Design and testing of a winglet airfoil for low-speed aircraft

Mark D. Maughmer, Timothy S. Swan, Steven M. Willits

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


The Pennsylvania State University (PSU) 94-097 airfoil has been designed for use on winglets of high-performance sailplanes. The design problem is difficult because the airfoil must operate over a wide range of Reynolds numbers, and this range includes values that are relatively low. To validate the design tools, as well as the design itself, the airfoil was tested in the Penn State Low-Speed, Low-Turbulence Wind Tunnel from Reynolds numbers of 2.4 × 105 to 1.0 × 106. In addition to free-transition measurements, potential drag reductions using artificial turbulators were explored, although the benefits were found to be limited for this application. Finally, performance predictions from two well-known computer codes are compared to the data obtained experimentally, and both are found to generate results that are in good agreement with the wind-tunnel measurements.

Original languageEnglish (US)
Pages (from-to)654-661
Number of pages8
JournalJournal of Aircraft
Issue number4
StatePublished - 2002

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering


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