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SKLENÁŘ, F. MATĚJŮ, J.
Original Title
Indicated airspeed error due to gradual bloking of pitot tube with drain hole
Type
journal article in Web of Science
Language
English
Original Abstract
Problem of pitot tube blocking is persistent because even in the recent past there have been several accidents based on inaccurate information from air speed indicators. This problem was caused by a partial or complete blockage of the total pressure probes. Certain principles of blocking detection are well known. This article describes research into another principle of the gradual blocking detection of the pitot tube with drain holes. Pitot tubes with different blockage ratios were made and tested. A gradual blocking curve was described. The independence of velocity magnitude for the investigated airspeeds was found. This research shows that the drain hole design can be useful for a pitot tube blockage detection. The principle is based on another pitot tube with a larger drain hole area. Airspeed error due to gradual blocking grows faster on the other pitot tube. Gradual blocking of both pitot tubes results in a difference in indicated airspeeds, even at constant speed flight and before full blockage. This airspeed difference can warn a pilot and gives him or her a valuable time to use emergency procedures.
Keywords
pitot tube, total pressure, static pressure, blocking, unreliable airspeed
Authors
SKLENÁŘ, F.; MATĚJŮ, J.
Released
5. 4. 2022
Publisher
Vilnius Gediminas Technical University
Location
Vilnius
ISBN
1822-4180
Periodical
AVIATION Research Journal of Vilnius Gediminas Technical University
Year of study
26
Number
1
State
Republic of Lithuania
Pages from
64
Pages to
71
Pages count
8
URL
https://journals.vilniustech.lt/index.php/Aviation/article/view/15963/10901
BibTex
@article{BUT180268, author="Filip {Sklenář} and Jiří {Matějů}", title="Indicated airspeed error due to gradual bloking of pitot tube with drain hole", journal="AVIATION Research Journal of Vilnius Gediminas Technical University", year="2022", volume="26", number="1", pages="64--71", doi="10.3846/aviation.2022.15963", issn="1822-4180", url="https://journals.vilniustech.lt/index.php/Aviation/article/view/15963/10901" }