At higher altitudes, true airspeed (TAS) tends to be higher than calibrated airspeed (CAS). A rough estimate of the TAS can be obtained by...
Domanda 90, Aircraft General Knowledge - PPL(A) English - Private Pilot License (Aircraft)
| 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. |
