Vversion of the Chinese top.
Credit - Gary Bradshaw; "To Fly Is Everything"
1845 design for a helicopter by Cossus
Mr. Bright designed and patented this apparatus.
Advancing the idea suggested by Launoy.
Credit - Hiller Aviation Museum
Aerial screw machine worked by steam
Penaud's flying screw
Credit - Wright State University
Apparatus powered by a gunpowder motor
The invention of Dieuaide
This design by Melikoff in 1877.
This design of Castel in 1878.
Forlanini's steam-powered apparatus.
Trouve's arial screw and electric motor.
Cayley drew up plans for aerial carriage
Cayley's design in "On Aerial Navigation."