CODE13. ABSTRACT (Maximum 200 words)The Volpe National Transportation System Center's Environmental Measurement and Modeling Division (Volpe Center), is supporting the FAA in implementing its Next Generation Air Transportation System (NextGen) Program. The objective of the NextGen Program is to design and implement an air transportation system capable of accommodating an expected tripling in required capacity over the next 25 years. As part of this initiative, the Volpe Center participatedin a study to determine the potentialfuel saving and noise reductionbenefits of installing experimental spiroidwinglets on an aircraft.