The future of fl ying Flying after the pandemic Yes but only in more energy effi cient and sustainable ways than before That s the name of the game for policymakers and the aviation industry and a number of interesting concepts exist to support these goals Flying but greener that s what the future of avi ation has to look like There s no other option con sidering the current footprint of air travel on the global climate Airline CEOs and policymakers agree on this point The aviation industry has com mitted to cutting its net CO2 emissions in half com pared to 2005 by 2050 Scientists say that 2050 is too late and are pressing for change by 2030 Air travel accounts for 3 5 percent of human induced global warming according to an international study led by Manchester Metropolitan University with participation of the German Aerospace Cen ter DLR and others that was published in Septem ber 2020 and provides the most comprehensive insight into the climatic impact of aviation to date CO2 emissions which have been the key metric for the environmental impact of aviation account for only one third of it whereas other eff ects ac count for two thirds of the climatic impact of air craft Nitrogen oxide NOX emissions at altitudes below 12 000 meters 39 000 feet promote the undesirable formation of ozone Undesirable be cause ozone does not block UV rays in these lay ers of the atmosphere but like CO2 has the eff ect of a greenhouse gas On the other hand depend ing on weather conditions soot particle emissions as cloud condensation nuclei contribute to cloud By Andreas Spaeth The fuselage shape of the Flying V is energy effi cient 20 compared to an Airbus A350 and provides ample room for space fi lling hydrogen tanks formation in the form of the generally known con trails among other things These clouds refl ect thermal radiation from the Earth and therefore con tribute to global warming as well In this article we present some interesting ideas of how aircraft and their propulsion systems might become more environmentally friendly going for ward and which sustainable energy sources could be tapped for this purpose 12

Vorschau Schaeffler tomorrow 02-2021 EN Seite 12
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