Question

True airspeed (TAS) is \[ (\rho_0 = \text{Air density at sea level},\ \rho = \text{Air density through which aircraft flying}) \]

• A. \( EAS \sqrt{\frac{\rho_0}{\rho}} \)
• B. \( IAS \sqrt{\frac{\rho_0}{\rho}} \)
• C. \( CAS \sqrt{\frac{\rho_0}{\rho}} \)
• D. \( EAS \sqrt{\frac{\rho}{\rho_0}} \)

Hint:

TAS increases with altitude even if indicated airspeed remains constant due to decreasing air density.

Answer 1

The Correct Option is A

TAS is calculated from Equivalent Airspeed (EAS) by adjusting for air density: \[ TAS = EAS \times \sqrt{\frac{\rho_0}{\rho}} \] This accounts for changes in air density with altitude.