True airspeed (planned)

Pre-flight TAS from CAS, pressure altitude, and the forecast static OAT, using compressible-flow relations on the ICAO standard atmosphere.

ALT & SPD

TRUE AIRSPEED (PLANNED)3/32SOLVED

Calibrated airspeed

Pressure altitude

Outside air temp (static)

°C

How this is computed

Pre-flight TAS from CAS, pressure altitude, and the forecast static OAT, using compressible-flow relations on the ICAO standard atmosphere. Reproduces the ASA CX-3 manual's Planned TAS example to the last decimal: 125 kt CAS at 8,500 ft and −5 °C → 141.0 kt, M 0.221.

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