Density Altitude estimation

For each ? C change in temperature, density altitude changes by 120 feet. So at sea level (standard temp = 1?C), a temperature of 2? C is a 1? C increase, therefore the density altitude will be 1200 feet. Conversely, a temperature of ? C would give a density altitude of -1200 feet (yes, below sea level).

Note that the standard lapse rate of ? C for each 1,000 feet of altitude means that the standard temperature at 5,000 feet would be ? C, so that same 2? C reading in Denver would give a density altitude of 5,000 plus 2400 feet, or 7400 feet.

This information is important, because aircraft performance decreases with increasing density altitude.

This page has been seen 864 times.