Compressibility error in a pitot head is caused by
- misalignment of pitot head.
- blockage in the pitot tube.
- compression of air in the tube at high speed.
Explanation from PART66Online
At high speed the air entering the pitot tube is compressed rather than behaving as an incompressible flow, so the sensed dynamic pressure is higher than the simple square-law value. This compressibility error makes the ASI over-read and must be corrected for at high Mach numbers. It stems from the air's compression, not from a blockage or misalignment.
J
Jordi asked · 2 Sep 2021
shouldnt it be blockage or misalignment?
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