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All the World's Rotorcraft
Provides pictures and background from the first designs to current machines. Also offers dictionary and links to related resources.
Blueghost Green
History of this helicopter cavalry troop from the Vietnam War era of helicopters.
Helicopter History
A brief history of the evolution of helicopters.
Helicopter History Site
This site traces the evolution of rotary wing aircraft back to Leonardo Da Vinci.
Helicopter Museum
Unique collection of helicopters along with volunteers working on the restoration of the aircraft.
Helicopters and Autogiros 1939 to 1945
Aviation history in the WWW: Index of aircraft by category and time period.
Igor I. Sikorsky Historical Archives, Inc.
Dedicated to acquiring, preserving and protecting the historical materials that chronicle the aviation careers of Igor Sikorsky, the companies he founded and the accomplishments of its employees.