From the "ECTM" graph:
Constant EAS: CAS, TAS and MACH number increase with increasing altitude.
Constant CAS: EAS decreases with increasing altitude, TAS and MACH number increase with increasing altitude
Constant TAS: EAS and CAS decrease with increasing altitude, MACH number increases with incrasing altitude.
Constant MACH number: EAS, CAS and TAS decrease with increasing altitude.
Last edited by slav4o1; 30th Dec 2010 at 16:24.