Wing models with curved (cambered) airfoil sections tested by Samuel Langley on a whirling arm at the Smithsonian Institution, circa 1893.
Transferred from the Smithsonian Institution to the United States National Museum.
Country of Origin: United States of America
Rotor/Propeller: 22.9 x 4.4 x 3.8cm (9 x 1 3/4 x 1 1/2 in.)
Airfoil section, possibly used on Langley whirling arm. Round base has male fitting. Appears to be companion piece to catalog number A19820676000.