42 Air Data Measurement Airspeed

Question 1

Airspeeds

Answer 1

Indicated airspeed (IAS): airspeed shown on the ASI
CAS: IAS corrected for instrument and position error
EAS: CAS corrected for compressibility omitted below 250kts
TAS: EAS corrected for pressure and temperature. Use the memory aide ICE-T

Question 2

Airspeed errors and correction

Answer 2

Intrument error
Position and attitude error
Density error
Compressibility