Even wafer-thin layers of dirt have a major impact. If dirt accumulates on the blades of aircraft turbines, this means more kerosene consumption, additional emissions and a shorter service life for expensive components. Scientists at Darmstadt University of Applied Sciences have therefore been successfully researching new environmentally friendly and time-saving engine washing processes with Lufthansa Technik AG for years. The latest research project by mechanical engineering professor Gerald Ruß has developed a new type of cleaning process for the hot gas section, i.e. the combustion chamber and turbine, of civil aircraft. The project, which is funded by the Federal Ministry of Economics, is currently being prepared for a patent application.