TechAlert — (Research Reports)

Advanced propfans were selected to be used throughout the family of commuters. These propulsion systems offer a 25 to 28 percent fuel savings over comparably sized turbofans operating in the 1990s. A brief study of the propulsion systems available for the family of commuters is provided and the selection of the advanced turbo‐props justified. The propeller and engine designs and performance are discussed. The integration of these designs is examined. Also addressed are the noise considerations and constraints due to propfan installation. PL 66pp.