Vertical speed indicator[PDF]

Mechanism

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The vertical speeed indicator senses the difference between the instataneous static pressure and the static pressure few seconds ago.

Aspect

The vertical speed indicator (VSI), called also variometer or a vertical velocity indicator, indicates whether the airplane is climbing, descending, or in level flight. The rate of climb or descent is indicated in feet per minute. If properly calibrated, the VSI indicates zero in level flight.
240px-Vertical_Speed_Indicator.svg.png
Aircraft maintain its altitude in level flight


The VSI does not display immediately an accurate indication of a climbing or descending rate. There exists a lag or a time between the initial changes in the rate of climb/descent and the display of this new rate.

Note that turbulence can extend the lag period and cause erratic and unstable rate indications. In some aircraft a vertical speed indicator (IVSI) exists, which incorporates accelerometers to compensate for the lag in the typical VSI.

Use

VSI example.png

See also

Reference

  • None

Author

  • VID 150259 - Creation
  • VID 450012 - Wiki integration

DATE OF SUBMISSION

  • 02:14, 14 May 2021

COPYRIGHT

  • This documentation is copyrighted as part of the intellectual property of the International Virtual Aviation Organisation.

DISCLAIMER

  • The content of this documentation is intended for aviation simulation only and must not be used for real aviation operations.