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What is true airspeed?(a) relative speed of aircraft with respect to the surrounding air flow(b) relative speed of aircraft sound with respect to the surrounding air flow sound(c) moment of aircraft with respect to air(d) moment of aircraft with respect to groundI got this question in final exam.I need to ask this question from Measurement of Airflow Characteristics in chapter Atmosphere and Air Data Measurement of Aircraft Performance

Answer»

The CORRECT option is (a) relative speed of aircraft with respect to the surrounding air flow

For explanation: TRUE airspeed is the relative speed of aircraft with respect to the surrounding air flow. As the altitude increases the pressure decreases and the true airspeed is GREATER than INDICATED airspeed. It is also REPRESENTED as TAS.



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