In a message dated 98-03-09 15:13:04 EST, [email protected] writes:
<< Ok, this is rather old but the atmosphere is still
pretty much the same. Assuming your standing at
sea level with 1 atmosphere pressure and +15C temp
and you start to rise in altitude, you'll have
roughly dependent upon alot of other factors ...
Altitude Temperature Pressure Approx Ratio of
(feet) F C lb/ft^2 Altitude to sea level
0 + 59 + 15 2.12 x 10^3 0
20,000 - 12 - 24 9.73 x 10^2 1/2
40,000 - 70 - 57 3.93 x 10^2 1/5
60,000 - 70 - 57 1.51 x 10^2 1/10
80,000 - 70 - 57 5.81 x 10 1/50
100,000 - 41 - 41 2.31 x 10 1/100
Assuming that you won't be shipping anything in an
unpressurized cabin much above 60,000 ft,
then testing for
temp = -70C,
pressure = (14.7 lb/sq.in.)/10 = 1.47 lb/sq.in.
should do it.
Speaking of humidity at temperatures near or below
freezing doesn't really mean anything.
----------
> From: [email protected]
> To: [email protected]
> Subject: transportation environmental condition
> Date: Monday, March 09, 1998 8:43 AM
>
> Hello all!
> Does anybody know the foreseeable environmental condition (temperature,
> humidity, pressure) you have during transportation of a device on a
plane?
>
> Of course they depend on flight heigth, but is it possible to get rough,
> common-sense data for the design of packaging?
>
> Many thanks
> Massimo
>
> -------------------------------------------------------
> ESAOTE S.p.A. Massimo Polignano
> Research & Product Development Regulatory Affairs
> Via di Caciolle,15 tel:+39.55.4229402
> I- 50127 Florence fax:+39.55.4223305
> e-mail: [email protected]
>
>>
If you're speaking of CARGO compartment conditions, I believe that those are
pressurized and heated to about 50 degrees F on passenger planes (otherwise, I
suspect, passengers would get upset about their freeze-dried pets and
luggage).
Does anyone know of any standard conditions for cargo compartments?
Mike Sherman
FSI International
[email protected]
[[email protected]]
