Abstract: The invention relates to a device (3) for simultaneously interlocking a plurality of actuators (1) by means of a first locking element (5) which is assigned to each final control element (2) of an actuator (1) and which interacts with a second locking element (6). The second locking element is fixed inside the housing (4) in an actuating direction of the final control element (2) and is displaced into an interlocking position by spring force and into an unlocking position by an assisting force. The invention provides that a plurality of second locking elements (6) are interconnected and are actuated by a common device (11). As a result, the variety of parts, the safety risk, the weight, and the constructional complexity are reduced which is very important especially when the inventive device is used in helicopter.

Abstract: A helicopter with rotor blades rotatably connected to a rotor head. The rotor head is non-rotatably connected with a rotor mast (1) pivoted in a transmission housing and driven by a transmission via at least one driving mechanism. A pitch of the rotor blades, relative to a plane of rotation of the rotor blades, is controlled via a swash plate, control rods (12) and via individual actuators (9) allocated to each individual rotor blade. The control rods (12) and the actuators (9) are mounted in the rotor mast (1) and the rotor head and those components act, via a mixing lever (11) and a control rod (8), upon a pivoted arm (7) which adjusts the pitch of the rotor blade. The control devices of the rotor blades do not interfere with the air flow, are affected only to a limited extent by centrifugal forces and additional stresses, and are also protected against influences of the weather.