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F. Helmchen, A. Hupfer
Unlike commercial airliners, which are almost exclusively powered by turbofan engines, light fixed-wing aircraft apply a variety of different propulsion systems. This market segment has long been dominated by General Aviation for individual usage and sports, for which operational efficiency is a subordinated requirement. As upcoming novel approaches on air commuting services and personal air vehicles arose, also the interest in efficient propulsion systems for engines below the regional prop segment increases. The choice of a specific propulsion system is a major design decision as it predetermines fundamental performance characteristics and thereby the application capabilities of an aircraft concept. This contribution does not point on simply replacing conventional propulsion systems, but to use novel technologys characteristics in the most useful and practical way. Therefore, identifying and describing the rationales of current aircraft designs can facilitate the development and evaluation of novel propulsion systems. This article developed a systematic approach on propulsion system requirements to describe limitations on current technology engines, but also to identify potentials of upcoming propulsor systems powering light fixed-wing aircraft. In a first step, requirements on light aircrafts powerplant and propulsion system were reviewed and identified based on parameters of early aircraft design studies in the General Aviation segment. In a second step, this contribution applies these requirements and analyzes specification data of common light fixed-wing aircraft and their powerplants statistically. The established database consisted (primary) of General Aviation aircraft and their corresponding engines. The large majority is powered by piston, turboprop or turbofan engines. The results showed that the predominant propulsion and powerplant systems do not only differ in their limitations to the mission envelops or the specific fuel burn, but that a variety of requirements such as the powerplants frontal area, as well as maintenance cost and intervals influence the engine choice.
Deutscher Luft- und Raumfahrtkongress 2021
Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn, 2021
21,0 x 29,7 cm, 10 Seiten
Stichworte zum Inhalt:
General Aviation, Requirements on Propulsion, New Propulsion Systems
Helmchen, F.; Hupfer, A. (2021): Requirements and Challenges for the Next Generation of Light Fixed-Wing Aircraft Propulsion Systems. Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V.. (Text). urn:nbn:de:101:1-2021091715221876106849.