Patent ID: 7594796

Claim:
A rotorcraft rotor blade ( 1 ) having at least one tiltable trailing-edge flap ( 5 ), said flap ( 5 ) being suitable for pivoting about a virtual hinge axis (Y′) extending substantially in the span direction of said blade ( 1 ) and of said flap ( 5 ), wherein said flap ( 5 ) includes at least two fastener ball joints ( 30 ) each provided with an inner cage ( 32 ) together with an outer cage ( 33 ) and a first pin ( 31 ) secured to said flap ( 5 ), said blade being provided at its trailing edge (BF) with a fastener tongue ( 20 ) provided with ball-receiving sockets ( 21 ), said outer cages ( 33 ) of the fastener ball joints ( 30 ) being secured to said ball-receiving sockets ( 21 ), wherein said first pin ( 31 ) of each fastener ball joint ( 30 ) is perpendicular to said virtual pivot axis (Y′) of said flap ( 5 ).