Uzdužna stabilnost i upravljivost jednomotornog niskokrilca pogonjenog elisnom pogonskom grupom Milenković-Babić, Miodrag, 1983-, 67238409 Predmet doktorske disertacije je istraživanje stabilnosti i upravljivosti aviona LASTA sa posebnim osvrtom na uticaj pogonske grupe sa vučnom elisom razmatranog jednomotornog niskokrilca. Činjenica je da teorijske i numeričke metode ne mogu da ponude uvek rezultate potrebne za donošenje odluke o detaljnom projektovanju u mnogim praktičnim problemima. Da bi se prevazišao ovaj problem koriste se rezultati aerotunelskih ispitivanja odgovarajućih modela letelica i letnih ispitivanja. Najracionalniji pristup u rešavanju skoro svakog aerodinamičkog problema baziran je na primeni teoretskih rezultata, eksperimentalnih i numeričkih metoda, kombinovanim na odgovarajući način i dopunjenih iskustvom i znanjem. Istraživanje u ovoj disertaciji je sprovedeno na osnovu teorijskih metoda proračuna prisutnih u literaturi dugi niz godina, modifikovanog proračunu doprinosa vučne sile pogonske grupe sa elisom, aerotunelskim rezultatima i letnim ispitivanjima. Dat je i kratak osvrt na u ovom trenutku dostupne podatke o ispitivanjima letelica putem CFD simulacija kao i primene rezultata aerotunelskih ispitivanja. Ispitivanja su izvršena kako za zadnju centražu, za koju je pitanje stabilnosti kritično, tako i za prednju centražu gde se nameće problem upravljivosti, odnosno mogućnosti da se sa raspoloživim otklonom komande ostvari traženi manevar. Verifikacija proračunskih rezultata je ostvarena letnim ispitivanjima. Ovi rezultati su upređeni sa dostupnim rezultatima o avionima istog tipa. Unapređeni proračun doprinusa vučne sile pogonske grupe sa elisom uzdužnoj stabilnosti je prezentovane u ovom radu. Ove informacije omogućavaju precizniji proračun stabilnosti letelice. Тhe subject of the Ph.D. thesis is an investigation of stability and control of the aircraft LASTA, with a special interest in propeller thrust force contribution to airplane longitudinal stability. It is well known that theoretical and numerical methods cannot provide the results required for making detailed design decisions in many practical cases. In order to solve this problem experimental (wind tunnel and flight test) results are necessary. The most successful approach to solving almost any problem in aerodynamics is based on using results obtained theoretically, by experimentation, and by numerical methods, appropriately combined and complemented by experience. In this thesis research was done on the basis of theoretical calculated methods available in the literature for many years, modified calculated procedures for propeller thrust force contribution to the longitudinal stability, wind tunnel test results on aircraft model, and by flight test. A short retrospective of the CFD simulation results is given as well as wind tunnel test results. The research has been done for the rearward position of the center of gravity for which the stability of aircraft is critical, and also for the forward position of the center of gravity, for which control of the aircraft is critical, that is, the ability to obtain the required maneuver with the available control deflection. Verification of the research of the theoretical calculated methods was done by flight tests. Obtained results were compared with those from the worlds’ relevant single-engine tractor propeller aircraft. An improved calculation method for estimation of propeller thrust force contribution to airplane longitudinal stability analysis has been presented. This information should enable more precise insight into aircraft stability analysis and a better understanding of the physical process that occurs during maneuver flight. Nedić, Novak, 1953-, 13609575 Mitrović, Časlav, 1958-, 12508263 Kostić, Ivan, 1961-, 21774695 Bengin, Aleksandar, 1964-, 14153575 Šalinić, Slaviša, 1973-, 14823271 Samardžić, Marija, 1971-, 67239433 2020 2020 2020 2020 2020 2020 2020 2020 baccalaureate Dissertation X, 102 lista 7079943 bytes o:1352 ID=35558921 ; D-3421 thesis:8035 cobiss:35558921 https://phaidrakg.kg.ac.rs/o:1352 Thesis:8035 Cobiss:35558921 srp CC BY-NC-ND 2.0 AT http://creativecommons.org/licenses/by-nc-nd/2.0/at/