The Boeing Company

United States of America As Represented by the Administrator of Nasa

Ronen Elkoby

Alan Eugene Bruce

Leonard J Hebert

Eric H Nesbitt

Russell H Thomas

Michael J Czech

Trevor Craig Blanarik

Mark Yee

Thomas E Alston

Methods and systems to develop routes for an aircraft to travel through an airspace. The system includes interface circuitry to receive one or more objectives and one or more constraints for the routes. Processing circuitry is configured to optimize the routes based on one or more of the input parameters. The processing circuitry is configured to: generate a set of routes that each comprise a different flight path through the airspace; rank the routes in the set based on how each of the routes dominates the other routes based on the one or more objectives and constraints; maintain dominant routes in the set and eliminate dominated routes from the set based on the rankings; generate additional dominant routes based on the one or more objectives and constraints; and supplement the set with the additional dominant routes.

Methods and systems for creating a set of routes for an aircraft to travel through an airspace

The aircraft exhaust engine nozzle system includes a fan nozzle to receive a fan flow from a fan disposed adjacent to an engine disposed above an airframe surface of the aircraft, a core nozzle disposed within the fan nozzle and receiving an engine core flow, and a pylon structure connected to the core nozzle and structurally attached with the airframe surface to secure the engine to the aircraft.

Aircraft engine exhaust nozzle system for jet noise reduction

An arcuate or semi-circumferential shield in the shape of a visor that is adapted to be secured to an external surface of a nozzle housing of a jet nozzle to attenuate jet noise generated by the jet nozzle. The shield may be fixedly secured to the nozzle housing or movably supported so that it can be moved between retracted and deployed positions. When used as a fixedly mounted component, or when positioned in its deployed position, a downstream edge of the shield extends past a downstream edge of the nozzle housing and the shield is spaced apart from an outer surface of the nozzle housing to form a channel therebetween. The shield is preferably orientated at approximately a bottom dead center of the nozzle housing. The shield operates to attenuate jet installation noise, and particularly jet installation noise experienced during the takeoff phase of flight of a jet aircraft, as well as to reduce jet installation noise that would otherwise propagate forwardly toward the cockpit of the aircraft.

Jet nozzle having noise attenuating shield and method therefor

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Los Angeles, CA, United States of America

Ronen Elkoby