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What errors does a Vertical Speed Indicator suffer from?

1. Position error
2. Instrument error
3. Hyperbaric error
4. Pitot and static error
5. Manoeuvring error
6. Lag/timing

  • A

    1, 2, 5, 6

  • B

    1, 2, 3, 5, 6

  • C

    1, 2, 4, 5, 6

  • D

    2, 3, 5, 6

VERTICAL SPEED INDICATOR
A vertical speed indicator is an instrument which shows the pilot the rate of change in altitude in feet per minute (or m/s) and it operates due to the change in air pressure when the aircraft changes its altitude.

VSI Errors:

  • POSITION: caused by fluctuations in the static port or lines. It may wrongly indicate a climb or descent when speed is changed.
  • INSTRUMENT: occurs due to manufacturing imperfections.
  • MANOEUVRING: different changes in attitude and configurations of the aircraft will lead to this type.
  • LAG/TIMING: The pointer would take sometime to indicate the change from the time it senses it. This error is most noticeable during prolonged climb or descents at a high rate.

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