Anti Skid
This is the automatic threshold speed down to which the anti-skid system remains active before shutting off.
What is 20 mph?
Early aircraft didn't have dedicated wheel brakes and instead relied on slow speeds, soft surfaces, and this mechanical device.
What is a tail skid?
This mechanical device traps hydraulic fluid in the lines to hold an aircraft completely stationary.
What is the parking brake?
This fluid condition is the primary cause of a "spongy" brake pedal feel
What is trapped air in the system?
This type of non-destructive tire structure classification indicates the relative strength of the rubber based on its internal fabric layers.
What is the ply rating?
This term describes the difference between how fast the airplane is moving and how fast the tire is rotating.
What is the slip ratio?
These high-performance brakes are 40% lighter than conventional steel brakes and withstand temperatures 50% higher.
What are carbon brakes?
These specialized mechanisms are used to lower hydraulic system pressure to match the specific, lower pressure tolerances of a brake assembly.
What are debooster cylinders?
These two chemical variants are explicitly named as the correct hydraulic fluids to utilize during servicing to avoid seal damage.
What are MIL-H-5606 and Skydrol®?
Molded directly into the nosewheel tire sidewalls, this curved protrusion deflects high-speed water and slush away from engine intakes.
What is a chine?
This specific anti-skid sub-feature prevents brake pressure from building during landing until the aircraft is fully on the ground.
touchdown protection?
Commonly found on light aircraft like Cleveland setups, this design features a disc rigidly bolted to the wheel while the caliper and linings float.
What is a fixed-disc brake?
This brake system type uses an independent master cylinder for each pedal and is found on light aircraft without a central hydraulic system.
What is an independent system?
This specific bleed method forces hydraulic fluid from the brake assembly up to the reservoir.
What is a bottom-up pressure bleed?
This type of hydroplaning occurs when a thin film of water on a smooth runway creates ultra-slick conditions and causes tire skid burns.
What is viscous hydroplaning?
Often called the "brain" of the anti-skid system, this unit is typically located in the avionics bay.
What is the Control Unit?
This obsolete brake type used from the 1930s to 1950s used a fabric-reinforced neoprene tube that expanded against an iron drum.
What are expander tube brakes?
Charged with air or nitrogen, this safety device stores emergency hydraulic pressure in case the primary pump system fails.
What is a brake accumulator?
This nondestructive testing method using fluorescent dye penetrant is recommended to find hidden flaws in a brake housing.
What is fluorescent dye penetrant inspection?
This powder substance must be applied to inner tubes during storage and installation to keep them from sticking to the outer casing.
What is talc?
This type of wheel speed sensor uses an electromagnet to generate a signal proportional to the wheel's rotation.
What is an AC Sensor?
Consisting of alternating steel stators and copper or bronze-plated rotors, this configuration is heavily utilized on large and heavy aircraft.
What are multiple-disc brakes?
This component uses an internal torque motor and a flapper to build or reduce pressure inside the anti-skid control valve.
What is a torque motor?
Weak return springs, trapped air, and warped discs are the three primary causes of this negative condition where the brake pads won't fully release.
What is brake dragging?
Underinflated aircraft tires will experience rapid and uneven tread wear concentrated heavily on this area of the tire body.
What are the tire shoulders?