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Aircraft emissions during various flight phases Pawel Glowacki, Michal Kawalec Institute of Aviation Krakowska Av. 110/114, 02-256 Warsaw, Poland Tel.: +48 22 8460011, fax: +48 22 8464432 e-mail: pawel.glowacki@ilot.edu.pl Abstract Article presents methodology of pollutants quantitative estimation emitted by turbine engines. Provides calculation results of aircraft CO2, CO and NOx effusion using fuel consumption data taken from aircraft Flight Data Recorder (FDR) in the so–called landing and takeoff cycle (LTO) and during remaining flight phases (climb from 3000 feet to cruise altitude, cruise, descent to 3000 feet) of various aircraft types. The authors would like to draw attention of the aviation professionals to the fact that amount of toxic content in the exhaust from the turbine engine is significant especially during cruise, but turbine engine emission standards are applied only to LTO cycle defined in the ICAO Annex 16 vol.2. The article gives an example of CO and NOx emission estimation based on engine performance taken from ICAO Engine Emission Data Bank. Such engine authors named “ideal”. Calculations considered in this paper contain actual values of aircraft fuel consumption and duration of the airplane maneuvers. It is cliché that engines of the same type have different performances after overhaul and during exploitation are deteriorating hence such factors has been taken into consideration in emission calculations and each aircraft, even of the same type, has been regarded individually. Calculated on the engine characteristics basis the mass flow rate of exhaust gases, and knowledge of the aircraft real LTO cycle duration allow to estimate the amount of CO2, CO and NOx “left" at the airport space. High altitude emissions especially NOx and CO2, their influence on ionosphere require more studies of climate experts. For now we are trying to estimate more precisely volume of pollutants.