National Repository of Grey Literature 26 records found  beginprevious21 - 26  jump to record: Search took 0.00 seconds. 
Propfan engines in civil aviation transportation
Polák, Andrej ; Klement, Josef (referee) ; Šplíchal, Miroslav (advisor)
Bachelor thesis is written in the search form and discusses propfan aircraft engines. After introducing the concept itself, the first part deals with the principle functioning of engines and propulsion efficiency. The second part briefly describes the construction of these engines with a focus on specific parts of propfan engines differentiating concept from other aircraft engines. Then summarizes the features of these engines, describes their advantages and disadvantages and the possibilities of eliminating disadvantages. Finally briefly describes the history of the development of propfan engines.
Použití speciálních kotoučů u rozmítacích pil
Železný, Antonín
Circular saw blades are the most common woodworking tools in wood practice. This thesis describes the mechanical instability of saw blades and consequently their noise. When modificating saw blades it is possible to avoid partially these problems and achieve the maximum cutting quality and productivity. The thesis also examines the impact of the noise on human body and proposes measures designed to reduce noise of the saw blades. In the experimental part of the study we are solving the impact of the speed, the type of gearing, feed speed and type of wood swept noise level and frequency of the disc wheels oscillation.

National Repository of Grey Literature : 26 records found   beginprevious21 - 26  jump to record:
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