ROTOR BLADES OF A LIFT ROTOR

A foldable rotor blade (152, 153) comprises a hinge element (173; 240) defining two hinge axes arranged in parallel, and two blade segments (171, 172) each coupled to the hinge element (173; 240) for hinging with respect to a respective one of said hinge axes. The rotor blade has an extended condition in which the blade segments are substantially aligned with each other; the rotor blade has a folded condition in which each blade segment is hinged with respect to the hinge element so that the blade segments are substantially parallel to each other. The blade has a cord (14) and said hinge axes are substantially parallel to the chord. The blade segments have upper surfaces which in the folded condition are facing each other, and which in the extended condition are flush with each other and the intermediate hinge element. 一种可折叠转子叶片(152,153)，包括由两个平行布置的铰链轴限定的铰链元件(173；240)，以及两个叶片部(171,172)，每个叶片部均与铰链元件(173；240)连接以使其相对于所述各自的铰链轴转动。转子叶片具有伸展状态，在该伸展状态所述叶片部基本彼此对齐；转子叶片具有折叠状态，其中每个叶片部相对于铰链元件转动，以便叶片部基本上彼此平行。叶片具有绳索(14)，并且所述铰链轴