U.S. Patent Specifications

For a rotative winged aircraft having a variable pitch sustaining rotor capable of effecting direct take‐off and having a landing wheel with a wheel brake, a primary pilot's control organ for controlling the direct take‐off manoeuvre, said primary control organ being adjustable between a position providing a non‐lifting rotor blade pitch angle and initiation of rotation of the rotor in preparation for direct take‐off and a position providing a direct take‐off rotor blade pitch setting, mechanism interrelating the operation of said primary control organ and the wheel brake and providing for application of the wheel brake upon adjustment of the control organ to lower the blade pitch and initiate rotation of the rotor prior to take‐off and for release of the wheel brake upon adjustment of the primary control organ to effect direct take‐off, and separately controllable means for applying the wheel brake independently of the primary control organ.