Patent ID: 9623958
Date: 2017-04-18
CPC Classifications: B64C,B64D,Y02T

Claim:
1. A method for controlling an aircraft propeller system during thrust reversal, wherein the propeller system includes at least two power plants, each power plant having a variable-pitch propeller and an engine for the propeller to drive the same, the method for controlling an aircraft propeller system comprising the steps of: checking whether each power plant is ready for a transition to negative pitch, and informing a flight control system of a detected positive readiness condition of any one of the at least two power plants; receiving a thrust reversal order in the flight control system; checking, in the flight control system, the readiness condition of the at least two power plants for the transition to negative pitch, and controlling the propellers transition to negative pitch from the flight control system, when the at least two power plants are ready for the transition to negative pitch, the flight control system instruct the aircraft propeller system to reverse thrust, wherein the aircraft propeller system includes a power plant control system for each power plant, and wherein data is exchanged between each power plant control system and the flight control system, for instructing the aircraft propeller system to reverse thrust, and wherein the flight control system simultaneously sends a reverse thrust instruction to both power plants control systems.