Systems and methods for aircraft brake cooling are described. A system may include an air hose configured to intake pressurized air at a first end of the air hose from an aircraft propulsor. A nozzle at a second end of the air hose may be configured to exit the pressurized air through the air hose to a braking system. An actuator may be configured to allow the pressurized air to flow through the air hose or prevent the pressurized air from flowing through the air hose.

Systems and methods for aircraft brake cooling are described. A system may include an air hose configured to intake pressurized air at a first end of the air hose from an aircraft propulsor. A nozzle at a second end of the air hose may be configured to exit the pressurized air through the air hose to a braking system. An actuator may be configured to allow the pressurized air to flow through the air hose or prevent the pressurized air from flowing through the air hose.

A system is provided for energy recovery. The system includes a heat recovery unit. The heat recovery unit is configured to receive at least one of heat or steam from a methanization reactor operating to convert carbon dioxide (CO.sub.2) and supplied hydrogen (H.sub.2) via methanization to produce methane (CH.sub.4), generate energy using at least one of the heat or the steam from the methanization reactor, and supply the generated energy to at least one of a carbon/carbon (C/C) preform production process, a separator, or another system.