Water resistant aircraft pitot device

摘要

A pitot tube system having a pitot tube containing a porous hydrophobic fabric that blocks water and contaminants from reaching a pressure sensor. The distance in the pitot tube between the fabric and a front orifice of the tube is less than 2.4 times the height of the orifice, and preferably less than or equal to 0.38 times the height. The section of the tube through which the fabric extends defines an opening characterized by a minimum dimension greater than 0.15 inches, and preferably being at least 0.21 inches. The tube is a removable structure that attaches to a mount that forms a passage for communicating the pressure in the tube. That passage contains a second porous hydrophobic fabric that also blocks water and contaminants from reaching a pressure sensor.

主权项

1. A pitot device for use in an airflow, comprising:
a pitot housing forming a cavity having a housing external orifice characterized by a housing external-orifice height; an air-permeable fabric extending across a section of the cavity and defining an internal chamber; and a pressure sensor configured to sense information regarding the pressure within the internal chamber; wherein the distance within the cavity between the air-permeable fabric and the housing external orifice is less than 2.4 times the housing external-orifice height.