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One of the key benefits of drum brakes is their enhanced heat dissipation capabilities. The enclosed design allows for a larger surface area to dissipate heat generated during braking, making them particularly effective in applications where braking is frequent and intense. This characteristic is especially useful during the landing phase, where an aircraft must rapidly decelerate from high speeds.
aircraft drum brakes

Another notable disadvantage is their performance in wet conditions. When exposed to water, drum brakes can diminish in effectiveness until they dry out, leading to concerns around safety. Furthermore, since they are often housed within a drum, maintenance can be more challenging, potentially leading to neglected issues.
drum and disc brake system

Another important feature of drum brakes is the wheel cylinder, which is located at the top of the brake assembly. The wheel cylinder contains two pistons that move outwards when hydraulic fluid is pressed into the cylinder. This movement causes the brake shoes to expand and press against the drum. The design of the wheel cylinder is crucial, as it ensures even distribution of pressure on both brake shoes, promoting uniform wear and effective braking.
construction of drum brake
