Patent Number: 6,168,379

Title: Helicopter rotor blade with a movable flap

Abstract: A helicopter rotor blade includes a main airfoil body (12) and a movable control flap (3) incorporated in the trailing edge profile of the airfoil body. The flap (3) is movably connected to the main airfoil body (12) by a flexibly bendable junction element (4), and is actuated by a piezoelectric actuator unit (5) via a push/pull rod (6) and a lever arm (7), whereby the control flap is deflected relative to the main airfoil body. The junction element (4) is preferably a continuous integral fiber-reinforced composite component having a flexible bending portion (42) with a reduced thickness in comparison to the adjoining portions, whereby the reinforcing fibers extend continuously through the joint in the direction of the connection between the main airfoil body and the flap.

Inventors: Bauer; Karl (Waakrichen, DE)

Assignee: Eurocopter Deutschland GmbH

International Classification: B64C 27/615 (20060101); B64C 27/72 (20060101); B64C 27/00 (20060101); B64C 003/50 ()

Expiration Date: 01/02/2018