Weve all been through enough ground school to know and understand that high ambient outside temperatures adversely impact aircraft performance. The relationship between temperature and altitude, of course, is termed density altitude, which describes a locations pressure altitude adjusted for temperature. To put it another way, density altitude is your elevation when measured in terms 288
Density Altitude: Five Things To Remember
Weve all been through enough ground school to know and understand that high ambient outside temperatures adversely impact aircraft performance. The relationship between temperature and altitude, of course, is termed density altitude, which describes a locations pressure altitude adjusted for temperature. To put it another way, density altitude is your elevation when measured in terms of the density of the air rather than height above sea level. It can be higher or lower than your actual altitude above sea level.
Key Takeaways:
- High density altitude, primarily caused by high temperatures and low atmospheric pressure, significantly degrades aircraft performance by reducing wing lift, engine power output, and propeller thrust.
- Humidity further exacerbates the effects of high density altitude by making the air even less dense, adding an additional, albeit minor, penalty to aircraft performance.
- The less dense air at high density altitudes also poses physiological risks to pilots, increasing the potential for hypoxia and requiring consideration for supplemental oxygen at lower-than-standard altitudes.
- Even turbocharged engines are affected by high density altitude, as the compression process heats induction air, which can negate some performance benefits and necessitate careful performance calculations.
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