How brake system works?

Answer 1

some planes, specially old ones, dont have any brakes - most of those that do have differnetial brakes where each of the two landing gear have a brake that operates seperatly so the barkes not only stop the aircraft but help to steer it on the ground - most brakes are operated by pushing on the forward or toe part of the foot pedals, each pedal opeating only the brake on its side so you steer by pressing the brake on the side of the direction you want to turn brakes are normally only used for short field landings and to come to a final stop - most airspeed should be lost before the plane lands and then the plane just coasts to a stop - the brakes on many planes are not designed for power stopping as both the wheels and brakes are usually rather small stop most turbo props and jets can brake by reversing thrust but reversing thrust on a turbo prop especially can have problems so its only used on short runways or emergancies (can throw dirt and gravel etc forward that then hits the prop causing prop erosion or damage as well as just being hard on thaose very expensive props - cheaper to replace brakes than props) Aircraft brakes are not much different than car disc brakes in general. The aircraft braking systems uses links and cables that port some of the aircraft hydraulic pressure to the brakes after going through a valve that meters the amount of pressure. The pilot pushes on the pedals which move some cranks and linkages and pulls on cables that operate a Brake Control Valve. The Brake Control Valve releases the desired amount of pressure flow to the Brakes. In between are Manifolds that are used by the Anti-Skid System to control braking on slippery conditions(more on that later). The Brake Assembly has a series of plates that mount on the main brake Housing. Every other disk plates is a Rotor and connects the outside of the disk to drive keys on the inside of the Wheel Assembly. The Stators are mounted between each rotor and it attaches to the brake housing, which is secured to the landing gear. Just as car disc brakes have a piston that pinches the pads against the disc, the aircraft brakes have a piston that squeezes the stack of discs(rotors and stators) together. At the base of the housing are Pistons that push when the brake pressure is applied and causes the Rotors and Stators to compress creating friction, thus stopping the aircraft. In order to protect the tires from skidding on slipper or icy surfaces, aircraft have Anti-Skid Control Systems. Just above the Brakes is an Anti-skid Manifold that works to release brake pressure. There is a electric transducer in each axle that measures the speed of each wheel and reports this to the Anti-Skid Control Box(computer). When one wheel stops turning while a/c is still moving, the computer tells the Manifolds to release pressure to that brake. This allows the brake to begin to spin back up to the speed of the other wheels and then the computer commands the Manifold to re-apply brakes. This anti-skid control can operate in fractions of a second. The Parking Brake works by a Parking Brake Valve that is mounted in the return lines for the brakes. When the parking brake is set, the Parking Brake Valve closes the return line and prevents the pressure from leaving the brakes. Up-stream of the Manifolds is a check valve that keeps the fluid from going backwards. Thus the Parking Brake Valve holds pressure within the brake lines and keeps them pressurized even when the aircraft power (engines and hydraulics) is shut down. Brake Accumulators are mounted in the brake system that holds pressure for emergency braking when the hydraulic pressure is not working. They are small pressure vessels that have a bladder that is pressurized with air. Custermen