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Variable-sweep wing
Janiš, Martin ; Navrátil, Jan (referee) ; Dubnický, Lukáš (advisor)
This thesis summarizes the variable-sweep wing technology used in supersonic military aircraft from the second half of the 20th century. Aircraft with this technology are universally used today. The thesis contains a list of all active aircraft. Furthermore, the~effects of the variable wing sweep technology on the aircraft in terms of its flight characteristics, structural loads and maintenance requirements are described. The output of~the thesis is an analysis of a specific design solution on a selected type of aircraft and a general discussion of wingbox force loading. From these structural loads, the aerodynamic balancing problem is further addressed. The thesis concludes with a technical evaluation of the technology from the obtained findings. Its pros and cons are highlighted, from which the thesis explains a decline in use of the technology, while proving the opposite in its still possible use today.
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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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The electronic equipment of combat aircraft of 4th and 5th generation
Hron, Kvido ; Koštial, Rostislav (referee) ; Dubnický, Lukáš (advisor)
Modern aerial combat requires sophisticated electronic equipment to enhance the combat capabilities of fighter jets. This work focuses on the electronic equipment of fighter jets, emphasizing their advanced technological capabilities and operational significance. The study examines the development of electronic warfare systems, radar technologies, communication setups, and self-protection measures across different generations of fighter jets. The paper highlights the crucial role of electronic equipment in improving pilot situational awareness, survivability, and mission effectiveness in modern aerial combat scenarios. Additionally, the work explores the integration of advanced sensors, processors, and artificial intelligence algorithms in fourth- and fifth-generation fighter jets, elucidating their impact on mission success and operational superiority. By providing insights into the electronic equipment and capabilities of these advanced aerial platforms, this study contributes to a deeper understanding of the evolving aerial combat environment in the 21st century.
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Development and present state of Fly-By-Wire systems in aircraft controls
Cuber, Dominik ; Koštial, Rostislav (referee) ; Dubnický, Lukáš (advisor)
This bachelor thesis deals with a research on the development and state of art of Fly-By-Wire (FBW) flight control systems. In the first part, control surfaces and an overview of aircraft control systems are described. The main part addresses the Fly-By-Wire system in which the principle, control laws, advantages and basic elements of this system are described. This is followed by a depiction of the development of FBW systems, and the final section compares the Airbus and Boeing approaches to Fly-By-Wire. Overall, the thesis attempts to provide an overview of FBW systems, their development and their use in modern aviation.
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Aerial Refueling
Ďurďovič, Dušan ; Horpatzká, Michaela (referee) ; Dubnický, Lukáš (advisor)
This thesis is focused on aerial refueling. This paper describes brief history of development for both methods, aplication of both methods and also their construction description on both tanker and receiving aircraft. Last chapter focuses on current development of these methods and concepts for possible future aplication in aerospace engineering.
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Wing design of UAV aircraft
Chabada, Martin ; Dubnický, Lukáš (referee) ; Jebáček, Ivo (advisor)
The main aim of the this diploma thesis is the wing design of the UAV aircraft, including the appropriate material choice, calculation of the wing load and also strength analysis. Other goals include the design of the location and volume of fuel tanks, as well as the design of wingspan reduction after landing.
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Construction parts and Elements of the of Large transport aircraft Fuselage structure
Zubaľ, Filip ; Dubnický, Lukáš (referee) ; Juračka, Jaroslav (advisor)
Fuselage design is an area of aerospace engineering that combines aerodynamics with mechanical and material engineering. Many factors affect the construction and design of the fuselage. The bachelor thesis is focused on the processing and systematic ordering of individual structural units used in large transport aircraft. It points out the diversity of individual structural nodes in the design of the aircraft. The work is divided according to sections of the fuselage, where the specific design solutions for the node are then discussed. At the end of the work, I present a comparison of the two most famous competing aircraft models of Airbus and Boeing company. I pointed out the individual combinations of structural elements. Compared data are processed using tables and schematic figures. The bachelor thesis was also translated into a form of presentation intended for educational purposes.
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Rejected aircraft prototypes
Moštěk, Daniel ; Bartoněk, Jaroslav (referee) ; Dubnický, Lukáš (advisor)
The bachelor thesis focuses on seven rejected prototype aircraft that took part in tendering processes in Western Bloc countries during the Cold War. The development history of each of these aircraft is summarized, their technical properties are specified, the reason of their rejection is explored, and a comparison is made between them and the preferred aircraft. An assessment of gathered information is then made resulting in the conclusion that studying these rejected prototype aircraft can lead to valuable insights.
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Design of ski landing gear for skiplane with short take-off and landing
Hostinský, Vladimír ; Dubnický, Lukáš (referee) ; Katrňák, Tomáš (advisor)
The aim of this bachelor thesis is a selection of the most suitable ski landing gear for a use on a given STOL aircraft and its installation on the aircraft according to the law regulations and requirements of the aircraft manufacturer. First part is strictly teoretical and deals with existing design variants of an aircraft skis. More practical second part of this thesis starts with a market research, which creates an overview of existing options of ski landing gears suitable for use on the aircraft. Part continous with a reduction of the options and ends with a choice of the most suitable one. Final part is devoted to the problem of an installation of the landing gear to the given aircraft with consideration of existing law regulations.
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