Exhaust Emission Measurements from a Spark-Ignition Engine Using Fuels with Different Ethanol Content for Aircraft Applications.

To have more sustainable aviation, ways to reduce lead and gaseous emissions are important and currently large research topics. As further efficiency improvements for internal combustion engines (ICE) have reached a limit, and the research and development of certifiable full and hybrid electric aircrafts are still ongoing, it becomes increasingly important to investigate the use of alternatives to conventional fuels, such as bioethanol. In this study, a state-of-the-art turbocharged 104 kW flight piston engine (BRP Rotax 915 iS) was tested with fuels containing various amounts of ethanol to assess the influence on the engine's performance and emissions.