The present invention relates to a control method in case of engine failure of a hybrid helicopter having a power plant connected to at least one lift rotor and to at least one propeller, said lift rotor having a plurality of first blades and said at least one propeller having a plurality of second blades. The method comprises the following steps: (i) measuring a forward speed of the hybrid helicopter, (ii) on condition that said forward speed is greater than a first speed threshold and that each engine has failed, automatically implementing a first emergency piloting mode comprising a step for automatic reduction by an automatic piloting system of a pitch of said second blades toward an objective pitch making said at least one propeller produce a motive power which is transmitted to the lift rotor.

The present invention relates to a control method in case of engine failure of a hybrid helicopter having a power plant connected to at least one lift rotor and to at least one propeller, said lift rotor having a plurality of first blades and said at least one propeller having a plurality of second blades. The method comprises the following steps: (i) measuring a forward speed of the hybrid helicopter, (ii) on condition that said forward speed is greater than a first speed threshold and that each engine has failed, automatically implementing a first emergency piloting mode comprising a step for automatic reduction by an automatic piloting system of a pitch of said second blades toward an objective pitch making said at least one propeller produce a motive power which is transmitted to the lift rotor.

A flight stick cockpit simulator ground station system is provided. The system includes a base. The system also includes a yoke control module connected to the base. Further, the system includes a yaw control module connected to the base. Additionally, the system includes a throttle control module connected to the base. The system also includes a manipulator module for an aerial TUC transmitter for remote controlled aircraft connected to the base and configured to receive inputs from the yoke control module, the yaw control module, and the throttle control module and structured to mechanically control the aerial R/C transmitter without the need for electrical or computerized mechanisms.

A compact electromechanical decoupler device is operatively connected between a manual control device of an aircraft and an electromechanical actuator that controls the flight modes of the aircraft. The electromechanical decoupler device is operable to decouple the operative connection between the manual control device and the electromechanical actuator with the absence of power supplied to the electromechanical decoupler device. The electromechanical decoupler device can recouple the operative connection between the manual control device and the electromechanical actuator on resupply of power to the electromechanical decoupler device and on manually achieving proper rotational alignment or indexing between the mechanical control device and the electromechanical actuator.

Two methods of combining multiple response types into a single flexible command model are provided and include receiving a pilot stick input, generating an aircraft response to the pilot stick input that is a continuous blend of response types by including calculable time-varying coefficients set as a function of a magnitude of the pilot stick input and other aircraft states such as airspeed, imposing at least an angular acceleration command limit and using other non-linear elements to optimize the aircraft response to the pilot stick input.

An aircraft control of the rudder bar type, which includes a box-shaped pedal, a support, a first rotation shaft connecting the pedal to the support with a first rotation axis, a first pivot connection configured to allow the pedal to pivot about the first rotation axis relative to the support, a rod, a second rotation shaft, distinct from the first rotation shaft and connecting the pedal to the rod with a second rotation axis, and a second pivot connection configured so as to allow the pedal and/or the rod to pivot about the second rotation axis.

A pitch control system configured to vary a pitch angle of at least one of a plurality of propeller blades of a propeller system is provided including a switch movable between a neutral position and a plurality of non-neutral positions. Movement of the switch to a first non-neutral position generates a command to move the propeller blades in a first direction. Movement of the switch to a second non-neutral position generates a command to move the propeller blades in a second direction. Movement of the switch to a third non-neutral position generates a command to move the propeller blades to a zero thrust position.

A control system for controlling at least one propeller of a compound rotorcraft, the control system generating a control order for collectively controlling a pitch of the blades of at least one propeller. According to the disclosure, the control system comprises: a first piloting control for generating a first control setpoint; a second piloting control for at least generating a second control setpoint different from first control setpoint; and a control unit configured to generate control order depending on the first control setpoint and second control setpoint, the control unit implementing a control law generating the control order as a function of first control setpoint and the second control setpoint.

A control system for controlling at least one propeller of a compound rotorcraft, the control system generating a control order for collectively controlling a pitch of the blades of at least one propeller. According to the disclosure, the control system comprises: a first piloting control for generating a first control setpoint; a second piloting control for at least generating a second control setpoint different from first control setpoint; and a control unit configured to generate control order depending on the first control setpoint and second control setpoint, the control unit implementing a control law generating the control order as a function of first control setpoint and the second control setpoint.

A pitch control system configured to vary a pitch angle of a plurality of propeller blades of a propeller system is provided including a motor having a motor shaft configured to rotate about an axis. A rotary switch having a tab protruding generally outwardly is coupled to the motor shaft and is configured to move between a first position and a second position. The pitch control system also includes a position sensor configured to monitor the position of the rotary switch. The position of the rotary switch is proportional to the pitch angle of the plurality of propeller blades.