Kaman Ka-225 Bu. No. 125477 at NASM, first turbine helicopter Published on December 16, 2012 in 11 December 1951Full resolution (1609 × 1300) ← Previous Next → Kaman K-225, Bu. No. 125477, the first gas turbine-powered helicopter, at the Vertical Flight Gallery, Steven F. Udvar-Hazy Center, Smithsonian Institution National Air and Space Museum, Chantilly, Virginia. (NASM)