When CAS is corrected for compressibility error you obtain which speed?

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Multiple Choice

When CAS is corrected for compressibility error you obtain which speed?

Explanation:
Compressibility effects change how the pitot-static system reads dynamic pressure, especially at higher subsonic speeds. Calibrated airspeed already accounts for installation and instrument errors, but it doesn’t adjust for the change in pressure readings caused by air being compressible. When you apply a compressibility correction to CAS, you convert that reading into Equivalent Air Speed. EAS is the speed at sea level standard density that would produce the same incompressible dynamic pressure as the actual flight condition, making it a common way to compare speeds across different altitudes and conditions. So the corrected value is Equivalent Air Speed.

Compressibility effects change how the pitot-static system reads dynamic pressure, especially at higher subsonic speeds. Calibrated airspeed already accounts for installation and instrument errors, but it doesn’t adjust for the change in pressure readings caused by air being compressible. When you apply a compressibility correction to CAS, you convert that reading into Equivalent Air Speed. EAS is the speed at sea level standard density that would produce the same incompressible dynamic pressure as the actual flight condition, making it a common way to compare speeds across different altitudes and conditions. So the corrected value is Equivalent Air Speed.

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