Patent attributes
An aircraft navigational system for a multiengine aircraft can include a flight planning module configured to receive two or more navigational points defining a route and determine if a first degraded operation ceiling is high enough to travel along the route based on obstacle data defining relative location of one or more obstacles and one or more obstacle clearance standards. The module can be configured to receive a status and/or performance limitation of an electric motor system of the aircraft. The module can be configured to determine if the electric motor system is or will be able to provide temporary additional power to produce a second degraded operation ceiling for at least a required time based on the status and/or performance limitation of the electric motor system if the first degraded operation ceiling is not high enough to permit travel along the route. The second degraded operation ceiling can be high enough to travel along the route based on the obstacle data and the one or more obstacle clearance standards.
