Reverse tactile cue for rotorcraft rotor overspeed protection

A method, comprising:

• determining a rotor revolutions per minute (RPM) for a rotor of an aircraft by a flight control computer (FCC) that is of an aircraft and that is in signal communication with a collective trim assembly and that is further in signal communication with one or more flight control devices that are of the aircraft and that are operable to control flight of the aircraft according to a received flight control device control signal;
• determining, by the FCC, in response to a relationship between the RPM and an RPM threshold indicating a rotor overspeed condition, a flight parameter associated with reducing the rotor RPM according to the RPM threshold;
• determining, by the FCC, a pilot control setting according to the flight parameter;
• generating, by the FCC, a rotor pitch set command according to the pilot control setting and sending the rotor pitch set command to a trim assembly connected to a pilot control of the aircraft, the rotor pitch set command causing the trim assembly to attempt to move a pilot collective control stick according to the rotor pitch set command and to generate a rotor pitch position signal indicating a position of the pilot control, wherein the trim assembly attempting to move the pilot collective control stick provides a tactile response to a pilot indicating the overspeed condition, and wherein the attempt to move the collective control is overridable through manual control by the pilot;
• generating, by the FCC, a flight control device control signal according to the rotor pitch position signal;
• and
• sending, by the FCC, the flight control device control signal to the one or more flight control devices.

A method, comprising:

• monitoring, by a flight control computer (FCC) that is of a rotorcraft and that is configured to provide main rotor overspeed protection, sensor signals indicating a main rotor revolutions per minute (RPM) for a main rotor of the rotorcraft;
• determining a target operating parameter;
• determining one or more flight parameters in response to a relationship between the main rotor RPM and the target operating parameter indicating a main rotor overspeed condition, wherein the determining the one or more flight parameters includes determining a setting for one or more flight control devices of the rotorcraft that changes the main rotor RPM;
• controlling positioning of one or more pilot controls according to the flight parameters, wherein the controlling the position of the one or more pilot controls comprises causing a trim motor of the rotorcraft to attempt to move a pilot collective control stick to a position associated with the setting for the one or more flight control devices, wherein the trim motor attempting to move the pilot collective control stick provides a tactile response to a pilot indicating the overspeed condition, and wherein the attempt to move the collective control to the first position is overridable through manual control by the pilot;
• and
• controlling the one or more flight control devices of the rotorcraft according to the positioning of the one or more pilot controls.