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NOSE-GEAR-LAUNCH ACTUATOR RESET ASSEMBLY
NOSE-GEAR-LAUNCH SHOCK ABSORBER ASSEMBLY

Aviation Boatswains Mate E 3 & 2 - Aviation theories and other practices
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Figure 5-12.—Nose-gear-launch actuator reset assembly. the slider provide for the flow of lubricant between the slider and the inner walls of the housing. The slider actuating spring is housed in a hole in the bottom of the slider. The slider and spring are secured in the housing by means of the retainer. During operation when the slide assembly is forward, the reset-assembly slider is not restrained by the actuator assembly but is held above the surface of the housing by the slider actuating spring. After launch, as the slide assembly retracts, the actuator-assembly reset tooth contacts the reset-assembly-slider pad surface, causing the actuator assembly to rotate downward. This action permits the buffer hook to drop below the deck through the track opening into the deck housing cavity (see diagram B, fig. 5-11). When the buffer hook is below deck, the reset-assembly slider is held down in the housing by the actuator assembly. NOSE-GEAR-LAUNCH BUFFER CYLINDER The NGL buffer cylinder (see fig. 5-13) is in the deck housing between the NGL approach track and the aft slide-access track. The buffer-cylinder body has integral guide tracks on its top surface and contains three hydraulic cylinders. The two outer cylinders contain hollow piston rods; the center cylinder piston rod is solid. The forward end of each piston rod is attached to the NGL slide. Within each outer rod is an orifice tube, which meters fluid flow through the outer cylinders to absorb the forward energy of the aircraft hookup; the three piston rods are fully retracted into the cylinders, and hydraulic fluid is constantly circulated between the hydraulic system and the buffer cylinder, bypassing the cylinders through two metering orifice screws.   This metered flow, which is nonadjustable, prevents overheating of the hydraulic fluid. When the aircraft holdback bar engages the buffer hook, the slide assembly moves forward, pulling the three piston rods from the cylinders. As the rods move forward, fluid in front of each outer-cylinder piston is forced through the holes around the periphery of each outer-cylinder piston and through the metering holes in the two orifice tubes. As the pistons continue forward, the number Figure 5-13.—Nose-gear-launch buffer cylinder. 5-14







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