Aerodyne Research helped plan and execute a ground breaking study of emissions from an airplane using sustainable aviation fuel (SAF) in collaboration with Gulfstream, FAA, NASA, and Missouri University of Science and Technology (MS&T). While a number of SAF studies have been performed in the past, this was the first to avoid contamination of the fuel with sulfur from fossil fuels used by the fuel handling equipment to load the fuel on the airplane. This resulted in a fuel that was sufficiently sulfur free that new effects were seen that had not been observed before. These results demonstrate the potential to improve local air quality near airports as well as the possible benefits of reducing the formation of contrails.