Patent ID: 9229449
Filing Date: 2016-01-05
CPC Classification: G05D

Claim Text:
1. Method for aiding the formulation of the speed strategy of an aircraft using a flight management system comprising: a. defining a time constraint associated with a required time of arrival of the aircraft using the flight management system at a constraint point (RTA); b. periodically calculating an estimated minimum time of arrival (ETAmin) corresponding to the minimum time at which the aircraft can reach the constraint point; c. periodically calculating an estimated maximum time of arrival (ETAmax) corresponding to the maximum time at which the aircraft can reach the constraint point; d. when the required time of arrival is greater than  defining a first target required time of arrival (RTA target) between the required time of arrival and ETA max; e. when the required time of arrival is less than  defining a first target required time of arrival (RTAtarget) between the required time of arrival and ETAmin; f. using the first target required time of arrival for the formulation of the aircraft's speed strategy to increase the available margin of manoeuvre with a view to the formulation of future speed strategies.