KAE Pressure And Density Flashcards
How to calculate pressure
Force / Area
What happens to the weight of air as you go up
It decreases as there are less particles
As altitude increases, pressure decreases
Standard rate of change in pressure
Reduce 1hPa per 27/30ft
What is another unit for a hPa
One milibar
How do altimeters work
They sense the change in pressure between the datum point and point we are at
What key points could be datum points
QFE
Standard setting
QNH
Why are temperature corrections important
If flying in colder air the more compressed air means you could get a reading that is lower than your true altitude
What are the lines on an isobar chart
They show the line of equal pressure, between each line is a gap of either 2 or 4 hPa
What does it mean if the isobars are close together
It will be very windy
What does QNH use
For every 27ft per hPa
What datum start does an isobar chart use
QFF
How to calculate density
Mass / Volume
What happens when temp decreases
Volume decreases so density increases
What happens when temp increases
Volume increases so density decreases
What is the relationship between density and pressure
Directly correlated as one increases the other does as well
