This is a discussion on attempts to obtain foreign combat types: Saab Draken, Mirage, Harrier, P-16 .... within the Air Force forums, part of the China Defense & Military category; Originally Posted by i.e. without an enviornmental system (read: A/C) the pilot would have frozen to death at 50000 ft. ...
On a side note, there are some interesting stories related to that.
For example, when testing the avionics for certain new aircraft (J10? H6K?) on the ground, since the fighter is on the ground, the AC system is not running, and avionics overheats.
Some professor lead a team to solve this issue. While his graduate students are trying hard to figure out how to run the on-plane AC system, the professor simply said "why not run the AC off the airplane?" Then they had a simple solution - using the maintenance truck to run the AC system, simply hook it up to the aircraft's AC pipes.