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Methodology design and proper measurement setting evaluation of ultrasound testing of composite propellers
Běhal, Antonín ; Horák, Marek (referee) ; Katrňák, Tomáš (advisor)
This thesis focuses on non-destructive ultrasonic testing of composite aircraft propellers. The theoretical part contains a review of manufacturing technologies of laminate propellers and their design. The practical part of the thesis contains the design of ultrasonic testing methodology. Dolphicam 2+ device is used for testing. The creation of appropriate settings of the ultrasonic device, for different laminate thicknesses, is performed on calibration samples containing artificially created defects. By comparing the default and modified settings, it was found that the use of the modified settings greatly improves the distinguishability of the defects from the defect-free laminate. Confirmation of the functionality of the modified setup is performed using a real propeller test. The work serves as a sample procedure for testing a laminate propeller by ultrasonic defect detection.
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BUSINESS PLAN – Product Portfolio Expansion
Dítě, Radovan ; Hruška, Jan (referee) ; Heralecký, Tomáš (advisor)
This bachelor's thesis deals with business plan specifically extension of business portfolio. This portfolio should be enlarged by Quick Release System which allows quick assembly and dismantling propellers from UAVs. The dissertation is divided into three main parts. The first part describes the theoretical knowledge in the field of business economy and marketing. The second chapter is dedicated to description of product and analysis of the current state. The third part contains suggestion of introduction Quick Release System to the market based on theoretical knowledge and performed analysis.
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Design of a aircraft for towing and basic acrobtics
Loutocký, Jiří ; Šošovička, Róbert (referee) ; Mališ, Michal (advisor)
This master thesis solves conceptual design of aerotow airplane and airplane for basic aerobatics. Airplane is designed by using of specification CS-23. The first part of the thesis solves conceptual design. Especially possible concepts and choice the best one according to requests. Next part deals with flight performance of aerotow airplane in normal flight and also in aerobatics. The third part is engaged in main flight performance in aerotow. 3D system model of whole aircraft and compact disk with mentioned 3D model and electronic version of thesis is also added.
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Optimizing the selection of actuators for reconnaissance flying robot
Vítek, Milan ; Gábrlík, Petr (referee) ; Kříž, Vlastimil (advisor)
Purpose of this semestral thesis is to create a set of recommendations for choosing optimal motors, propellers and batteries for multi rotor flying vehicles with respect to flight time and flight dynamics. In this thesis you can find analysis of motor, propeller and battery properties and characteristics and their dependencies. Based on these findings there is a set of rules to choose optimal components and set optimal working point. This thesis also describes the design and implementation of a device used to measure the main characteristics of motors and propellers.
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The requirements of the airworthiness of aircraft
Pauliny, Jan ; Pejchar, Jan (referee) ; Chlebek, Jiří (advisor)
The focus of this study is to investigate the requirements and procedures for obtaining and maintaining a certificate of airworthiness of aircraft and aeronautical products within the scope of civil aviation. The requirements investigated include the standards regarding airworthiness requirements for large airplanes, helicopters, small airplanes, engines, and propellers. The procedures for certification and continuing airworthiness throughout the design, production and operating life of an aircraft are explained.
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Analysis of multicopter design concepts
Zeman, Petr ; Koštial, Rostislav (referee) ; Dvořák, Petr (advisor)
The main objective of this thesis is to design multicopter with very high flight endurance compared with commonly achieved performances. The beginning is devoted to description of the commonly used terms and components on multicopters with MTOW up to 20kg. This part is followed by detecting dependencies of parameters between themselves from parametric analysis commercially available platforms. Subsequently are investigated factors affecting the efficiency of the propulsion unit like motor location on the arm and the voltage of the battery. Next is done comparison in terms of efficiency of configuration with one motor per arm and two motors in coaxial arrangement. In research the coaxial configuration one part is dedicated to the determination of the efficiency at different speeds of two motors and different directions of propeller rotation relative to each other. Subsequently is determined reference characteristic for efficiency of propulsion units with different weights. Especially in connection with the next part is here shown comparison of Li-Ion and Li-Po battery. The last part is about design multicopter based on previous findings.
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Design of Handheld Anemometer
Valentová, Radka ; Rubínová, Dana (referee) ; Sládek, Josef (advisor)
This bachelor thesis deals with the design of a handheld anemometer. The main issues addressed are the ease of operation during use, the shaping for a more secure but ergonomic grip, the coherence of the shape of the anemometer in relation to the propeller and other parts. The design should meet both ergonomic and aesthetic requirements. The overall design of the shaping of the product is simple and functional. The handheld anemometer has a wide range of applications and can be used in other sectors besides sports and recreational activities.
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Unmanned aircraft powertrain characterization
Serediuk, Vadym ; Matějů, Jiří (referee) ; Dvořák, Petr (advisor)
The aim of this bachelor thesis is to recommend the most efficient electric propulsion system from the selected ones. The beginning is devoted to research in the field of electric propulsion systems and to description of their main parameters. The theoretical part is followed by a practical one, which is divided into two series of measurements. First, the performance characteristics of various motor-propeller combinations are measured. On the basis of the received data, a comparison of propulsion systems in terms of efficiency is made, the most suitable propeller-motor combination is recommended. The last part is devoted to the measurement and visualization of the airflow velocity field behind the propeller.
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Design of the propulsion unit of the competition model airplane with vertical take-off and landing
Pilát, Adam ; Navrátil, Jan (referee) ; Hájek, Tomáš (advisor)
This bachelor’s thesis was written in order to design the propulsion system for a vertical takeoff and landing competition model airplane intended to participate in the New Flying Competition 2022. The task of the thesis was to analyze the rules of the competition and design the propulsion system. The research section includes an analysis on the competition’s rules followed by a review of the propulsion system components. In the next section, a basic analysis of the parameters of the airplane is performed for the purpose of the airplane fulfilling the competition requirements. In the last part of the thesis, a propulsion system components selection method is proposed and carried out. The output of the thesis is a propulsion system suitable for use in the designed airplane.
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Aircraft Piston Engines
Nepraš, Ondřej ; Svída, David (referee) ; Dundálek, Radim (advisor)
This thesis is focused on the overview of aircraft piston engines. Attention is devoted to known, nontraditional or other interesting construction types of aircraft piston engines largely from period of Second World War. This paper looks at the historical development of aircraft engines and propellers, and is followed by a detailed description of the piston engine design. The detailed description will form the main focus of the thesis. This will cover the main requirements and differences of aircraft piston engines types. Particular engines were selected, described and technical data was given.
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