The brake drum, or ‘cake tin’ as you might often hear it referred to, provides a thermal enclosure for the brake assembly so that the airflow isn’t overly influenced by the wheel rim.
With the F1 car brakes are similar to normal road cars, only they are made with different materials and operate under considerably... There's more... operating at temperatures near 1000 degrees Celcius, this can be a fire hazard. Air ducts are designed to supply air to cool the brakes while the car is moving, and when it is stationary, you will see the crew use custom blowers to move air through the brake system. In hot climates, Teams use cooling fans to keep all aspects of the car cool, from the engine to the brakes and the... There's more... is added to aid the cooling.