Indicated airspeed error due to gradual bloking of pitot tube with drain hole

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F22%3APU146441" target="_blank" >RIV/00216305:26210/22:PU146441 - isvavai.cz</a>
Result on the web
<a href="https://journals.vilniustech.lt/index.php/Aviation/article/view/15963/10901" target="_blank" >https://journals.vilniustech.lt/index.php/Aviation/article/view/15963/10901</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3846/aviation.2022.15963" target="_blank" >10.3846/aviation.2022.15963</a>

Result language
angličtina
Original language name
Indicated airspeed error due to gradual bloking of pitot tube with drain hole
Original language description
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.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20304 - Aerospace engineering

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical
AVIATION Research Journal of Vilnius Gediminas Technical University
ISSN
1822-4180
e-ISSN
—
Volume of the periodical
26
Issue of the periodical within the volume
1
Country of publishing house
LT - LITHUANIA
Number of pages
8
Pages from-to
64-71
UT code for WoS article
000778853000006
EID of the result in the Scopus database
2-s2.0-85127913163

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