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Questions about the different choices that aircraft designers (typically aerospace engineers) make in order to create an aircraft.

4 votes
1 answer
618 views

What are the specific number of passengers and conditions required to select HI, NORM, or LO...

On the Airbus A320 there is a pack flow knob and you can either select HI(120%), NORM (100%), or LO (80%). You choose which one according to the number of passengers and ambient conditions. Obviously …
Itzyoboi's user avatar
  • 741
2 votes
3 answers
3k views

How does the pressure change in the Air Cycle Machine?

In this picture: #3 says: "Air expanding to ambient pressure turns expansion turbine, is greatly cooled, and drives compressor." I understand all of that except for the "air expanding to ambi …
Itzyoboi's user avatar
  • 741