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Human powered airplanes overview
Valuch, Tomáš ; Koštial, Rostislav (referee) ; Zikmund, Pavel (advisor)
In this bachelor thesis is elaborated historical development of human-powered aircrafts. The aim is to asses an overview of human-powered aircraft, to evaluate trends in the airframe structure and evaluate trends of specific design parameters. The first part deals with the historical development of the aircrafts. The next part focuses on the description of Kremer‘s prices and their importance for the development of this aircraft category. The following describes the structural components of the airframe and structural parameters. These parameters and flight performance are assessed. The last section is devoted to future developments and accomplishments records.
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Flight performance of racing RC gliders
Hájek, Tomáš ; Zikmund, Pavel (referee) ; Pejchar, Jan (advisor)
Bachelor thesis is about flight performance of category F3K, radio-controlled gliders. It has list of flight tasks performed during competition and characteristics of different flight modes. The paper presents important performance characteristics and the methodology for their measurement.
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Airfoils Evolution and Summary
Kerndl, Jindřich ; Dofek, Ivan (referee) ; Zikmund, Pavel (advisor)
This bachelor thesis describes the evolution and overview of airfoils. The first part is about the airfoil characteristics and their significance. The second part reflects the historical evolution of airfoils for piston engine powered aircraft. The conclusion compares the airfoils of currently used light sport aircraft of Czech and foreign producers.
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Integration of XFOIL software in MATLAB environment
Křižák, Michal ; Zikmund, Pavel (referee) ; Dofek, Ivan (advisor)
Thesis is concerned with program which is able to run and control XFOIL from MATLAB environment. This program is focused on bulk data processing and plotting of XFOIL results. Thesis is also concerned with brief description of XFOIL and MATLAB, description of profile characteristics and comparison numbers used in calculation by XFOIL.
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Aircraft speed Measurement
Mokoš, Marian ; Jebáček, Ivo (referee) ; Zikmund, Pavel (advisor)
The Bachelor´s thesis is focused on the measurement of flight especially the speed of the aircraft. The first part includes the list of aircraft on-board instruments, measurement errors and the types of speeds. The principle of an aircraft speedmeters and the list of probes subdivided by measuring the speed of flight are mentioned. The second part is focused on unmanned aerial vehicle SPECTO and choosing the appropriate probe for this aircraft.
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Gliders in Today's Aviation
Schoř, Pavel ; Zikmund, Pavel (referee) ; Šošovička, Róbert (advisor)
The introduction of this bachelor`s thesis deals with a brief history of gliders. Second chapter explains basic principles of unpowered aircraft flight, including the principle, how an unpowered glider can climb. Commonly used take-off methods are also mentioned. In all chapters, the examples are explained on Standard Cirrus glider, because it is very widespread in Czech Republic and is financially well affordable. Third chapter describes natural principles, which are used by glider pilots to gain an altitude. An extra attention is paid to gaining an altitude in thermals. In fourth chapter, the gliders are divided according to their purpose and sporting category. Short description of glider construction is mentioned, including a description of instruments, which are necessary for a cross country flight. The description of cross country flight is mentioned at end of this chapter. Last chapter compares Standard Cirrus glider with SZD 56-2, which is one of the today`s best 15m gliders. The main purpose is to illustrate the progress in glider designing, which was achieved during last 40 years, in the light of previous chapters.
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Survey of Competition Aircraft of Aero L-159 Alca
Bartoněk, Jaroslav ; Zikmund, Pavel (referee) ; Dofek, Ivan (advisor)
This bachelor‘s thesis deals with military training and lightweight multi-role continuation trainers which are comparable with the Aero L-159 ALCA. Here, a survey of the most important airplanes is created, of their using, technical data, historical development and mutual comparison based on their flight performances and other properties. Aero L-159 ALCA is the latest construction of training and multi-role aircraft of the company Aero Vodochody and the successor of the traning airplane L-39 Albatros.
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Police activity as an IZS unit in finding ammunition with specialization in aerial bombs in inhabited areas.
ZIKMUND, Pavel
It's been almost 70 years since the end of the worst military conflict of all times, the World War II, during which millions of people died. It is a sad fact that it still causes casualties even today. The problem lies in thousands of different pieces of munitions located throughout Europe. The biggest problem is posed by unexploded aerial bombs that have in recent years took its toll on bomb disposal experts as well as other people. The problem of aerial bombs are mainly American and British origin, which bear long-term mechanical - chemical igniter. The design of these igniters does not allow their simple unscrewing from the body itself, and even the handling of these aerial bombs may cause its explosion and the threat to all persons located in its vicinity. Even in our country can be found these air bombs with this type of igniter. This thesis deals with the possibilities of such a disposal with regard to economic and technological possibilities of the Czech Police bomb disposal experts. Therefore, research was conducted with a focus on how best to dispose of aerial bombs. Bomb disposal experts were approached to give their professional opinions. A part of the research was the study of foreign literature dealing with this issue. The sad fact is that this problem is not satisfactorily resolved anywhere in Europe. Abroad, various methods were used as appropriate, such as using high pressure water cutting or blasting the use of special keys. As demonstrated by accident in 2010 when in German Göttingen three bomb disposal experts died in liquidation of aerial bombs using high-pressure cutting, this method and similar have proven to be inappropriate. The preparation of these special methods takes an excessively long time, and in many cases the bomb requires manipulation. Bomb disposal experts of the Czech Republic along with other experts are developing and improving the explosive separation method using a special explosive (ammunition). The most appropriate seems the use of long flexible bomb explosive: RAZOR made by a Czech company - VÚPCH Pardubice - Semtín. The explosive is attached to the body of the bomb either on its perimeter or in the axis of the bomb and this leads to the separation of the lighter or pull out the body of the lighter without explosion of the body of the bomb. Practical experience shows that the use of this special method can reduce time to prepare bomb disposal and the handling of the bomb is minimal or none. Unfortunately, there is always a risk that there will be accidental explosion of aerial bombs and therefore is imperative to comply with all safety measures to the maximum extent possible.
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