- #1

PA32

- 8

- 0

*"close to" linear*at the lower altitude ranges (below about 25,000 feet). Above this, the lines get progressively more non-linear.

Can anyone tell me what the equation is that determines the values on this chart? i.e., if I did not have the chart handy, and if I knew my current aircraft altitude (in feet), and my current cabin differential pressure (in PSI), and wanted to calculate my predicted cabin altitude (in feet) based on these factors, what equation would I use?