Abstract: An aircraft jet engine includes an exhaust-gas nozzle having a device configured to blow out an exhaust gas in a pulsating manner into an exhaust-gas stream so as to reduce noise. The exhaust-gas nozzle includes openings distributed along a circumference of the exhaust-gas nozzle and disposed upstream from a nozzle outlet. The openings communicate with the device.

Abstract: An aircraft jet engine includes an exhaust-gas nozzle having a device configured to blow out an exhaust gas in a pulsating manner into an exhaust-gas stream so as to reduce noise. The exhaust-gas nozzle includes openings distributed along a circumference of the exhaust-gas nozzle and disposed upstream from a nozzle outlet. The openings communicate with the device.

Abstract: An adaptive flow body is provided whose profile can be adapted to different operating requirements regarding lift and crosswinds, flow resistance, and steering. The rear part of the flow body is divided into two rear partial profiles by a slot that penetrates from the trailing edge toward the middle part in the lengthwise direction of the flow body profile. These rear partial profiles each also have a flexible inner skin and flexible outer skins fastened continuously on the middle part. An actuator with pushing or pulling movements acts on each inner skin, which movements are transmitted by joints from the inner skin to internal structural elements which transmit these movements through rigid connections as bending moments to the outer skin.