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Outline of history and comparative analysis of internal combustion engines for flying models

Pełczyński Jakub

Combustion Engines

2023

R. 62, nr 2

36--44

The article discusses the most important facts from the history of the development of miniature aircraft engines and carries out their comparative analysis. Already in the 1930s, the structural system characteristic of model engines was established, which has hardly changed to this day. The following sections compare the various types of engines: two-stroke and four-stroke engines, spark-ignition engines, glow plug engines, engines with a push-pull cylinder arrangement, radial and in-line engines. The comparisons of the parameters and operational indicators of such engines presented in the tables allowed for the assessment of the advantages and disadvantages of individual engines, making several observations and drawing some more general conclusions.

Porównawcze badania jakościowe i trwałościowe połączeń spawanych stali HARDOX 500 i stali S355

Kapcinska-Popowska D.

Journal of Research and Applications in Agricultural Engineering

2011

Vol. 56, nr 1

59-65

Artykuł przedstawia zmiany właściwości mechanicznych złącz spawanych ze stali HARDOX 500 i S355, wykonanych różnymi metodami technologicznymi. Określono również rozkład liniowy pierwiastków odpowiedzialnych za właściwości tribologiczne tych stali.

The paper presents changes of mechanical properties of welded joints ofthe HARDOX 500 and S355 steels made through different technological methods. Also the linear decomposition of the elements responsible for tribological properties of these steels is determined.