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Full-Text Articles in Engineering
Evaluation Of Heat Efficiency Of Flat Solar Air Heaters, E.S. Abbasov, M.A. Umurzakova
Evaluation Of Heat Efficiency Of Flat Solar Air Heaters, E.S. Abbasov, M.A. Umurzakova
Journal of Tashkent Institute of Railway Engineers
The article discusses the issues of increasing the thermal efficiency of flat solar air collectors. To achieve the goal, the authors propose to use methods of wall intensification of heat transfer (using the diffuser-confusor channels and surfaces with spherical depressions). In the article formulas for calculating the thermal efficiency and the relative thermal performance of the collectors are developed
Solution Of Markshader Tasks Using Unmanned Aircraft Under Open Method Of Development Mineral Deposits, Sh.R. Okhunov
Solution Of Markshader Tasks Using Unmanned Aircraft Under Open Method Of Development Mineral Deposits, Sh.R. Okhunov
Gorniy vestnik Uzbekistana
The аrticle is devoted to the review of modern methods of the mineral deposits used when developing. Possibilities of modern unmanned aerial vehicles for shooting and three-dimensional modeling of surfaces are described.
Competitiveness Of Hybrid Electric Aircraft On Short Range Scheduled Flights, Johannes Anton, Hans-Joachim K. Ruff-Stahl
Competitiveness Of Hybrid Electric Aircraft On Short Range Scheduled Flights, Johannes Anton, Hans-Joachim K. Ruff-Stahl
International Journal of Aviation, Aeronautics, and Aerospace
Hybrid electric aircraft are expected to enter the small regional aircraft market within the next two decades. The aim of this study was to investigate if a hybrid electric passenger aircraft with 50 seats can be competitive against the established 100 seat aircraft on short range scheduled flights. The Embraer EMB 145 and EMB 190 regional jets were chosen as benchmarks for that market. A hypothetical hybrid version of the EMB 145 with increased fuel efficiency was tested on a cost per available seat mile (CASM) basis. The t tests confirmed significant (p < 0.05) competitiveness of the hybrid version, while in contrast the conventional 50-seater was significantly more expensive compared to the 100seat aircraft. This indicates that hybrid aircraft could enter the short haul market with a competitive advantage, even against the established 100 seat regional jets.