A fragrance dispensing system for an aircraft that includes a fuselage defining a cabin interior and an environmental control system (ECS). The ECS includes a source of air that moves air between the source of air and the cabin interior along an airflow path, a mixer unit in airflow communication with the source of air and positioned downstream from the source of air in the airflow path, at least a first air duct positioned in the airflow path between the mixer unit and the cabin interior, and a fragrance dispensing unit positioned between the air source and the cabin interior along the airflow path. The fragrance dispensing unit is configured to dispense at least a first fragrance into the airflow path.

An aircraft humidification system includes a first duct configured to guide a first air stream, and a second duct configured to guide a second air stream, the second duct including a humidifier for humidifying the air stream in the second duct. The humidification system further includes a first conduit for directing part of the second air stream to the first duct. The first conduit includes a first conduit inlet leading into the first duct and a first conduit outlet extending from the second duct. A second conduit directs part of the first air stream to the second duct, the second conduit including a second conduit inlet leading into the second duct and a second conduit outlet extending from the first duct. The first conduit outlet is arranged downstream of the humidifier, the second conduit inlet is arranged downstream of the first conduit outlet, and the first conduit inlet is arranged downstream of the second conduit outlet.

In some examples, a computing device is configured to monitor an air quality of a vehicle cabin by at least receiving, from a plurality of remote sensors distributed throughout the cabin, signals indicative of one or more air quality parameters for air in the cabin. Based on the received signals, the computing device can determine if values for the one or more air quality parameters are indicative of an air quality event and generate an output in response to such a determination. The output may include, for example, an audio or visual indication of the air quality event or a signal to control another system of the aircraft to take action to remedy the air quality event.

A control terminal for controlling an unmanned aerial vehicle (UAV) includes a processor and a storage medium storing instructions that, when executed by the processor, cause the processor to render an image on a user interface of the control terminal. The image is captured by an imaging device coupled to the UAV and is associated with a view of the imaging device. The instructions further cause the processor to detect, via the user interface, a gesture-based input including one or more reference points in the image and indicating a view change of the imaging device, determine a type of the gesture-based input by analyzing the one or more reference points, and generate control data based on the type of the gesture-based input to control at least one of the UAV or the imaging device for the view change of the imaging device.

An environmental control system for providing conditioned air to a volume of an aircraft includes a ram air circuit including a ram air shell with at least one heat exchanger positioned therein. A dehumidification system is arranged in fluid communication with the ram air circuit and at least one compressing device is arranged in fluid communication with the ram air circuit and the dehumidification system. A plurality of mediums is receivable within the environmental control system. A first medium of the plurality of mediums is provided from the volume of the aircraft via at least one valve.

A transportation system that includes one or more pods that include an interior space configured to house one or more travelers. The pods can be attached to and transported by multiple different vehicles. The different vehicles can provide for different modes of transportation. The pods are configured to supply one or more utility functions to the interior space. One or more of the utility functions to be supplied from the vehicles to the pods when the pods are attached to the vehicles.

A gas turbine engine system includes, in serial flow communication, an engine compressor configured to compress air, a combustor in which the compressed air is mixed with fuel and ignited to generate a stream of combustion gases, and a turbine configured to extract energy from the combustion gases. An electric generator is configured to be driven by the turbine and generate electric energy during use. An electric motor is configured to be driven by electric energy generated by the electric generator. The electric motor is configured in use to drive the engine compressor.

In some examples, a heat exchanger includes an outer shell defining an open cavity configured to receive heat exchanger core components. The heat exchanger core components may include a layer of hot passageway components configured to be separated from a layer of cold passageway components by a tube sheet. In some examples, the outer shell defines one or more alignment features on an inner wall of the open cavity, the one or more alignment features being configured to align the heat exchanger core components within the open cavity when inserted in the open cavity. The heat exchanger further comprises a cover configured to be attached to the outer shell via one or more braze joints to enclose the core components within the open cavity of the outer shell.

A fuel oxygen reduction unit assembly for a fuel system is provided. The fuel oxygen reduction unit assembly includes: a fuel oxygen reduction unit located downstream from the fuel source and defining a stripping gas flowpath and a liquid fuel flowpath, the fuel oxygen reduction unit comprising a means for transferring an amount of oxygen from a liquid fuel flow through the liquid fuel flowpath to a gas flow through the stripping gas flowpath; and an oxygen conversion unit in flow communication with the stripping gas flowpath configured to extract a flow of oxygen from a gas flow through the stripping gas flowpath, the oxygen conversion unit defining an oxygen outlet configured to provide the extracted flow of oxygen to an external system.

A compressed air conduit can have a cross-sectional area, and a valve, the valve having at least one arm being deployable laterally into the cross-sectional area of the conduit to restrict flow within the conduit.