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
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.
- 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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