Originally Posted by
Speedwinner
thanks guys!
i think my misunderstanding is: why do I have to close the outflow valve during descend? I thought we toggle it open to get the same ambient pressure when we descend. I think I’m asking for the basics of the pressure cabin!
Hi,
try and have a look at the LIM-AIR chapter where there is a graph on aircraft altitude vs cabin altitude and it will most likely help you to understand the logic behind opening/closing of the outflow valve in order to control the pressurization.