As the aerospace industry is moving towards the More Electric Aircraft, there is a growing demand for electrical power to feed the increasing electrical loads in the aircraft. More Electric Aircraft (MEA) and More Electric Engine (MEE) are terms that are sometimes mistakenly being used interchangeably, but that are actually very different. This paper outlines some of the issues that have been c...

1 1 ABSTRACT The success or effectiveness for any aircraft design is a function of many trade-offs. Over the last 100 years of aircraft design these trade-offs have been optimized and dominant aircraft design philosophies have emerged. Pilotless aircraft (or uninhabited airborne systems, UAS) present new challenges in the optimization of their configuration. Recent developments in battery and m...

Abstract It is envisaged that future civil aero-engines will operate with ultra-high bypass ratios to reduce the specific fuel consumption. To achieve expected benefits from new engine cycles, these powerplants may mount compact nacelles. For configurations aerodynamic coupling between powerplant and airframe increase. this reason, it required quantify further understand effects of aircraft int...

1 Institute for Energy and Powerplant Technology, Technical University of Darmstadt, Petersenstrasse 30, 64297 Darmstadt, Germany [email protected] 2 FWO – Vlaanderen (Science Foundation – Flanders); Department of Mechanical Engineering, Katholieke Universiteit Leuven Celestijnenlaan 300A, B3001 Leuven, Belgium [email protected] 3 Mathematical Sciences, Faculty EEMCS, Unive...

Abstract This study presents a methodology to estimate the battery consumption of an electric powerplant, based on brushless motors, typically used in light unmanned aerial systems. The models motors through equivalent circuit obtained from their dynamic behaviour. Propellers’ data are taken experimental database. Furthermore, variable speed controller efficiency is considered methodology. All ...

The Human Factors Analysis and Classification System (HFACS) was used to classify maintenance-related general aviation accidents in the United States from 1990 to 2000 inclusive. The analysis revealed that among the maintainers, skill-based errors were most frequent cause of accidents, followed by violations committed by both professional maintainers and owneroperators. Furthermore, violations ...

This letter report presents the result of a survey of open-literature information on the leaching characteristics of coatings used in nuclear power plants. The survey, in general, indicated a complete lack of information on leachability, leaching rate, and potential leaching constituents of nuclear-powerplant coatings. Furthermore, there has been no concerted test program to evaluate the role o...