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Item System for early identification of local atmospheric changes in flight(University of Zilina, 2021) Dvorský, Richard; Pecho, PavolPaper “System for early identification of local atmospheric changes in flight” is aimed at creating a model of a new variant of instrumentation of non-powered aircraft by monitoring air parameters such as air temperature, static pressure and air humidity. We will use modern technologies to create this theis. This created device will work in the search for thermal currents. After next research as a tool in powered aircraft where it will function as a system for identifying local atmospheric changes that are dangerous for flight itself. Another possible use will be in transport aircraft to predict turbulenceItem Experimental state of tensile testing of aircraft reciprocating internal combustion engine(University of Zilina, 2021) Mrva, Matúš; Pecho, PavolThe main goal of the Paper "Experimental state of tensile tests of aircraft piston internal combustion engine" is to create an experimental and fully functional measuring stand for monitoring the parameters of a model internal combustion piston engine, using different types of propellers. The partial goals are the creation of a teaching aid, the construction of a unique facility and the creation of opportunities for research and development in this area by other students. Using a measuring device, it was possible to record the various operating characteristics of the internal combustion engine. Based on this, the usability of individual propellers for the measured internal combustion engine can be determined.Item Design and construction of a UAV device with a fixed wing for the conditions of rescue services(University of Zilina, 2021) Petrík, Nikolas Michael; Pecho, PavolThe paper is focused on comprehensive design of an unmanned aerial vehicle with fixed wing, which would add efficiency to specific activities performed by rescue services. The current rapid development of unmanned aerial vehicles is slowly becoming part of many industries around the world. The aim of this paper is to design an unmanned aerial vehicle that could provide safe, reliable, and efficient operation. The overall design, construction, and installation of the proposed unmanned aerial vehicle should integrate several modern technologies. To make an ideal design of unmanned aerial vehicle it is required to possess the knowledge of current construction methods of additive manufacturing, understanding of legislation in operating conditions and, in addition to general knowledge of unmanned vehicles, also comprehensive skills in programming and configuration of autonomous control elements of autonomous unmanned systems. After the production of the unmanned aerial vehicle with fixed wing, very good technical properties were demonstrated during experimental ground tests. Achieved technical properties are comparable to those owned by the unmanned aerial vehicles that are currently on the market. The final design configuration using an infrared-sensitive optical device could perform activities such as: searching for missing persons in hard-to-reach and vast terrain or searching for forest fires.Item Construction of a reactive engine intended for measurement of thrust characteristics and efficiency of selected aviation fuels(University of Zilina, 2021) Sitár, Matej; Pecho, PavolThe content of the research consists in the approach and interpretation of pulsejet engines as simple devices that are able to produce thrust. Relevant information about the principle of operation, the process of manufacturing a pulse engine, together with knowledge about fuels, which are subjected to research focused on the production of thrust, provide the design of a functional valveless pulsejet engine type "Lockwood". The pulsejet engine is designed to measure the thrust characteristics and efficiencies of selected aviation fuels, and its construction is the main goal, which also provides insight into a comprehensive solution to the problem. Experiments focused on fuel research, have become the main motivation for our work, which in addition to theoretical knowledge also captures the factual solution to the problem in its practical part. Thework describes a specific procedure for the construction of a pulsejet engine, but also a description of by-products of this process, in the form of a metal stationary base and the implementation of various functional components into the structure. The results of the experiments represent important outputs of the work, which clarify the values of thrust, which the engine produced when propelled by selected fuels and at the same time provide inspiration for the implementation of other similar research.Item Assessment of aircraft coating resistance to lighting strikes(University of Zilina, 2021) Sudin, Matúš; Pecho, PavolThe paper evaluates the damage caused by lightning strikes on various types of aircraft coatings, the extent of the damage and the evaluation of technical and economic factors. The aim of the work is to evaluate and compare the damage after lightning strikes on metallic and non-metallic coatings of aircraft and to find out which coatings are more advantageous from a technical and economic point of view for use in practice. In the introductory part, the work describes the current state, the coating of aircraft, their function and application and the phenomenon when the aircraft is struck by lightning. Subsequently, the work deals with selected coatings and briefly describes them. The main part describes all parts of the performed experiment, samples and technical equipment used for the experiment and compares the damage on selected types of coatings. The last part of the work deals with the evaluation of results, based on which it evaluates the technical and economic advantages anddisadvantages.Item Analysis of implementation instrument approaches for hems heliports(University of Zilina, 2021) Posluch, Samuel; Pecho, PavolIn recent years, the trend of using a helicopters in the operation of the helicopter emergency medical service (HEMS) has been increasing. The reason is the wide range of uses of the helicopter, fast and safe transport of wounded people using new copters. Nevertheless, it is not possible to operate flights in poor weather conditions with a sufficient number of interventions. There is a need to develop new procedures for flying even under conditions other than VFR flight rules. The current state of helicopter technology in Slovakia allows it and therefore it is appropriate that new procedures using GNSS be created to establish a safe flight. The aim of the analysis is to evaluate the input factors available to the operator and to create a design approach based on the legislative requirements for the use of GNSS systems on the selected heliport. The resulting approach design can be used as one of the options for creating procedures. Such proposals could also be implemented on other operational bases, for the creation of a network of instrument approach or departure systems, which would create space for increasing the safety of helicopter emergency medical service in Slovakia.Item NÁVRH IMPLEMENTÁCIE SENZOROV SYSTÉMU ARDUINO V MODELI DEMONŠTRAČNÉHO VETERNÉHO TUNELA(Žilinská univerzita v Žiline, 2020) Rilko, Dávid; Pecho, PavolThe intention of the paper is to acquaint the reader with the basics of aerodynamics and to clarify the theory of wind tunnels, their division, construction, functionality and today´s use. The work also documents the construction proces of a wind tunnel, which took place on Žilina Airport with cooperation with employees of the Department of Air Transport and its students. The work captures the process of tunnel design until its completion. The main point is the design of the wind tunnel measuring system. The work thoroughly explains the procedure for designing, connecting, programming and calibrating measuring elements and creating an overall system for measuring data for a closer understanding of aerodynamic events. The conclusion of the work is a comparison of the measuring system used in construction and the systems used in world research centres from a technical as well as an economical point of view.Item SYSTÉM MERANIA AERODYNAMICKÝCH SÍL V DEMONŠTRAČNOM VETERNOM TUNELI(Žilinská univerzita v Žiline, 2020) Veľký, Patrik; Pecho, PavolThe purpose of the article was to solve a part of the wind tunnel, specifically part of the measurement of wind forces. The work deals with the mechanism by which it is possible to determinate the values of bouyancy, downforce and drag of the object, which is attached to the system. The work takes into account the conditions under which the mechanism had to be constructed. Selection of suitable material due to price and quality, dimensional conditions, method of measuremnt system itslef and output from the mechanism. In addition to the design itself, the scope of work also included a summary of the current state in the field of aerodynamics and wind tunnels, an analysis of current requirements for the operation of wind tunnels and a final summary from a technical and economic point of view. At the beginning of the work are summarized the basics of general aviation and the importance of aerodynamics associated with it. The second part of the work is a wind tunnel, its importance for aviation and then its design and construction of a functional mechanism for measuring the required parameters. Due to the fact that the wind tunnel was built by students and employees of the University, the work includes its own practical experience.Item NÁVRH A KONŠTRUKCIA MODELU DEMONŠTRAČNÉHO AERODYNAMICKÉHO TUNELA(Žilinská univerzita v Žiline, 2020) Hrúz, Michal; Pecho, PavolThe paper is focused on the creation of a fully functional demonstrational model of a subsonic wind tunnel with integrated accessories, using low air velocities to perform test analyses. The analyses take place in the form of visual demonstrations of the air flow behavior around various solids and also in the form of computational tasks. The paper describes the use of theoretical knowledge and laws in the field of aerodynamics and their subsequent connection to the design and construction of the model, while its dimensions must meet the strict requirements for subsequent placement. The demonstrational model provides the necessary equipment for research in the aerospace and, in part, automotive industries. It provides conditions for student research and fully covers the teaching processes of Air Transport Department.Item VPLYV NEHOMOGÉNNOSTI POVRCHU VPD 13/31 NA BRZDNÉ ÚČINKY LIETADLA NA LETISKU V BRATISLAVE(Žilinská univerzita v Žiline, 2020) Krnáč, Dominik; Pecho, PavolThe paper deals with the problem of braking effects. It is essential to thoroughly analyze the current state and cause of the problem. In this case it is a partially reconstructed RWY 13/31, which during the measurement of braking effects shows significantly lower braking coefficients in the reconstructed part and in general part of the new concrete appears to be inhomogeneous. Optical observations also show clear differences, for example during various meteorological phenomena. Currently, the critical part of the track is monitored and published by NOTAM as "slippery when wet". The current situation is not optimal at all, as during the winter period the critical part of the RWY may show significantly lower braking performance and thus be dangerous to flight operations. Furthermore, RWY analysis in terms of structure is included. In the experimental part, there are measured the braking effects on the track and are compared with the effects measured before CB plates replacement. At the end there is proposed a measure to improve the properties and its technical evaluation.