Wilbur Ravel Kimball
Wilbur Ravel Kimball (January 28, 1863 – July 30, 1940) was an early aviator and pioneer of helicopter design. He was a member of the Aeronautic Society in New York City. He was also a member of the Early Birds of Aviation.
Wilbur Ravel Kimball (January 28, 1863 – July 30, 1940) was an early aviator and pioneer of helicopter design. He was a member of the Aeronautic Society in New York City. He was also a member of the Early Birds of Aviation.