| 摘要 |
<p>This device relates to Nose Door jack with application to lower and retract the Nose Undercarriage Door of the SARAS aircraft. Its main sub assemblies are Piston S/A, Eye End S/A, Fork End S/A and Shuttle Valve S/A built around Cylinder. Cylinder houses Piston S/A which has locking Claws, Piston and Locking Bush. Eye End S/A housing Locking Piston and Seal Carrier provides attachment to the fixed structure on aircraft through Spherical plain Bearings to cater for any misalignment while operation. Fork end Sub Assembly provides attachment to the movable undercarriage door. Shuttle Valve sub assembly to enable extension through hydraulic pressure under normal conditions and pneumatic pressure under emergency conditions. Undercarriage doors can be retained both in lowered and retracted condition through claw type internal locking arrangement in retracted and extended condition of the jack respectively.</p> |
