Patent ID: 6481965
Filing Date: 2002-11-19
Classification: B64C,B64D

Abstract:
A rotary-wing aircraft rotor, comprising:a hub, designed to be driven in rotation about an axis of the hub which is the axis of rotation of the rotor, at least two blades, each of which is connected to the hub by a link member that is substantially radial with respect to the axis of rotation, and having a radially outer end shaped like a fork in which the corresponding blade has a root held by two blade pins substantially parallel with each other and each one traversing aligned bores in the fork and the blade root, at least one blade being foldable on one side of the rotary wing aircraft rotor and having at least one detachable blade pin, such that the withdrawal of said detachable pin from the blade root and from the fork of the link member, after withdrawing at least a first detachable member for retaining said detachable blade pin in said fork, allows the pivoting of said blade about the other pin forming a blade pivot pin, and an electrical connection installation comprising, for each blade, at least one electrical connecting cable connecting a first connector, carried by the hub and electrically connected on the hub, to a second connector on the blade and connected to at least one electrical equipment of said blade, wherein the connecting cable, for at least one foldable blade, comprises a first flexible section, of essentially cylindrical shape with a rounded cross section, connecting said second connector to a first end, in a radially outer position, of a second section, held on the corresponding link member, of said connecting cable, whose first section comprises a releasable part which, in the flight configuration of the blade, is maintained above the detachable blade pin by holding means tied to said detachable blade pin, and is also detachable to be able to be withdrawn before the folding of the blade, said holding means being arranged in such a way as to allow a manual release of the releasable part before their withdrawal, such that said releasable part is manually released from said holding means before their withdrawal and such that the folding of the blade by pivoting about said pivot pin causes the first section of cable to curve and move naturally in order to accommodate itself to said folding without disconnection at the level of the second connector.