message said:

"simon" <[email hidden]> schreef in bericht
"]news:[email hidden]...

Quoted message said:

Quoted message said:

Quoted message said:

Imagine the scenario, inside a tent, heavy rain outside
with water pouring down the sides of the tent. A couple
of external metal hoops support the tent in a dome
shape. The top of the tent gets hit by an average
strengh bolt of lightening but the occupant is lying
inside, flat. Does the water and the hoops turn the
tent into a Faraday cage?

Quoted message said:

No it doesn't, but since a Faraday cage will not shield you
from a lightning strike (although it will ruin your radio
reception :-) that doesn't make much difference.

Quoted message said:

Quoted message said:

No, you get fried inside because the ground around the
hit gets electrified also (the same happens when a tree
gets hit by lightning) No TR I'm afraid
:-(

Quoted message said:

Bang on. Or should that be just: BANG!

Unless of course you happen to be lying safely on your full-
sized Thermarest, in which case the most serious danger is
probably being hit by some drops of molten aluminium.

--
Chris Malcolm [email hidden] +44 (0)131 651 3445 DoD #205
IPAB, Informatics, JCMB, King's Buildings, Edinburgh, EH9 3JZ, UK
["]http://www.dai.ed.ac.uk/homes/cam/]

"Chris Malcolm" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Mark South said:

"theo" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Quoted message said:

"simon" <[email hidden]> schreef in bericht
"]news:[email hidden]...

Quoted message said:

Quoted message said:

> Imagine the scenario, inside a tent, heavy rain
> outside with water

pouring

Quoted message said:

Quoted message said:

Quoted message said:

> down the sides of the tent. A couple of external
> metal hoops support the tent in a dome shape. The top
> of the tent gets hit by an average strengh bolt of
> lightening but the occupant is lying inside, flat.
> Does the water and the hoops turn the tent into a
> Faraday cage?

Quoted message said:

No it doesn't, but since a Faraday cage will not shield
you from a lightning strike (although it will ruin your
radio reception :-) that doesn't make much difference.

Quoted message said:

Quoted message said:

No, you get fried inside because the ground around the
hit gets electrified also (the same happens when a tree
gets hit by lightning) No TR I'm afraid
:-(

Quoted message said:

Bang on. Or should that be just: BANG!

Unless of course you happen to be lying safely on your full-
sized Thermarest, in which case the most serious danger is
probably being hit by some drops of molten aluminium.

No, you'll find lightning doesn't care much about Ohm's law.

Mark South said:

No it doesn't, but since a Faraday cage will not shield you
from a lightning strike

Some pseudo-science TV show said that it did. Or rather,
that the reason you were safe in a car was nothing to do
with rubber tyres as per popular perception, but because it
acted as a Faraday cage.

It was on the telly so it must be true, mustn't it?

"Simon Caldwell" <[email hidden]> wrote

Quoted message said:

Some pseudo-science TV show said that it did. Or rather,
that the reason you were safe in a car was nothing to do
with rubber tyres as per popular perception, but because
it acted as a Faraday cage.

It was on the telly so it must be true, mustn't it?

There was also an interesting thing on the telly a long time
ago about the precautions people take whilst working on live
overhead power lines. Can't remember the details, I think
they were wearing weird suits and doing it in a cage
suspended from a helicopter but I could be talking rubbish.

Simon Caldwell said:

Quoted message said:

No it doesn't, but since a Faraday cage will not shield
you from a lightning strike

Some pseudo-science TV show said that it did. Or rather,
that the reason you were safe in a car was nothing to do
with rubber tyres as per popular perception, but because
it acted as a Faraday cage.

It was on the telly so it must be true, mustn't it?

It's in books too so it's not just telly science.

Paul
--
wilderness-wales.co.ukwilderness-wales.co.ukOpen ↗
wildwales.fsnet.co.ukwildwales.fsnet.co.ukOpen ↗
photosig.comuserphotosOpen ↗

"Simon Caldwell" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Mark South said:

No it doesn't, but since a Faraday cage will not shield
you from a

lightning

Quoted message said:

Quoted message said:

strike

Some pseudo-science TV show said that it did. Or rather,
that the reason you were safe in a car was nothing to do
with rubber tyres as per popular perception, but because
it acted as a Faraday cage.

It was on the telly so it must be true, mustn't it?

Same applies to aircraft. Apparently its not uncommon for
aircraft (in flight!) to be struck, but the lightening
travels around the aeroplane and discharges from
beneath....or something like that!

Regards, Paul www.lakelandwalker.co.uk - My Lake District
walking site

Paul Rose Middlesbrough, England, U.K.

"Simon Caldwell" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Mark South said:

No it doesn't, but since a Faraday cage will not shield
you from a

lightning

Quoted message said:

Quoted message said:

strike

Some pseudo-science TV show said that it did. Or rather,
that the reason you were safe in a car was nothing to do
with rubber tyres as per popular perception, but because
it acted as a Faraday cage.

It was on the telly so it must be true, mustn't it?

Same applies to aircraft. Apparently its not uncommon for
aircraft (in flight!) to be struck, but the lightening
travels around the aeroplane and discharges from
beneath....or something like that!

Regards, Paul www.lakelandwalker.co.uk - My Lake District
walking site

Paul Rose Middlesbrough, England, U.K.

Paul Saunders <[email hidden]> wrote

Quoted message said:

Simon Caldwell said:

Quoted message said:

No it doesn't, but since a Faraday cage will not shield
you from a lightning strike

Some pseudo-science TV show said that it did. Or rather,
that the reason you were safe in a car was nothing to do
with rubber tyres as per popular perception, but because
it acted as a Faraday cage.

It was on the telly so it must be true, mustn't it?

It's in books too so it's not just telly science.

Not only books - a bloke I met in a pub told me about it.

I must admit to feeling better in a car than out in the open
during a violent electrical storm, and one contributing
reason was that the rain is often coming down like stair
rods. :-) It happened to us recently, and visibility was so
bad that I pulled into a lay-by and let those with more
urgent journeys carry on.
--
Gordon

AndyP <[email hidden]> wrote

Quoted message said:

"Gordon" <[email hidden]> wrote

Quoted message said:

I must admit to feeling better in a car than out in the
open during a violent electrical storm, and one
contributing reason was that the rain is often coming
down like stair rods. :-) It happened to us recently, and
visibility was so bad that I pulled into a lay-by and let
those with more urgent journeys carry on.

Try it on a bike. I got caught in a really horrendous
downpour once. Couldn't see a thing and decided maybe it
was a good idea to stop when I realised I was on the wrong
side of the road heading into a ditch.

Push-bike or motorbike? I owned one for 6 months whilst
doing National Service, and it was then that I discovered
that rain is made up of thousands of sharp needles. ;-)
--
Gordon

"Simon Caldwell" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Mark South said:

No it doesn't, but since a Faraday cage will not shield
you from a lightning strike

Some pseudo-science TV show said that it did. Or rather,
that the reason you were safe in a car was nothing to do
with rubber tyres as per popular perception, but because
it acted as a Faraday cage.

It was on the telly so it must be true, mustn't it?

I hope that you were smiling as you wrote that!!

A metal box (such as a car) can protect from a lightning
strike. This is due to the skin effect, which causes the
charge to flow over the outside layer of the metal box. This
is different from (ie, not the same as) the Faraday effect.

There is nothing much that will insulate you from lightning
since most strikes are at the order of megavolts. Only air,
and a lot of it, is a poor enough conductor to do the job.
--
"To live in San Francisco and just not care that there are
naked triathletes running across your lawn, that's just a
waste of exhibitionism."
- Kibo

"Paul Rose" <[email hidden]> wrote in message
news:Onwqc.13136$7S2.7281@newsfe1-win...

Quoted message said:

Same applies to aircraft. Apparently its not uncommon for
aircraft (in flight!) to be struck, but the lightning
travels around the aeroplane and discharges from
beneath....or something like that!

Regards, Paul www.lakelandwalker.co.uk - My Lake District
walking site

Paul Rose Middlesbrough, England, U.K.

... and there are conductive strips on the cockpit windows
and radomes so as to stop the lightning discharge damaging
the aircraft.
--
M Stewart Milton Keynes, UK
www.megalith.freeserve.co.uk/oddimage.htm
myweb.tiscali.co.ukms1938Open ↗