The Helicopter
- 223pages
- 8 heures de lecture
Hardcover 1976 223p. 12.50"x9.75"x0.80" The Army's First Helicopter; Futher Developments; Here it,fly it; The GYROPLANE; Eyes for the big Guns; Back to the NACA; The Army's first rotary-wing-aircraft School; The army's Second helicopter and more. Many pictures.