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

How does a standard mechanical Vertical Speed Indicator (VSI) measure rate of climb or descent?

By comparing pitot total pressure against cabin static pressure By measuring the rate of change of static pressure via a calibrated leak (capillary tube) By measuring gyro precession forced by vertical acceleration By using an evacuated aneroid capsule connected to the pitot line

Correct Answer:

By measuring the rate of change of static pressure via a calibrated leak (capillary tube)

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