Helo - Helicopter's History Site, Helicopter History Site,

		Friday, 5 September, 2008
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Helicopter's History Site (Popularity: )

Traces the evolution of rotary wing aircraft back to Leonardo da Vinci, with many photographs.
Category: Science\Aeronautics and Aerospace\Aviation

Helicopter History Site (Popularity: )

This site traces the evolution of rotary wing aircraft back to Leonardo Da Vinci.
Category: Science\Technology\Aerospace\Aeronautics

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