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.

The helicopter

Engineering & Transportation

Gen. Hollingsworth Franklin Gregory

Transportation

A.S. Barnes and Co.

See the best price to sell, buy, or rent books by Gen. Hollingsworth Franklin Gregory. BookScouter helps to compare book prices from 25+ online bookstores and 30+ buyback vendors with a single search.

Books by Gen. Hollingsworth Franklin Gregory

See the best price to sell, buy, or rent books by Gen. Hollingsworth Franklin Gregory. BookScouter helps to compare book prices from 25+ online bookstores and 30+ buyback vendors with a single search.

The helicopter