A rotating-disc-type assembly in each main gear provides:

A rotating-disc-type assembly in each main gear provides:

• A. Aerodynamic stability
• B. Braking force
• C. Electrical grounding
• D. Fuel flow

Answer: (B)

The rotating-disc brake on each main gear is what provides the braking force. When you apply the brakes, hydraulic pressure pushes pads against the rotating discs that are attached to the wheels. The friction between the pads and discs creates torque that slows the wheel and, in turn, the airplane. The energy is dissipated as heat in the discs and pads, which is why braking performance depends on heat management and pad wear. This function isn’t about aerodynamic stability, electrical grounding, or fuel flow, which are handled by other systems.

The rotating-disc brake on each main gear is what provides the braking force. When you apply the brakes, hydraulic pressure pushes pads against the rotating discs that are attached to the wheels. The friction between the pads and discs creates torque that slows the wheel and, in turn, the airplane. The energy is dissipated as heat in the discs and pads, which is why braking performance depends on heat management and pad wear. This function isn’t about aerodynamic stability, electrical grounding, or fuel flow, which are handled by other systems.