SACAA CPL Instruments Practice Questions - SACAA Commercial Pilot Licence (Aeroplane) Instruments & Electronics Examination Exam

What is the primary internal mechanism inside a traditional mechanical Airspeed Indicator (ASI)?

An evacuated sealed aneroid capsule inside an airtight casing A flexible diaphragm receiving pitot pressure inside, surrounded by static pressure inside an airtight casing A Bourdon tube connected directly to the static vent A torque tube driven by a magnetic drag cup

Correct Answer:

A flexible diaphragm receiving pitot pressure inside, surrounded by static pressure inside an airtight casing

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