Transferred from the Smithsonian Institution to the United States National Museum.
Airfoil section used on Langley whirling arm. Symmetrical curve with maximum thickness of 1 inch (2.5 cm) at center. Made up of two pieces with flat bottom glued together. Tapers to knife-edge at both leading and trailing edges of airfoil and a preservative coating. Other Mataerials: Adhesive, Mylar (Polyester)