Cathartic.
It is high problem of course
The cruise height of civil aviaton plane is in commonly 7000, 12000 meters, every lift atmospheric pressure and temperature can be reduced. In headroom, the plane is external the environment is microtherm low pressure, probably 0 50 degrees, the appearance of 0.25 atmosphere.
If whats are done, so the person on the plane is anoxic and insensible + aspic becomes ice-lolly. So the engine room of the plane needs pressure boost, it is OK to reduce air reduce air the person the pressure of subsist.
Do those who cross A380 to should know, showing to the temperature outside can see on screen, generally speaking, in 9000 meters of cruise when, temperature basically achieved 40-50 0 times to spend outside.
But, parachute jumping is not quite same. Airborne height is in our country airborne arms commonly 400 (500) - 800 meters, parachute jumping height exceeds a base, time of leave a blank is shorter, war more advantageous, dangerous sex is taller at the same time.
Airborne arms 15 army Ceng Jin is in plain of short of Wenshui River has had Jing day to jump, the person of this understanding may know:
Local altitude 1300, aircraft altitude 5000, the one insecurity with bad physical ability, anoxic, cold estimation faints directly.
In so abominable environment parachute, ground case is not clear. Gave cloud layer to arrive the ground probably also with respect to many minutes 10, the way that if fly,is in before that is wrong, gave cloud layer to see again descend dot, you fly to descend repeatedly the time of the dot is insufficient, want to know parachute does not have motivation again
15 liberation army capture jumped to one of cloud layer little gap, basically follow distinction of court death it doesn't matter.
