The present invention falls within the scope of soundproofing structures for aircrafts, typically existing in airports or any infrastructures for aircrafts. For testing and servicing of an aircraft, the latter must be placed under extreme conditions, which generate high noise in its vicinity. This invention is aimed at insulating the noise of aircrafts of any size, by expanding an existing expandable installation.

It is therefore the object of the present invention an expandable soundproofing structure for aircrafts, comprising at least one front barrier (1) and two side barriers (2), wherein each side barrier (2) extends in a given direction and is arranged in such a way towards one of the ends of the front barrier (1) that the angle formed between each side barrier (2) and the front barrier (1) is greater than 90 and the free ends (3) of each one of the side barriers (2) are suitable to be expanded.

The present invention falls within the scope of soundproofing structures for aircrafts, typically existing in airports or any infrastructures for aircrafts. For testing and servicing of an aircraft, the latter must be placed under extreme conditions, which generate high noise in its vicinity. This invention is aimed at insulating the noise of aircrafts of any size, by expanding an existing expandable installation.

It is therefore the object of the present invention an expandable soundproofing structure for aircrafts, comprising at least one front barrier (1) and two side barriers (2), wherein each side barrier (2) extends in a given direction and is arranged in such a way towards one of the ends of the front barrier (1) that the angle formed between each side barrier (2) and the front barrier (1) is greater than 90 and the free ends (3) of each one of the side barriers (2) are suitable to be expanded.

A total air temperature sensor includes a probe head, a strut, and a turbulence inducing surface. The probe head has an airflow inlet and an airflow outlet. The strut defines a leading edge and an opposed trailing edge extending along a longitudinal axis, and connects between the probe head and an opposed probe mount. The turbulence inducing surface is defined in the strut aft the leading edge. The turbulence inducing surface is configured to trip a fluid boundary layer passing over the strut to transition from laminar to turbulent for moving flow separation toward the trailing edge to reduce acoustic noise emission from the total air temperature sensor.

A total air temperature sensor includes a probe head, a strut, and a turbulence inducing surface. The probe head has an airflow inlet and an airflow outlet. The strut defines a leading edge and an opposed trailing edge extending along a longitudinal axis, and connects between the probe head and an opposed probe mount. The turbulence inducing surface is defined in the strut aft the leading edge. The turbulence inducing surface is configured to trip a fluid boundary layer passing over the strut to transition from laminar to turbulent for moving flow separation toward the trailing edge to reduce acoustic noise emission from the total air temperature sensor.

a test bench for turbomachine comprising: an installation zone for turbomachine; an active system for attenuating the noise emissions produced by the turbomachine. The active system includes an attenuation zone with emitters such as loudspeakers; a first microphone placed downstream of the turbomachine; and a second microphone placed downstream of the attenuation zone. The system reduces the turbomachine waves on the basis of the measurements from the first microphone and from the second microphone. The invention also proposes a method for attenuating the noise emissions from the turbomachine tested in the test bench.

The exemplary embodiments provide a system of selectively moving airplanes on an airport apron. Airplanes are selectively moved from selective parking locations to areas adjacent to take-off locations such as runways. Airplanes may also be selectively moved from an area of the apron adjacent to a landing location and/or to a parking location. This may include for example an unloading location, an airport terminal, a servicing location, a fueling location, storage location and/or other suitable location. The exemplary system includes driving channels through which a carriage is selectively moved. The carriage includes a basket for operatively engaging at least one front wheel of selected airplanes for purposes of transporting such airplanes to and between the desired locations.

The present invention provides a water-cooled flue gas collecting apparatus disposed in a flow path formed inside a wake treatment structure for cooling and discharging flue gas generated from a test propulsion system. The water-cooled flue gas collecting apparatus includes a gas guiding portion having a flue gas inlet at one end through which the flue gas enters, a gas pipe connected to the flue gas inlet at one end to pass through the other end of the gas guiding portion and form an extension at the other end, and a collecting portion connected to the other end of the gas pipe to collect the flue gas entering through the gas pipe from the flue gas inlet. According to the present invention, the apparatus may be used in rocket propulsion systems of various sizes and allows quantitative analyses.

The present invention provides a water-cooled flue gas collecting apparatus disposed in a flow path formed inside a wake treatment structure for cooling and discharging flue gas generated from a test propulsion system. The water-cooled flue gas collecting apparatus includes a gas guiding portion having a flue gas inlet at one end through which the flue gas enters, a gas pipe connected to the flue gas inlet at one end to pass through the other end of the gas guiding portion and form an extension at the other end, and a collecting portion connected to the other end of the gas pipe to collect the flue gas entering through the gas pipe from the flue gas inlet. According to the present invention, the apparatus may be used in rocket propulsion systems of various sizes and allows quantitative analyses.

The exemplary arrangements provide a system of selectively moving airplanes on an airport apron. Airplanes are selectively moved from selected parking locations to areas adjacent to take-off locations such as runways. Airplanes may also be selectively moved from an area of the apron adjacent to a landing location to a parking location. This may include for example an unloading location, an airport terminal, a servicing location, a fueling location, storage location and/or other suitable location. The exemplary systems include driving channels through which a carriage is selectively moved. The carriage is in operative connection with a basket for operatively engaging at least one front wheel of selected airplanes for purposes of transporting such airplanes to and between the desired locations.

The exemplary arrangements provide a system of selectively moving airplanes on an airport apron. Airplanes are selectively moved from selected parking locations to areas adjacent to take-off locations such as runways. Airplanes may also be selectively moved from an area of the apron adjacent to a landing location to a parking location. This may include for example an unloading location, an airport terminal, a servicing location, a fueling location, storage location and/or other suitable location. The exemplary systems include driving channels through which a carriage is selectively moved. The carriage is in operative connection with a basket for operatively engaging at least one front wheel of selected airplanes for purposes of transporting such airplanes to and between the desired locations.