TAS, TAT, and SAT information are valid only above which airspeed?

TAS, TAT, and SAT information are valid only above which airspeed?

• A. 40 knots
• B. 60 knots
• C. 80 knots
• D. 100 knots

Answer: (B)

Air data readings like TAS (true airspeed), TAT (total air temperature), and SAT (static air temperature) come from sensors that need sufficient airflow to provide accurate signals. The pitot-static system and temperature probes generate data based on dynamic pressure and outside temperature, and the air data computer is calibrated to trust those signals only when there’s enough airflow. Below about 60 knots, the dynamic pressure is too small and sensor/flow distortions can introduce errors, so these readings are not considered valid. Once you’re above 60 knots, the sensors produce reliable TAS, TAT, and SAT values.

Air data readings like TAS (true airspeed), TAT (total air temperature), and SAT (static air temperature) come from sensors that need sufficient airflow to provide accurate signals. The pitot-static system and temperature probes generate data based on dynamic pressure and outside temperature, and the air data computer is calibrated to trust those signals only when there’s enough airflow. Below about 60 knots, the dynamic pressure is too small and sensor/flow distortions can introduce errors, so these readings are not considered valid. Once you’re above 60 knots, the sensors produce reliable TAS, TAT, and SAT values.