Patent ID: 6695253
Filing Date: 2004-02-24
Classification: B64C

Abstract:
A method of folding/unfolding at least one blade of a multi-bladed rotor of a rotary-wing aircraft, with at least a first blade being connected to a hub of the rotor by a coupling comprising a pivotal connection defining a pivot axis and a releasable connection, release of which allows its blade to be pivoted about its pivot axis between an unfolded position and a folded position, the method comprising steps:(a) removably attaching at least one variable-length linear actuator to the first blade and a second blade, each locked in a fixed position with respect to the hub which is itself locked stationary; (b) releasing the first blade from its fixed position with respect to the hub; (c) actuating the linear actuator to vary its length and bear against the second blade, thereby pivoting the first blade about its pivot axis to a new position with respect to the hub; and (d) locking the first blade in the new position.