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Home > Exam Questions > BPL Hot-Air Balloon Pilot Licence > Aircraft General Knowledge > Which of the following options states the working principle of a vertical speed indicator?

58 - EASA BPL Hot-Air Balloon Theory in English - Which of the following options states the working principle of a vertical speed indicator?

Question 58 - Aircraft General Knowledge - BPL Hot-Air Balloon Pilot Licence

Total air pressure is measured and compared to static pressure

Static air pressure is measured and compared against a vacuum

Measuring the present static air pressure and comparing it to the static air pressure inside a reservoir

Measuring the vertical acceleration through the displacement of a gimbal-mounted mass

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