Which brake is typically used on most small general-aviation aircraft?

• A. Single-disc
• B. Dual-disc
• C. Twin-disc
• D. Hydraulic drum

Answer: (A)

On most small general-aviation airplanes, braking is provided by a single-disc hydraulic disk brake on each main wheel. This setup gives enough stopping power for light aircraft while keeping weight, cost, and mechanical complexity low. A single disc per wheel is compact and reliable, and the hydraulic actuation provides smooth, proportional braking feel through the rudder pedals, which is ideal for precise speed control during landing and rollout. Using more than one disc per wheel would add unnecessary weight and complexity for these aircraft, offering little benefit in typical GA operating conditions. Hydraulic drum brakes do exist in some designs, but disk brakes have become the standard in modern small GA because they cool more effectively and provide consistent performance with simpler maintenance.