How cold does it get when you depressurise during flight testing?
I am really interested to know from a practical what kind of temperature drop you would get overall from the combination of loosing your warm air through the outflow valves coupled with the adiabatic heat loss. I guess it will vary with aircraft volume and OATs etc but any empirical experience would be much appreciated.
I have looked at the engineering responses to this question and calculating it mathematically seems to require computer simulations. Thanks in advance.