A variable-section nozzle for an aircraft nacelle includes a deformable portion of which is movable between a narrow section position and a wide section position. In particular, the variable-section nozzle includes piezoelectric actuators and a controller to control the piezoelectric actuators in order to displace the deformable portion between the narrow and wide section positions. The piezoelectric actuators can be disposed on at least one faces of the deformable portion or be disposed end-to-end to form actuating rods.

Systems and methods for expanding an operating speed range of a high speed flight vehicle include providing an engine with an inlet air duct, and positioning a heat exchanger in the inlet air duct to cool at least a portion of duct air flow associated with an engine core. Additionally or alternatively, a nozzle assembly includes a cowl fluidly communicating with the engine and having a cowl internal surface defining a cowl orifice, and a plug defines a primary thrust surface. The plug is supported relative to the cowl so that a portion of the primary thrust surface is disposed within the cowl orifice to define a throat therebetween. An actuator is coupled to at least one of the cowl or the plug, and is configured to generate relative movement between the cowl and the plug, thereby to modify the throat.

A variable section nozzle includes an ejection casing and a plurality of internal flaps arranged in a ring downstream from the ejection casing. Each internal flap is connected to the ejection casing by a movable lever pivotally mounted to the downstream end of the ejection casing. Each lever is movable between a first position in which the internal flaps are in a high position and a second position in which the internal flaps are in a folded-down position. The nozzle includes a plurality of rigid movement transmission parts distributed circumferentially around the ejection casing. Each rigid movement transmission part is connected to two adjacent levers by connecting rods, and to a control actuator. Each rigid movement transmission part can move in a direction corresponding to the axial direction of the nozzle under the action of the control actuator to move the adjacent levers between the first and second positions.

A linkage comprises a drive ring, a flap linkage mounted to each of a multiple of flaps and the drive ring, and an actuator system which drives the drive ring to cause the multiple of flaps to pivot. A method of driving a multiple of flaps is also disclosed.

A variable section nozzle includes an ejection casing and a plurality of internal flaps arranged in a ring downstream from the ejection casing. Each internal flap is connected to the ejection casing by a movable lever pivotally mounted to the downstream end of the ejection casing. Each lever is movable between a first position in which the internal flaps are in a high position and a second position in which the internal flaps are in a folded-down position. The nozzle includes a plurality of rigid movement transmission parts distributed circumferentially around the ejection casing. Each rigid movement transmission part is connected to two adjacent levers by connecting rods, and to a control actuator. Each rigid movement transmission part can move in a direction corresponding to the axial direction of the nozzle under the action of the control actuator to move the adjacent levers between the first and second positions.

The present disclosure provides a turbojet engine nacelle having a downstream section including a cowl which is ended with a hinged flap constituting a nozzle. In particular, the hinged flap is hingedly and translatably hinged to the cowl.