A rotor blade assembly for providing vertical lift to an aircraft, having a rotor head and a plurality of blades, with each blade attached to a mechanism such as a cam surface, whereby movement of the mechanism causes the radial distance between the distal tip of the attached blade and the center of the rotor head to alter, decreasing or increasing the length of the lifting surface. The blades are moved from a fully extended position providing maximum lift, to a retracted position in which the blades are removed from the airstream. The pitch of the blades may be controlled by a pitch controller to achieve full helicopter responsiveness. A plurality of bladeletts may be positioned near the outer periphery of the rotor head. When they are moved into the airstream, passing air impacts the bladeletts exerting a pressure, causing rotational movement of the rotor blade assembly.
RETRACTABLE LIFTING BLADES FOR AIRCRAFT
EINZIEHBARE HUBSCHAUFELN FÜR FLUGZEUG
PALES DE PORTANCE RETRACTABLES POUR AERONEF
2019-12-11
Patent
Electronic Resource
English
IPC: | B64C AEROPLANES , Flugzeuge |
Retractable End Plates for Aircraft Lifting Surfaces
NTRS | 1985
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