Aircraft Anti-skid Systems?

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compared today's technology, max-arret system pretty dated, time. aircraft worked on using it, bac 1-11. implied, hydromechanical system, relying on centrifugal force determine when wheel slowing down (impending skid), release hydraulic brake fluid pressure. contained right inside axle, speed sensing , valving. when wheel slowed down enough, brake fluid released return port, allowing wheel speed increase, stay away skid condition, permitting maximum effective braking.
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modern day systems rely on wheel speed transducers, anti-skid modules, , anti-skid valves perform same function. basically, speed transducers (one in each axle hub) sends 3 phase signal anti-skid module. transducers fixed in axle , have 'spider' (resembles crank on fishing rod) attached center shaft on it. 'spider' driven 'pins' attached hub cap (wheel bearing cover). 'skid module monitors signals each wheel , several things. looks wheel speed slow down engineered value (impending skid) , when criteria met, releases brake fluid pressure particular brake assy, porting hydraulic system return via anti-skid valve. anti-skid system controls braking through 'return' side of brake system. different auto-brake system, controls braking through 'supply' side of brake system, have work using same hydraulic braking system, complementing each other. when impending skid sensed, brake pressure released through anti-skid valve , wheel speed accelerates point 'skid valve closes , effective braking brakes maintained. there engineered 'cut-out speed, when wheel speed drops below value (i forget is, i'm thinking around 20 30 knots) anti-skid system inhibited, permitting brakes applied complete stop. (without 'cut-out' speed, if think it, aircraft brakes never permit full application of brakes, thinking skid impending, , you'd plow right terminal).

i've been researching on aircraft anti skid systems , still bit weary how function. i've been researching mechanical anti-skid (maxaret) , modern day hydro-electronic anti skid system. besides 1 being more electrical , lighter, other major differences?


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