An Overview of NASA Research on Positive Displacement Type General Aviation Engines

摘要: The research and technology program related to improved advanced general aviation engines is described. Current directed at the near-term improvement of conventional air-cooled spark-ignition piston future alternative engine systems based on all-new engines, lightweight diesels, rotary combustion that show potential for meeting goals in midterm long-term future. activities involve efforts applying existing improve fuel economy, investigation key processes permit leaner operation reduce drag, development cost effective flight high-altitudes where economy safety are improved. concepts include conceptual design studies enabling critical or items.