Density Flashcards
Relative Density
Todays density vs ISA as a percentage
Density Altitude
Pressure Alt corrected for temp variation from ISA
1 degree difference from ISA = 120 ft
PA + (120 x ISA Dev)
Density (kg/m3) in relation to Pressure/Temp/Humidty
Inc Pressure Inc Density
Inc Temp Dec Density
Inc Humidity Dec Density
Density and A/C performance
Density decreases A/C performance
T/O distance/climb and LD distance
Temp on density
Increase temp air molecules move more increasing volume therefore density of air decreases
Pressure on density
High pressure increase volume decreases for air molecules and therefore density increases
Humidity on density
Water molecules make air lighter so therefore air becomes less dense
What has the greatest effect on density
Pressure
Density at key altitudes
MSL - 1.225kg/m3
10,000ft - 0.903kg/m3
22,000ft - 0.609kg/m3
40,000ft - 0.302kg/m3