Density

Question 1

Relative Density

Answer 1

Todays density vs ISA as a percentage

Question 2

Density Altitude

Answer 2

Pressure Alt corrected for temp variation from ISA

1 degree difference from ISA = 120 ft

PA + (120 x ISA Dev)

Question 3

Density (kg/m3) in relation to Pressure/Temp/Humidty

Answer 3

Inc Pressure Inc Density
Inc Temp Dec Density
Inc Humidity Dec Density

Question 4

Density and A/C performance

Answer 4

Density decreases A/C performance

T/O distance/climb and LD distance

Question 5

Temp on density

Answer 5

Increase temp air molecules move more increasing volume therefore density of air decreases

Question 6

Pressure on density

Answer 6

High pressure increase volume decreases for air molecules and therefore density increases

Question 7

Humidity on density

Answer 7

Water molecules make air lighter so therefore air becomes less dense

Question 8

What has the greatest effect on density

Answer 8

Pressure

Question 9

Density at key altitudes

Answer 9

MSL - 1.225kg/m3
10,000ft - 0.903kg/m3
22,000ft - 0.609kg/m3
40,000ft - 0.302kg/m3