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Continuous wing design for a high-performance glider
Přikrylová, Helena ; Bartoněk, Jaroslav (referee) ; Juračka, Jaroslav (advisor)
The vast improvements in the field of aerodynamics and materials in the recent decades have brought significant changes in the geometry of sailplane wings. From the structural point of view, the maximum thickness of the used airfoils has decreased which in turn caused lowering the height of a spar. That necessitates strengthening of the spar flanges which again leads to shortening the distance between their opposite surfaces hence shortening the shear webs as well. Together with the need of sectioning in the cases of gliders with larger wingspans a question arises as to whether the conventional single spar design with wing connections in the glider’s longitudinal plane of symmetry by means of heavy spar extensions is the best possible solution. This thesis proposes a continuous wing design of a high-performance glider with the use of a two-spar and multi-web structure implementing a focus on determining of an appropriate sectioning.
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Flight control system design for modern sailplane
Kocour, Petr ; Šplíchal, Jan (referee) ; Dubnický, Lukáš (advisor)
The thesis focuses on flight control mechanisms used in sailplanes or alternatively ultralight airplanes. The research done shows basic demands put on the flight control mechanisms and the different solutions that can be used to fulfill these demands. The research summary then compares the alternative solutions to each other. In the following chapter, the wing in subject is introduced, including its main parameters. Following is a description of the chosen variants for the flight control mechanism initial design, with explanations of why those variants were chosen. The result is a flight control mechanism initial design, which incorporates the selected properties, including for example automatic connection of separate mechanisms, differentiation of aileron deflection, different ratios of aileron to flap deflection for the inner and outer flaperon segments or placement of the summary mechanism into the wing itself. To check the suitability of the initial design, a stress calculation was carried out on what was approximated to be the part of the mechanism subjected to the most stress. The results of the FEM calculation suggested eligibility of the mechanism, showing the Von-Mises stress of 61 MPa, well below the yield strength of common aluminum alloys.
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Conceptual design of high performance glider with electric propulsion (in complience with EASA CS-22)
Hlůšek, Josef ; Sklenář, Filip (referee) ; Hlinka, Jiří (advisor)
This master's thesis is focused on conceptual design of glider with electric propulsion system following the CS-22 regulation. Statistical analysis of the glider with an auxiliary electric engine has been carried out in order to determine basic design parameters for conceptual design. Based on analytical drag polar, the flight performance parameters are calculated, in particular flight range and influence of the solar panels on the flight range. This thesis also includes preliminary design solution of accumulator placement within the wing.
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Aerodynamic design of transonic UAV glider
Kóňa, Marián ; Pejchar, Jan (referee) ; Zikmund, Pavel (advisor)
This master thesis is focused on aerodynamic design of transonic glider, which is assigned for following an airliner at cruising regime of flight. Main goal of the thesis is to determine basic geometrical design of airplane with respect to Whitcomb aera rule, mass analysis and drag polar. Weight analysis includes determining center of gravity according to longitudinal static stability margin. The drag polar of the airplane is determine for cruising regime of flight, that means the regime of following an airliner.
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Development and use of non-motorized aircraft
Bečka, Pavel ; Schoř, Pavel (referee) ; Zablatzký, Jiří (advisor)
The object of this bachelor thesis is history, development and use of non-motorized aircraft. The first part dedicate of history this aircraft industry in the Word and Czechoslovakia. The second part dedicate about construction of this machines. The Thirst part dedicate of materials, which are using in this part of aeronautical production. And finally fourth part dedicate ways for starts of this aircrafts.
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Load State of an Aircraft with an Elastic Wing
Schoř, Pavel ; Daněk, Vladimír (referee) ; Slavík, Svatomír (referee) ; Píštěk, Antonín (advisor)
V této práci je navržena metoda výpočtu zatížení letadla s netuhým křídlem, založená na spojení panelové metody prvního řádu dle Katz and Plotkin, Low-Speed Aerodynamics, 2001 s metodou stukturální analýzy dle Píštěk et al., Pevnost a životnost letadel I, 1988 a Lebofsky,Numerically Generated Tangent Stiffness Matrices for Geometrically Non-Linear Struc- tures, 2013. Panelová metoda poskytuje přasná data pro výpočet zatížení křídla od vzdušných sil za předpokladu že lze dané proudění aproximovat po- mocí potenciálního proudění, Narozdíl metod založených na interakci s CFD metodami lze navrženou metodu používat i na bežném počítači.
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