What does the term "density altitude" mean?

Density altitude refers to the pressure altitude adjusted for non-standard temperature conditions. This term is crucial for pilots, as it directly affects aircraft performance, including lift, engine power, and propeller efficiency.

When air temperature rises, it becomes less dense, causing a discrepancy between the actual pressure altitude and the density altitude. Standard atmospheric conditions (often referred to in aviation) are based on a temperature of 15°C at sea level. If the temperature is higher than this, the density altitude increases, meaning the aircraft will perform as if it were at a higher physical altitude. This can significantly impact takeoff distances, climb performance, and overall aircraft control.

Understanding density altitude helps pilots make informed decisions about aircraft performance in various atmospheric conditions, ensuring safer flight operations.