Density

Introduction to Glider Flying > Soaring Weather > The Atmosphere > Density

The density of any given gas is the total mass of mole-cules in a specified volume, expressed in units of mass per volume. Low air density means a fewer number of air molecules in a specified volume while high air den-sity means a greater number of air molecules in the same volume. Air density affects aircraft performance, as noted in Chapter 5–Glider Performance.