| 摘要 |
An arresting system which is adaptable to arrest a wide range of aircraft weights and speeds. A variable K factor energy absorber (40) for an aircraft arresting system has a movable control element (32) which is moved into different positions to adjust the K factor. The movement of the control element (32) is programmed during payout of the arresting system in accordance with the speed of the arrested aircraft. The speed is sensed by a pump (17) driven by the arresting gear (40) tape reel. The program is provided by a cam (12, 12A). The control element (32) is moved by a hydraulic drive (15, 16) actuated by an electrical shifting switch (107), which is triggered when the detected speed of the arrested aircraft exceeds the predetermined speed established by a cam (12) during initial and final phases of payout. The control element (32) is thereby moved from an initial low K (A) to an intermediate K (B) position during the initial phase of payout if the predetermined speed established by the cam (12) is exceeded. During the final phase of payout, the switch (10) shifts the control (32) to the high K position (C), if the predetermined speed is exceeded. The cam (12A, 28) also causes the control element (32) to be driven to a high K position (C) at the end of payout if it is not already there. Rewind (35) is accomplished by actuating the drive system (15, 16) to set the control element (32) in the low K position (A) to minimize the required rewind force. |
