航线CRJ-200 Landing Gear and Brakes.pptVIP

* GEAR EXTEND BY GRAVITY  NOSE GEAR ASSITED BY SPRINGS AND AIRFLOW MAINS ASSISTED BY SMALL #2 HYD ACTUATORS * OPERATING LIMITATIONS Max Speed to Extend—250 kts Max Speed to Retract—200 kts Vmax Tire—182 kts Gnd Speed Min time between landing and takeoff – 15 Min BTMS – Stable or decreasing or less 6 Units before Takeoff or consult POH * GEAR AND BRAKE SUMMARY Normal gear requires #3 Hydraulics Alternate extension primarily gravity with assistance from #2 Hydraulics Brakes utilize both #2 and #3 Hydraulics(Remember #3 available even with dual engine failure because of ADG.) Backup #3 Accumulator for Emer Braking and Overnight Parking Brake BOTTOM LINE—Much redundancy…almost fail safe! * OVERVIEW Hydraulic Gear Mechanical Gear Doorsexcept FWD Nose Door (#3 Hyd) Dual hydraulic brakeswith Antiskid Steerable Nosewheel Emergency Extension Emergency Brakes * THE END * CRJ LANDING GEAR AND BRAKES * * Nose gear retracts forward. Mains retract inward (partially exposed). * CONTROLS * GEAR CONTROLS * GEAR CONTROLS * BRAKE TEMP Gear Position * GEAR SEQUENCING PROXIMITY SENSING ELECTRONIC UNIT(PSEU)Dual sensors each GearSenses position of gear, gear doors, exit doors, flaps, andspoilers; and providesWOW info to gear, anti-skid, ECS, and other systems. * CONFIGURATION WARNINGBeeeeeeeeeeeeeeeeeeep! 185 KIAS OR LESS, FLAPS UP, ONE OR BOTH THRUST LEVERS AT IDLE 163 KIAS OR LESS, FLAPS GREATER THAN 0, ONE OR BOTH THRUST LEVERS AT IDLE NO HORN MUTEBELOW 163 W/FLAPSGREATER THAN 30OR BOTH TL’S IDLE “TOO LOW GEAR”BELOW 190 KIAS ANDLESS THAN 500’ RA * MAIN GEAR DUAL WHEEL TRAILING LINK #3 HYDRAULICS NITROGEN/OIL OLEO STRUT * Main Gear Door Ground Safety Pin * NOSE GEAR CHINES * OPEN CLOSED NOSE GEAR DOORS * NOSE GEAR DOOR RETRACTION SYSTEM ( hydraulically operated) * NOSE WHEEL STEERING+- 68 Deg w/Tiller +- 5 Deg w/Rudder Pedals360 Deg Free Caster w/o Torque Arm Mechanically and Electrically Centered#3 Hydraulics FRONT * CAPT’S TILLER “