シコルスキー S-67
1 2 3 4 Office of the Assistant Vice Chief of Staff of the Army (OAVCSA). An Abridged History of the Army Attack Helicopter Program, pp. 4–5, 9. Washington, DC: Department of the Army. 1973.
↑ Landis and Jenkins 2000, pp. 25, 85–87.
1 2 3 4 5 6 7 Apostolo 1984, p. 89.
↑ Landis and Jenkins 2000, p. 21.
1 2 Leoni, Ray. Black Hawk: The Story of a World Class Helicopter, p. 70. American Institute of Aeronautics and Astronautics, 2007. ISBN 978-1-56347-918-2.
↑ Yamakawa, et al. 1972, p. 1.
↑ US Patent: Blade for High Speed Helicopter
↑ Yamakawa, et al.