Home > Exam Quiz Archive > Quiz PPL(A) English - Exam test Private Pilot License > Aircraft General Knowledge > At higher altitudes, true airspeed (TAS) tends to be higher than calibrated airspeed (CAS). A rough estimate of the TAS can be obtained by...

Subtracting 2 % of the CAS for every 1000 ft altitude. |

Adding 10 % of the CAS for every 1000 ft altitude. |

Subtracting 10 % of the CAS for every 1000 m altitude. |

Adding 2 % of the CAS for every 1000 ft altitude. |

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#### Explanation: At higher altitudes, true airspeed (TAS) tends to be higher than calibrated airspeed (CAS). A rough estimate of the TAS can be obtained by...

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