I think what Kiwi meant was that you do the "burp & fart" going from SL to
250, when the pressure outside the body is decreasing, as opposed to from
250 to SL, as you posited, when the external pressure would be *increasing*
rapidly.

JG



"Kiwi Jet Jock" wrote in message
...
In the pressure chamber,
from 25000 to sea level is instantaneous and you do a sustained
burp-and-fart.

Bob Gardner

Other way around Bob. (sea level to 25,000)



No way. You start off at sea level,