Nitrogen shock

up...

I think I meant the pressure and temperature goes down and volume
goes up.

Point being, boyle's law doesn't mean what he thought it meant.

 

Me too. I've played around enough with liquid nitrogen and liquid
helium[2] to know what they can do. Gas, even at a high pressure, won't have
anywhere near the effect of liquid[1], so I doubt it's frostbite.

[1] Did get a slightly nasty burn from the gas pulling a stopper out of
a nearly-empty LN2 dewar once, but the gas was still at -196 so it had
a head start over a pressurised can at room temperature.

[2] LHe is a bit weird when it burns you. LN2 first turns the skin red,
and at higher applications causes blisters. An LHe burn is invisible once
the ice melts; seven days later a dry blister forms and the skin falls
off!

--
Ivan Reid, School of Engineering & Design, _____________ CMS Collaboration,
Brunel University. Ivan.Reid@[brunel.ac.uk|cern.ch] Room 40-1-B12, CERN
GSX600F, RG250WD "You Porsche. Me pass!" DoD #484 JKLO#003, 005
WP7# 3000 LC Unit #2368 (tinlc) UKMC#00009 BOTAFOT#16 UKRMMA#7 (Hon)
KotPT -- "for stupidity above and beyond the call of duty".

 

Why? It doesn't take long to get a nasty dose of frostbite and he'd
have probably been so shocked that he sat there watching his finger
die. The extreme cold would have taken him by surprise he wouldn't
have been aware of the potential consequences when he started on his
mission.

I've lost fingernails to frostbite after coming out of a mineshaft in
Derbyshire when we'd been caving and it didn't actually hurt in the
slightest bit. I knew it was going to be a bit grim when the shaft was
almost plugged by snow about 20' from the surface but I carried on
knocking the snow out of the way until I popped my head out into a
maelstrom of snow. It took about 20 minutes to haul the kit up and for
my mate to climb the ropes but by then the ropes had frozen into
something resembling hawsers, my harnesses had frozen solid, the
t-shirt I had on under a wetsuit was frozen and I'd had my fingers
stick to a steel cover that needed fitting over the mineshaft.

Kids do daft things and it's a tough lesson he's had to learn. I've
done myself all sorts of damage over the years through making stupid
mistakes and others will do the same as long as the opportunity
arises. It's a hard lesson but a lot of us here have been stupid and
probably don't even regret their actions.

 

Yeah, like we're all shit hot when it comes to assessing different
situations and making the right call. At least he'd got the get up and
go to try and fix the bike himself rather than either leaving it on
the floor or asking someone else to do the job for him.

 

Yeah, that's Paddy. Once he has the floor covered in bits, he has to
get up and go to my mate and ask him to reassemble it for him.

Nah, I do him a disservice. He's been assisting his old man in the
business of lawnmower and chainsaw (or anything fiddly, with a little
motor) servicing and repair since we was about twelve. He has a fair
amount of nous, but I wouldn't like to be in the same forest when he's
dropping a tree, for example.

The time he ran up a chainsaw that was a difficult hot starter comes to
mind - he had to get it hot first, right? So he Ramboed it into life
and put it on their Workmate in the garden, to warm up. It would have
been a good idea to clamp it, as was usual practice - or at least keep
an eye on it. No, he went off for a cuppa. Next door.

He'd probably have got away with it if he'd released the choke - but by
the time he heard the howl, it had revved up, hit the deck, taken
chunks out of the Workmate, the shed door and the washing-line post.
Running in to grab it, he lost chunks of trainer, jeans leg and jacket
sleeve (and assorted bits of skin and flesh) before he could get it
under control.

He wasn't popular with either parent for some time.

 

<hangs head in shame>

 

Reggie Baker who lived down the road from me when I were a touch older
than nowt burra lad in short keks. I don't know why but either as a dare
or to prove how hard he was he chucked a half brick up in the air and
headed it. Him becoming a heap on the floor was preceded by the statement
"is that my blood?" He wasn't allowed out to play for a week and it was
months before his mum did anything other than set the dogs on us if we
even went near their place. The bald spot where they shaved him for the
stitches made him something of a hero with hero worshippers of all sexes
but we weren't really interested much in that sort of thing as how the
scabs were flaking.

..

 

I remember YTC doing the same thing, but he put a different spin on it.

 

*waves*

And as for seatbelt pre-tensioners....

--
Catman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21 COSOC#3
Tyger, Tyger Burning Bright (Remove rust to reply)
116 Giulietta 3.0l Sprint 1.7 GTV TS GT 3.2 V6
Triumph Sprint ST 1050: It's blue, see.
#www.cuore-sportivo.co.uk

 

That's what I thought.

 

Someone probably pointed out to the sufferers that pissing on the affected
area stops chilblains dead in their tracks. Cheap and always available.

"I don't need no steenking ointment"

 

And yet, it could have worked if he'd nutted the flat bit square on.

 

Bah, had loads of them go bang on the bench.

Vauxhall Tigras were the worst, you only had to jolt the seat on the
bench and they'd go off. There was a clip you could insert in the
pre-tensioner to stop it doing this, but the shock of the jolt used to
make it fall out, then BANG... that's another 35 quid gone on replacing
it.

--
Lozzo
Versys 650 Inter-Continental Hyperbolistic Missile , CBR600F-W racebike
in the making, TS250C, RD400F (somewhere)
BMW E46 318iSE (it's a car, not one of those 2-wheeled pieces of shite
they churn out)

 

Have you never seen how the bottom of a gas bottle (47Kg Propane bottle)
freezes when you let gas out? There's a perfect line where the top of the
gas is, when it's in its liquid state. Stop demanding gas and it stops
freezing.

Spray cans get colder when you use them too.

 

And your point is?

 

Wotcha.

Not guilty.
I've never been one for older Triumphs, but I don't think I'd try to take a
Sprung Hub apart after hearing tales and seeing scars ;-)

 

Wotcha.

I think the Harley manual had something similar.

 

Or ... adiabatic expansion

 

Slowly (isothermal) or quickly (adiabatic )?