Abstract: An air conditioning pack management system for controlling distribution of a predetermined amount of conditioned air from a system comprising two or more air conditioning packs, the pack management system comprising a management unit arranged to proportion the predetermined amount of conditioned air to be provided by one or more of the two or more packs based on the respective operating efficiencies of the packs or other pre-selected metrics.

Abstract: An aircraft environmental control system includes a bleed air input and a RAM air input, heat exchanger means for receiving bleed air from the bleed air input and RAM air from the RAM air input and using the RAM air to cool the bleed air, and ejector arranged to receive bleed air from the bleed air input at a nozzle shaped to reduce the pressure of the received bleed air such as to create a low pressure area in the ejector. The ejector has a port arranged such that ambient air is drawn into the ejector due to the low pressure area in the ejector. The ambient air is mixed with bleed air to provide mixed air that is further pressurised and conditioned and combined with the cooled bleed air provided to the aircraft.

Abstract: A brake cooling system of the present disclosure includes an external cooling apparatus located externally from an aircraft (e.g., available on the ground at the gate during parking of the aircraft). The external cooling apparatus is in electronic communication with the aircraft via a communication channel such that the external cooling apparatus receives live data from the aircraft for intelligent aircraft brake cooling. The live data includes measured brake temperature. The brake cooling system further includes a controller for collecting aircraft data and generating a cooling apparatus control signal.