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Preliminary Design of a Small Two Seat Helicopter
Junas, Milan ; Rozehnal,, Dalibor (referee) ; Petrásek, Miloslav (advisor)
The thesis deals the preliminary draft of the small two-seat helicopter with a piston engine. The aim of the thesis is not to propose a helicopter across the extent of the problems. Therefore we have chosen only selected issues which can be managed in the range of work. The introduction is focused on defining the general requirements imposed on proposed helicopter, formulating the basic conceptual and structural design according to the building regulation the relevant category. These ranges create a based assumption for right evaluation of the statistical analysis of the helicopters of the same or very near parameters category. Subsequently, there were defined the basic parameters of the proposed helicopter which make possible to solve the performance characteristics in the vertical and backward flight. The work is also focused on design of the rotor head of main rotor for the proposed helicopter, the definition of load acting on the rotor head, waving analysis and calculation of centrifugal forces acting on the main rotor blades. The design of the rotor head and also the helicopter as a whole will be graphically processed in the program Dassault Systemes Catia.
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Design proposal of the 12U CubeSat structure
Kopecký, Matěj ; Lazar, Václav (referee) ; Junas, Milan (advisor)
CubeSat-y jsou v dnešní době velmi populární téma díky své ceně a jednoduchosti. Jejich použití se v poslední době ubírá spíše směrem ke komerční sféře trhu, kde vzniká velké množství společností poskytující široké spektrum služeb pro mise CubeSat-ů. Jednou z těchto společností je i Výzkumný a zkušební letecký ústav (VZLÚ), který nedávno zahájil vývoj série struktur CubeSat-ů o velikosti 1U – 3U. Tato závěrečná práce je zpracována ve spolupráci s VZLÚ. Práce je zaměřena na vytvoření informační platformy, zahrnující průzkum trhu a následující konstrukci včetně její pevnostní kontroly, struktury CubeSat-u o velikosti 12U jakožto pokračování v rámci dalšího vývoje série struktur o velikosti 6U – 12U.
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Overview of the dwvelopment of new reusable space vehicles
Rohánek, Jan ; Junas, Milan (referee) ; Daněk, Vladimír (advisor)
This thesis focuses on the development of reusable space vehicles. The introduction describes history of cosmonautics. Next chapter talks about history of Space Shuttles and then names and compares the most import projects of USA and USSR. Next topic of this thesis is about problematics of reusable rocket carriers. Last chapter names and describes today´s projects of new space shuttles. The conclusion consists of overall assessment and forecast of future reusable space vehicles development.
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Overview of principles of landing gear door actuating
Rajnštajn, David ; Junas, Milan (referee) ; Mališ, Michal (advisor)
This thesis relates to airplane nose landing gear doors. It is divided into two main parts. At first, there it is put an overview of recent construction layouts at different airplane types. The second part is devoted to particular aircraft EV-55 Outback produced by Czech company Evektor. The aim of this work is to suggest adjustments and changes to current configuration, trying to make the mechanism open and close the door during the extension of the nose landing gear, with respect to the recent state of the fuselage and minimal changes to it.
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Comparative study of hot water system with photovoltaic and photothermal panels
Junas, Milan ; Tuhovčák, Ján (referee) ; Fišer, Jan (advisor)
The main topic of this bachelor thesis is to compare two methods of water heating that use to the energy acquired by solar photovoltaic and photothermal method for heating. Both systems are in thesis compared in terms of technical, financial and operational performance. As a basis for comparison will serve a photothermal system installed on a family house, which is inhabited by a three-member family. According to the analysis conducted energy consumption for water heating and data PVGIS computational model was created and a photovoltaic system was built, which consists of specific components so as to be able to replace an existing photothermal system and provide much-needed energy for water heating in the family house. Subsequently, a financial comparison of different systems was carried out, from which it is clear that an appropriate choice for the family house is also due to falling prices the photovoltaic system. The PV system prevails not only financially, but also on the difficulty of installation, number of components, the actual maintenance and operating performance.
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Design proposal of the 12U CubeSat structure
Kopecký, Matěj ; Lazar, Václav (referee) ; Junas, Milan (advisor)
CubeSat-y jsou v dnešní době velmi populární téma díky své ceně a jednoduchosti. Jejich použití se v poslední době ubírá spíše směrem ke komerční sféře trhu, kde vzniká velké množství společností poskytující široké spektrum služeb pro mise CubeSat-ů. Jednou z těchto společností je i Výzkumný a zkušební letecký ústav (VZLÚ), který nedávno zahájil vývoj série struktur CubeSat-ů o velikosti 1U – 3U. Tato závěrečná práce je zpracována ve spolupráci s VZLÚ. Práce je zaměřena na vytvoření informační platformy, zahrnující průzkum trhu a následující konstrukci včetně její pevnostní kontroly, struktury CubeSat-u o velikosti 12U jakožto pokračování v rámci dalšího vývoje série struktur o velikosti 6U – 12U.
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Overview of principles of landing gear door actuating
Rajnštajn, David ; Junas, Milan (referee) ; Mališ, Michal (advisor)
This thesis relates to airplane nose landing gear doors. It is divided into two main parts. At first, there it is put an overview of recent construction layouts at different airplane types. The second part is devoted to particular aircraft EV-55 Outback produced by Czech company Evektor. The aim of this work is to suggest adjustments and changes to current configuration, trying to make the mechanism open and close the door during the extension of the nose landing gear, with respect to the recent state of the fuselage and minimal changes to it.
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|
|
Overview of the dwvelopment of new reusable space vehicles
Rohánek, Jan ; Junas, Milan (referee) ; Daněk, Vladimír (advisor)
This thesis focuses on the development of reusable space vehicles. The introduction describes history of cosmonautics. Next chapter talks about history of Space Shuttles and then names and compares the most import projects of USA and USSR. Next topic of this thesis is about problematics of reusable rocket carriers. Last chapter names and describes today´s projects of new space shuttles. The conclusion consists of overall assessment and forecast of future reusable space vehicles development.
|
|
|
Preliminary Design of a Small Two Seat Helicopter
Junas, Milan ; Rozehnal,, Dalibor (referee) ; Petrásek, Miloslav (advisor)
The thesis deals the preliminary draft of the small two-seat helicopter with a piston engine. The aim of the thesis is not to propose a helicopter across the extent of the problems. Therefore we have chosen only selected issues which can be managed in the range of work. The introduction is focused on defining the general requirements imposed on proposed helicopter, formulating the basic conceptual and structural design according to the building regulation the relevant category. These ranges create a based assumption for right evaluation of the statistical analysis of the helicopters of the same or very near parameters category. Subsequently, there were defined the basic parameters of the proposed helicopter which make possible to solve the performance characteristics in the vertical and backward flight. The work is also focused on design of the rotor head of main rotor for the proposed helicopter, the definition of load acting on the rotor head, waving analysis and calculation of centrifugal forces acting on the main rotor blades. The design of the rotor head and also the helicopter as a whole will be graphically processed in the program Dassault Systemes Catia.
|
|
|
Comparative study of hot water system with photovoltaic and photothermal panels
Junas, Milan ; Tuhovčák, Ján (referee) ; Fišer, Jan (advisor)
The main topic of this bachelor thesis is to compare two methods of water heating that use to the energy acquired by solar photovoltaic and photothermal method for heating. Both systems are in thesis compared in terms of technical, financial and operational performance. As a basis for comparison will serve a photothermal system installed on a family house, which is inhabited by a three-member family. According to the analysis conducted energy consumption for water heating and data PVGIS computational model was created and a photovoltaic system was built, which consists of specific components so as to be able to replace an existing photothermal system and provide much-needed energy for water heating in the family house. Subsequently, a financial comparison of different systems was carried out, from which it is clear that an appropriate choice for the family house is also due to falling prices the photovoltaic system. The PV system prevails not only financially, but also on the difficulty of installation, number of components, the actual maintenance and operating performance.
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