Another problem with low pressure or high altitude are heat dissipation.
The thinner the air is, they more you need to relay on radiation and
less on convection.

Tal

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Andy Kunz
> Sent: Monday, February 03, 2003 1:46 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC]: Shuttle related question
>
>
> Well, astronauts' lungs would explode at 0PSI too.  That's
> why they are in a pressurized cabin.
>
> Andy
>
> At 10:08 AM 2/3/03 -0600, you wrote:
> >Nate Duehr wrote:
> >> Watching downlink video, even I can see that laptop computers are
> >> flown regularly as part of standard hardware.  What *are*
> you talking
> >> about?
> >
> >I have seen that, and I wondered about the hard drives. At
> low absolute
> >pressure, the disks would crash. I don't know what the
> functional lower
> >limit is for barometric pressure to maintain operation, but I would
> >suspect it is at least a few PSI. Consequently, maybe they
> use sealed
> >hard drives on those computers, just in case? Or perhaps
> they have more
> >important things to worry about if they have to depressurize.
> >
> >--
> >
> >Mike Poulton
> >mpoulton@mtptech.com
> >MTP Technologies
> >KC0LLX
> >
> >--
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