

The hub axle seal's primary function is to keep the axle lubricated. The lubricant, often a type of grease or oil, is crucial for reducing friction between moving parts. Without proper lubrication, the components can suffer from overheating and excessive wear, potentially leading to significant damage and costly repairs. Additionally, the seal prevents water and dirt from entering the axle assembly, which can cause rust and corrosion, further jeopardizing the integrity of the axle.
Another advantage of aircraft drum brakes is their ability to maintain a consistent performance in varying environmental conditions. They are less susceptible to the effects of debris and water compared to disc brakes, which can lead to reduced performance due to slippage. This robustness makes drum brakes preferable for certain types of aircraft, particularly older models and smaller general aviation planes.