1, pitot tube mainly obtains airspeed by measuring airflow pressure.

2. The static pressure measured by pitot tube can also be used as the calculation parameter of altimeter.

3. The static pressure measured by pitot tube can also be made into a "vertical speedometer", that is, the speed of aircraft altitude change can be measured.

Second, the structure and working principle of aircraft pitot tube

Aircraft pitot tube is installed on the nose or wing of the aircraft and consists of two concentric tubes, the inner circular tube is the total pressure tube and the outer tube is the static pressure tube. The working principle of aircraft pitot tube is that the sensor at the end of aircraft pitot tube will feel the impact of airflow, measure the outlet airflow pressure, and then get the airspeed.

Extended data

Aircraft pitot tube has drainage holes and heating function to prevent pitot tube from being blocked by water or ice. Usually, when the plane stops, the pitot tube should be covered with a protective sleeve to prevent insects or sundries from blocking it, and the protective sleeve should be removed before flying. A red ribbon is tied to the protective sleeve, which is an eye-catching warning.

If the pitot tube fails, is blocked by ice or the protective sleeve is not removed, it will not be able to display the correct flight speed reading, which will cause serious accidents such as plane crash and death.

Pitot tubes are also different in length. If the pitot tube is very long, it will completely affect the vision of fighter pilots when flying, and it will also affect the range of fighters when driving on the ground, which will be greatly affected in investigation.

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