ARRESTING GEAR ON A CARRIER
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Produced in 1944 and restricted as confidential, ""Arresting Gear on Aircraft Carriers" details the intricate mechanics and critical importance of aircraft carrier arresting gear and barriers, showcasing how these systems safely bring planes to a stop on the flight deck. It explains the historical development, components, operational procedures, and maintenance of the gear, including the hydraulic units and cables. Ultimately, the film emphasizes that the safety of pilots, aircraft, and personnel relies entirely on the efficiency and expertise of the arresting gear crew.
00:00 The history of aircraft carrier arresting gear, noting early experimental attempts with weights, springs, and sandbags that paved the way for modern successful installations. 2:06 A modern carrier landing is shown in slow motion, illustrating how a plane's hook catches one of the cross-deck pennant wires. Hook release men then disengage the pennant, which is subsequently retrieved. 2:45 Barriers are introduced, designed to stop planes that fail to engage a wire, thereby protecting aircraft and personnel in the forward area. 3:09 An animation breaks down the arresting gear and its components: cross-deck pennants (typically nine), barriers (three, with number one being the aft barrier), and seven hydraulic units below deck that control the pennants. Crewmen operate these at five stations. 3:51 The film details the component parts: yielding elements supporting pennants, deck shivs for purchase cables, and barrel fittings connecting pennants to purchase cables. 4:24 A specific unit controlling pennants is explained, focusing on the purchase cable as the link to the unit, reeved through fixed and movable crossheads, forming a 10-fold purchase system. 5:14 The unit's internal components are described, including the cylinder, plunger, constant pressure valve (controlling restraining force), limited lift valve (primarily for retrieval), piping, and accumulator (storing liquid and compressed air). 5:52 The operational mechanism. 6:35 After disengagement, the pennant is retrieved as the unit returns to battery by manually opening the limited lift valve, allowing compressed air to force liquid back, pushing the plunger into position. 7:04 Pre-flight checks are shown, with crewmen inspecting controls, yielding elements, and limited lift valves for freedom of movement. 8:18 Crewmen perform inspections and greasing of cross-deck pennants, identifying minor damage versus severe breaks requiring replacement. 9:21 The process of inspecting the purchase cable is shown, involving reducing accumulator pressure and pulling the cable out with a tractor while crewmen inspect it for damage. 10:42 After inspection, air pressure is rebuilt, and the purchase cable is retrieved by manually opening the limited lift valve. 11:34 A damaged pennant is replaced by matching its end with the purchase cable using a barrel fitting for quick connection. 13:17 The film includes a cautionary moment where a crewman improperly handles the constant pressure valve, emphasizing the danger of such mistakes to equipment and personnel. 14:31 The barrier system is further detailed. 15:56 Barrier operators man their stations, checking and adjusting stanchions for proper movement and height, and spare cables are kept ready. 18:24 The film shows carrier operations in action: planes landing, engaging pennants, and being taxied forward across barriers. The sequence of barriers rising and lowering to speed up operations is highlighted. 20:42 Phenomenon of "walk-back" is explained. Bleeder valves release these air bubbles. 21:22 The alertness of barrier operators in speeding up the landing interval is praised. 21:31 An off-center landing nearly causes an accident 22:27 A plane misses the wire and goes into the barrier 23:46 The film shows wooden blocks used to prevent damage to the purchase cable and highlights the precise adjustment of barrier support pennants. 25:25 Checks of the constant pressure valve and stanchions are performed 25:50 The critical role of barriers in saving planes and personnel is reiterated. 27:35 A successful landing. 28:02 Safety depends entirely on the ability and efficiency of the arresting gear crew in maintaining and operating their equipment.
00:00 The history of aircraft carrier arresting gear, noting early experimental attempts with weights, springs, and sandbags that paved the way for modern successful installations. 2:06 A modern carrier landing is shown in slow motion, illustrating how a plane's hook catches one of the cross-deck pennant wires. Hook release men then disengage the pennant, which is subsequently retrieved. 2:45 Barriers are introduced, designed to stop planes that fail to engage a wire, thereby protecting aircraft and personnel in the forward area. 3:09 An animation breaks down the arresting gear and its components: cross-deck pennants (typically nine), barriers (three, with number one being the aft barrier), and seven hydraulic units below deck that control the pennants. Crewmen operate these at five stations. 3:51 The film details the component parts: yielding elements supporting pennants, deck shivs for purchase cables, and barrel fittings connecting pennants to purchase cables. 4:24 A specific unit controlling pennants is explained, focusing on the purchase cable as the link to the unit, reeved through fixed and movable crossheads, forming a 10-fold purchase system. 5:14 The unit's internal components are described, including the cylinder, plunger, constant pressure valve (controlling restraining force), limited lift valve (primarily for retrieval), piping, and accumulator (storing liquid and compressed air). 5:52 The operational mechanism. 6:35 After disengagement, the pennant is retrieved as the unit returns to battery by manually opening the limited lift valve, allowing compressed air to force liquid back, pushing the plunger into position. 7:04 Pre-flight checks are shown, with crewmen inspecting controls, yielding elements, and limited lift valves for freedom of movement. 8:18 Crewmen perform inspections and greasing of cross-deck pennants, identifying minor damage versus severe breaks requiring replacement. 9:21 The process of inspecting the purchase cable is shown, involving reducing accumulator pressure and pulling the cable out with a tractor while crewmen inspect it for damage. 10:42 After inspection, air pressure is rebuilt, and the purchase cable is retrieved by manually opening the limited lift valve. 11:34 A damaged pennant is replaced by matching its end with the purchase cable using a barrel fitting for quick connection. 13:17 The film includes a cautionary moment where a crewman improperly handles the constant pressure valve, emphasizing the danger of such mistakes to equipment and personnel. 14:31 The barrier system is further detailed. 15:56 Barrier operators man their stations, checking and adjusting stanchions for proper movement and height, and spare cables are kept ready. 18:24 The film shows carrier operations in action: planes landing, engaging pennants, and being taxied forward across barriers. The sequence of barriers rising and lowering to speed up operations is highlighted. 20:42 Phenomenon of "walk-back" is explained. Bleeder valves release these air bubbles. 21:22 The alertness of barrier operators in speeding up the landing interval is praised. 21:31 An off-center landing nearly causes an accident 22:27 A plane misses the wire and goes into the barrier 23:46 The film shows wooden blocks used to prevent damage to the purchase cable and highlights the precise adjustment of barrier support pennants. 25:25 Checks of the constant pressure valve and stanchions are performed 25:50 The critical role of barriers in saving planes and personnel is reiterated. 27:35 A successful landing. 28:02 Safety depends entirely on the ability and efficiency of the arresting gear crew in maintaining and operating their equipment.
Sources
- YouTube channel: PeriscopeFilm · video ↗ — title, description, video
Record added 2026-11-04 13:36:17