Arlington Sisu 1A at the Steven F. Udvar-Hazy Center
Leonard Niemi's Sisu is the most successful American competition sailplane ever flown. The Arlington Sisu 1A is on display at the Smithsonian's National Air and Space Museum's Steven F. Udvar-Hazy Center.
Image Number: 2005-24789a
Credit: Image by Eric Long, National Air and Space Museum, Smithsonian Institution
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