Turbo engine including a system to control pitch of a propeller blade

An apparatus comprising:

• a fan pitch actuation system coupled to a blade of a propeller, the fan pitch actuation system moveable in a first direction to rotate the blade from a first pitch angle to a second pitch angle based on an amount of hydraulic fluid pumped into the fan pitch actuation system;
• an accumulator to store the hydraulic fluid;
• a valve coupled to an output of the accumulator and an input of the fan pitch actuation system, the valve to, when open provide the hydraulic fluid from the accumulator to the fan pitch actuation system based on a control signal;
• and
• a controller to:
• detect a triggering event;
• and
• based on at least one of user preferences, flight characteristics, or engine characteristics, output the control signal to open the valve based on the detected triggering event.

An apparatus comprising:

• interface circuitry to output a control signal to a valve to cause a blade of a propeller to automatically change from a first pitch angle to a second pitch angle;
• machine readable instructions;
• and
• at least one programmable circuit to at least one of execute or instantiate the machine readable instructions to at least:
• determine at least one of a flight information, engine information, or pilot preferences;
• and
• based on a triggering event, generate the control signal based on the at least one of the flight information, the engine information, or the pilot preferences.