[R-390] Cosmos Dis-assembly

[David Wise]

If it's dry enough, that's a neat tip for members;
probably get a little shot for next to nothing.

But I don't think it makes any difference over the
long run.  The seal is far from perfect, so with
every change in temperature or atmospheric pressure,
the PTO will "breathe" out or in, a little, and
every inhalation will dilute the interior gas with
whatever's out there.  Eventually the interior will
just be air.  An initial load of dry air gives
the dessicant a little boost, but that's all.

Dave Wise

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net] On Behalf Of rbethman
Sent: Monday, April 19, 2010 12:59 PM
To: r-390 at mailman.qth.net
Subject: Re: [R-390] Cosmos Dis-assembly

Costco also is using Nitrogen for the tires it sells.

They even put a "green" cap on the valve stem.

I only suggested Argon since it is one of the "Noble" gases.  This means 
that it does NOT react with other elements, at least not in a 
detrimental way.

Nitrogen is NOT a noble gas.  It DOES react with things.  To keep items 
protected with a gas "blanket" or such that constantly varies, Nitrogen 
is fine.  Very long exposure periods without BIG variations in temp and 
pressure are "usually" better served with a "Noble" gas, as there will 
not be corrosion.

No one is worried about the steel wheels of your car to be protected 
against corrosion when you see the outside is exposed to temp extremes 
along with salt, sand, and the like.

We've changed since these radios have come out.

Now we are trying to preserve, restore, and use them.  ( A bit of a 
mixed bag! )

Bob - N0DGN

On 4/19/2010 3:35 PM, ka9egw at britewerkz.com wrote:
> A lot of hot-rod and chopper and crotch-rocket [...er, sportbike] shops have
> nitrogen for 'airing' up tires, makes for less change in the vehicle's
> handling as a function of tire temp, supposedly.
>
> 73, Brian KA9EGW