How is density altitude defined?

Density altitude is defined as pressure altitude adjusted for non-standard temperature. This concept is critical in aviation because it influences aircraft performance. The relationship between pressure and temperature affects the density of the air. When temperature deviates from the standard atmospheric conditions, the density of air decreases or increases accordingly.

At higher temperatures, the air becomes less dense, which can cause a decrease in aircraft performance. For instance, in hot weather, an aircraft may need a longer distance to take off and climb, as the air density is lower than what is considered standard at a given pressure altitude. Conversely, cooler temperatures lead to higher air density, enhancing aircraft performance. Thus, understanding how to calculate density altitude is essential for pilots to ensure safe and efficient flight operations.