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\n\nDensity Altitude Calculator (ASOS Data)
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How it works
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Density Altitude is the indicated altitude of an aircraft when the effect of air density on its performance is taken into account. It is used to determine how well an aircraft will perform at a specific altitude, temperature, and pressure. Lower density altitude means better aircraft performance.
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Example
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If an aircraft is at a pressure altitude of 5000 ft and the temperature is 25°C, the density altitude is approximately 6758 ft. This means the aircraft will perform as if it were at 6758 ft, even though it is only at 5000 ft.
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Variables
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| Variable | Description | Unit |
|---|---|---|
| Pressure Altitude | Altitude shown on an aircraft’s altimeter when the pressure is set to 29.92 inches of mercury (inHg) or 1013.25 hectopascals (hPa) | ft |
| Temperature | Ambient air temperature | °C |
| Density Altitude | Altitude at which the air density equals the actual air density at the aircraft’s current location | ft |
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Factors Affecting Density Altitude
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- Temperature: Higher temperatures increase density altitude, reducing aircraft performance.
- Pressure: Lower pressure increases density altitude, reducing aircraft performance.
- Humidity: High humidity increases density altitude, reducing aircraft performance.
- Elevation: Higher elevations have higher density altitudes.
- Aircraft Performance: Aircraft perform better at lower density altitudes.
- Takeoff Distance: Takeoff distance increases with increasing density altitude.
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