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Provides pictures and background from the first designs to current machines. Also offers dictionary and links to related resources.
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History of this helicopter cavalry troop from the Vietnam War era of helicopters.
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This site traces the evolution of rotary wing aircraft back to Leonardo Da Vinci.
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Aviation history in the WWW: Index of aircraft by category and time period.
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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.
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