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This study guide provides a detailed overview of aircraft arresting gear systems, focusing on the components and functions of the abe (arresting bed engine) system. It covers essential aspects such as crossdeck pendants, purchase cables, damper sheaves, and the arresting engine. The guide also explains the hydraulic resistance mechanism, accumulator functions, and emergency recovery equipment. Key topics include the constant runout valve (crov), fluid cooler operation, and maintenance procedures, making it a valuable resource for understanding the intricacies of aircraft carrier landing systems. Useful for students and professionals in mechanical engineering and naval aviation, offering a comprehensive understanding of arresting gear systems and their operational requirements. It is designed to enhance knowledge and skills in aircraft carrier operations and maintenance.
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Crossdeck pendants are suspended - Answer - 2 to 5 1/2 inches above flight deck recovery equipment controls are grouped into three areas - Answer - engine rooms, deck edge, pri-fly station recovery equipment three major systems - Answer - engine drive system, arresting engine, emergency recovery equipment engine drive system components - Answer - crossdeck pendent, purchase cable, damper sheaves, anchor dampers, various sheave installations CDP's - Answer - crossdeck pendants - engage arresting hook of aircraft Purchase Cables - Answer - wire rope connection between cdp's and arresting engine reeving - Answer - the threading of new purchase cables sheave damper installation - Answer - reduces peak cable tension by "damping" cable vibration created by initial impact retractable deck sheave - Answer - raised and lowered 4 7/8 inches above the flight deck by electric motor controlled by deck edge push button arresting engine - Answer - transforms the pull of the purchase cable into hydraulic resistance accumulator - Answer - receiving chamber for the fluid, displaced by the ram accumulator piston - Answer - contains v ring packing that creates a seal between the fluid and air side of the accumulator battery position - Answer - ready position CROV - Answer - constant runout valve fixed sheave assembly - Answer - two banks of rotating sheaves, nine sheaves in each bank, each bank mounted on individual shaft outer and inner bank sheaves diameter - Answer - outer - 33, inner - 28 crosshead assembly - Answer - slippers mounted on each corner of crosshead held in place by brass retainers, ram is attached to crosshead by bolts and split retainer
MEC - Answer - main engine cylinder MEC, ram, elbow assembly - Answer - mec and ram is actual engine of arresting gear, located within engine between elbow and crosshead arresting engine process - Answer - pulling of purchase cable moves crosshead forcing ram into the MEC, forcing fluid from cylinder through runout valve and into accumulator arresting engine going back to battery position - Answer - stored accumulator air pressure forces displaced fluid to return to the MEC thereby forcing ram and crosshead back to battery position fluid cooler - Answer - 107 copper tubes with salt water running through them maximum fluid temp. for fluid cooler - Answer - 170 degrees emergency recovery equipment - Answer - group of nylon webbing assemblies suspended across landing area from two 24 ft. tall stanchions procedure for arresting equipment after a week of being inactive - Answer - it must be exercised/used in order to keep freedom of movement and proper lubrication monitoring of equipment settings is the job of - Answer - all hands arresting gear sound powered phone circuit - Answer - 6JG responsible to make certain all pre operational inspections have been accomplished - Answer - arresting gear officer number of conditions of readiness - Answer - 4 (ready, standby, secure, inactive) purpose of arresting engine - Answer - arrest aircraft used to support MEC, accumulator, fluid cooler and air flasks - Answer - support saddles and straps inside diameter of MEC - Answer - 20 inches gallons of ethylene glycol in MEC - Answer - 180 purpose of wiper - Answer - remove dirt and grease from ram angular groove diameter of MEC - Answer - 1/2 inch deep
gives a visual indication of which distribution block needs maintenence - Answer - automatic relief system CROV = - Answer - constant runout valve CROV meters fluid flow from the MEC to what - Answer - the accumulator mating surface for valve stem - Answer - valve seat valve seat is sealed with what - Answer - o ring "dash-pot" - Answer - pressurized fluid between sleeve and stem small valve opening ratio for heavy aircraft - Answer - 4:1 (1/4 inch) large valve opening ratio for light aircraft - Answer - 1:1 (1 inch) adjusts overall height of stem sleeve - Answer - stem adjustment screw lower lever moves in what direction - Answer - vertical upper level moves in what direction - Answer - horizontal upper level is connected to weight selector by - Answer - yoke and lead screw weight selector has this in case of power failure - Answer - handwheel the plunger travels how many inches at all valve levels - Answer - one inch ideal runout in ram travel is - Answer - 183 inches max weight difference between CROV weight slector and dixon meter - Answer - 500 pounds turnbuckles purpose - Answer - adjust cable tension to 400 foot pounds turnbuckles max length of inches from centerline of pins - Answer - 16 - 1/16 inches diameter of the two drive cables in drive system - Answer - 3/8 inch "p-72" indicates - Answer - cable assembly has been proof loaded to 7200 pounds how many pulleys in drive system - Answer - eight what type of chain is the drive chain - Answer - bicycle chain
two sprockets that turn simultaneously - Answer - jack and drive used to adjust chain tension - Answer - pillow brick replace chains, cables and pins after how many months - Answer - 24 drive system cables, chains, pulleys and sprockets move in conjunction with what to cause the closing of the CROV - Answer - crosshead