Calibrating an airspeed instrument is not hard, if you first set up a reference manometer and be patient..
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The airspeed indicator has a bunch of set screws that interact with the movement at different air speeds so calibration is an interactive process.
Carl
Calibrating an airspeed instrument is not hard, if you first set up a reference manometer and be patient..
![]()
The airspeed indicator has a bunch of set screws that interact with the movement at different air speeds so calibration is an interactive process.
PDF files of manometer height versus airspeed are available via Google search for download.
Carl
Got no pass on the airspeed indicator when I had inspection done - Indicates a bit too much.