Cierva-Weir 'autodynamic' rotor system demonstrated

Friday, March 15, 1935



The system enabled the rotor blades to automatically reduce blade pitch during start-up (due to the orientation of the lag hinge) so that the rotor could be easily over-sped before quickly increasing pitch to effect a jump take-off. The rotor was installed on a Cierva C.30 Autogiro.

Source: AHS History Calendar 2012


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