Brake cooling system

A brake cooling system, comprising:

• a pressurized air source configured to supply compressed air;
• a flow passage extending from the pressurized air source to a vicinity of a brake assembly;
• the flow passage having an outlet directing supplied compressed air towards the brake assembly, at least one de Laval nozzle provided in the flow passage, wherein the de Laval nozzle increases the speed and reduces the temperature of compressed air that is passed from the pressurized air source and through the de Laval nozzle;
• a valve configured to control the fluid communication between the pressurized air source and the de Laval nozzle, wherein when the valve is closed compressed air is prevented from reaching the de Laval nozzle and when the valve is open compressed air is allowed to pass to and through the de Laval nozzle;
• and
• at least one temperature sensor configured to sense the temperature of a brake assembly;
• wherein sensing by the temperature sensor that the temperature of the brake assembly is above a predefined limit causes the valve to become opened so that compressed air is passed from the pressurized air source through the de Laval nozzle and out through the outlet of the flow passage to the brake assembly in order to bring down the temperature of the brake assembly.