What is the main purpose of a brake anti-skid system in aircraft?

The primary function of a brake anti-skid system in aircraft is to permit effective braking regardless of runway conditions. This system helps to prevent wheel lock-up during braking, especially on slippery or wet surfaces. When a wheel begins to lock, the anti-skid system automatically modulates the brake pressure to allow the wheel to continue rotating, enabling better control and maximizing the friction between the tire and the runway.

By maintaining traction, the anti-skid system enhances the safety of the aircraft during landing and stopping, ensuring that pilots can bring the aircraft to a halt efficiently even in adverse conditions. This technology is essential for maintaining control and preventing skidding, which is critical for preventing accidents and enhancing overall operational safety.

The other choices relate to aspects that are not the primary purpose of the anti-skid system. For example, reducing noise during landing, increasing acceleration on takeoff, or extending tire life are not direct functions of the anti-skid system. Instead, they pertain to different considerations in aircraft design and operation.