Patent ID: 7585151
Filing Date: 2009-09-08
Classification: B64C,Y02T

Abstract:
1. A rotorcraft rotor blade ( 1 ) having at least one trailing edge flap ( 5 ) that is tiltable, said flap ( 5 ) being suitable for pivoting about a virtual hinge axis (Y′) extending substantially along the span of said blade ( 1 ) and of said flap ( 5 ), wherein said flap ( 5 ) is provided with at least one main ball joint ( 30 ) having an inner cage ( 32 ) and an outer cage ( 33 ), and a first shaft ( 31 ) secured to said flap ( 5 ), the front portion ( 33 ′) of said outer cage ( 33 ) of the main ball joint ( 30 ) being connected to a linear actuator ( 10 ) that is arranged in said blade ( 1 ) and that enables said flap ( 5 ) to be pivoted, said first shaft ( 31 ) of the main ball joint ( 30 ) extending substantially perpendicularly to said virtual hinge axis (Y′) about which said flap ( 5 ) pivots, wherein said flap includes a fastener ball joint ( 39 ) having an outer cage ( 37 ) and an inner cage ( 36 ), together with a second shaft ( 35 ), the front portion ( 37 ′) of the outer cage ( 37 ) of said fastener ball joint ( 39 ) being secured to a stationary point of said blade.