Peter Hill wrote:
> On Mon, 14 Jul 2008 17:07:06 +0100, Peter Hill
>
nospam.demon.co.uk> wrote:
> >> On Mon, 14 Jul 2008 06:08:32 -0700 (PDT), allan tracy
>>
hotmail.com> wrote:
>>>>> Call me biased but I think the trains were the stars of the show last
>>> night.
>>>
>>> Very entertaining as ever, though ‘we like to keep these things
>>> (races) as close as possible’ did amount to sending May and Hammond on
>>> the train via Kyoto. That’s a bit like racing from Aberystwyth to
>>> London with the train passengers having to go via Edinburgh.
>> There is no more direct rail route. They may have tunneled a M-way
>> though those mountains but have yet to work out how to tunnel for a
>> train. Trains need a flatter straighter route that would need 100's of
>> miles of tunnel in an earthquake zone making the Channel Tunnel look
>> like a breeze. Crossing the mountain backbone of Japan is quite an
>> extreme short haul plane trip, to operate with the required climb rate
>> the engines have a special rating just for ANA to do it.
>>
>>> May was impressed by the trains (he’s a bit of crank on the quiet
>>> apparently) whilst Clarkson acted the pratt brilliantly, as usual –
>>> the Bill Oddy face mask was priceless.
>>>
>>> Nice car as well but really, car and gearbox have to be a matching
>>> pair???
>>>
>>> More of this please.
>> ditto.
>>
>> As for Nitrogen in the tyres. More stable than air? BULLSHIT!!
>> (Well so long as the garage air line has a properly serviced and
>> functioning dryer on it)
It says that for _truck_ tyres, which has no bearing on whether a car's
tyres would be better filled with N2. Certainly, my car loses nothing
like 2psi per month.
> That would mean N2 is over 23 times less leaky than O2.
> air leak / N2 leak = 6 = (0.78 N2leak + 0.22 O2leak) / N2leak
> 6 N2leak = 0.78 N2leak + 0.22 O2leak
> 5.22 N2leak = 0.22 O2leak
> O2leak / N2leak = 23.7
> (can you smell the brown sticky stuff?)
I find this suspicious, as well.
However, the article also says that one of the reasons why tyres leak
more with air is due to corrosion products causing the tyre valve to
fail to seat properly. This is much more plausible.
I think that the use of properly dry air would avoid many of the alleged
problems that the use of N2 is supposed to avoid. For instance, most
mechanisms of corrosion of metals (e.g. rusting) require both O2 and
liquid moisture, so exclude moisture and you avoid the problem.
