Fuel efficient airspeed trim
AssigneeThe Boeing Company
InventorsKeith D. Parsons, Roger M. Edmark
Life of this patent
Estimating the term…
Abstract
A system and method are provided for precisely adjusting individual aircraft airspeed system in order to provide more accurate cruise Indicated Airspeed (IAS). The system includes a flight data computer, an autopilot, and airspeed displays. The flight data computer includes a first component that records in-service data to determine actual fuel mileage for the aircraft for comparison to a production rating fuel mileage. The flight data computer also includes a user interface that allows a user to set a Mach trim value based on the comparison and a third component that adjusts indicated airspeed based on the determined Mach trim value. The autopilot and airspeed displays receive the adjusted indicated airspeed.
Claims32
A method for adjusting indicated airspeed of an aircraft, the method comprising:
- determining a Mach trim value based upon a comparison of an actual fuel mileage value of the aircraft and a predetermined production rating fuel mileage;
- and
- automatically adjusting a predetermined indicated airspeed based on the determined Mach trim value.
A system for adjusting indicated airspeed of an aircraft, the system comprising:
- means for determining a Mach trim value based upon a comparison of an actual fuel mileage value of the aircraft and a predetermined production rating fuel mileage;
- and
- means for automatically adjusting a predetermined indicated airspeed based on the determined Mach trim value.
A method for adjusting indicated airspeed of an aircraft, the method comprising:
- determining actual fuel mileage for the aircraft;
- comparing the determined actual fuel mileage to a predefined production rating fuel mileage;
- setting a speed trim value based on the comparison;
- and
- adjusting indicated airspeed based on the determined speed trim value.
A system for adjusting indicated airspeed of an aircraft, the system comprising:
- means for determining actual fuel mileage for the aircraft;
- means for comparing the determined actual fuel mileage to a predefined production rating fuel mileage;
- means for setting a speed trim value based on the comparison;
- and
- means for adjusting indicated airspeed based on the determined speed trim value.
A system for adjusting indicated airspeed of an aircraft, the system comprising:
- a flight data computer including:
- a first component for determining actual fuel mileage for the aircraft;
- a second component for comparing the determined actual fuel mileage to a production rating fuel mileage;
- a user interface for allowing a user to set a Mach trim value based on the comparison;
- and
- a third component for adjusting indicated airspeed based on the determined Mach trim value;
- and
- an autopilot for receiving the adjusted indicated airspeed.
A system for adjusting indicated airspeed of an aircraft, the system comprising:
- a flight data computer including:
- a first component for determining actual fuel mileage for the aircraft;
- a second component for comparing the determined actual fuel mileage to a production rating fuel mileage;
- a user interface for allowing a user to set a Mach trim value based on the comparison;
- and
- a third component for adjusting indicated airspeed based on the determined Mach trim value;
- and
- one or more displays for receiving and presenting the adjusted indicated airspeed.
A system for adjusting indicated airspeed of an aircraft, the system comprising:
- a flight data computer including:
- a user interface for allowing a user to set a Mach trim value based upon a comparison of an actual fuel mileage value of the aircraft and a predetermined production rating fuel mileage;
- and
- a component for automatically adjusting a predetermined indicated airspeed based on the determined Mach trim value;
- and
- an autopilot for receiving the adjusted indicated airspeed.
A system for adjusting indicated airspeed of an aircraft, the system comprising:
- a flight data computer including:
- a user interface for allowing a user to set a Mach trim value based upon a comparison of an actual fuel mileage value of the aircraft and a predetermined production rating fuel mileage;
- and
- a component for automatically adjusting a predetermined indicated airspeed based on the determined Mach trim value;
- and
- one or more displays for receiving and presenting the adjusted indicated airspeed.
Dependencies are inferred from the claim text.