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首页> 外文会议>Annual international symposium of the Society of Flight Test Engineers >Teaching an Old Aircraft Some New Tricks Lessons learned in the evaluation of Anti-Skid Brakes in the C-2 Greyhound
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Teaching an Old Aircraft Some New Tricks Lessons learned in the evaluation of Anti-Skid Brakes in the C-2 Greyhound

机译：教授一架旧飞机的一些新技巧在C-2 Greyhound的反滑雪制动器评估中汲取了一些新的技巧教训

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The C-2 Greyhound is a high-wing, twin-engine monoplane cargo aircraft manufactured by the Northrop Grumman Corporation to satisfy the Navy's need for the Carrier Onboard Delivery (COD) mission. Celebrating its 50th anniversary in 2014, the current-day COD aircraft has undergone myriad improvements to overcome both obsolescence and safety deficiencies. Although currently slated to be phased out during the next decade, there is still significant time and effort being expended to teach this old aircraft some new tricks.To accomplish its mission within restrained deck-space, the COD aircraft embodies all of the aerodynamic compromises of a twin-engine turboprop. It should be no surprise that the aircraft exhibits deficiencies in directional stability and coupling in all axes associated with power changes and response. These deficiencies also affect aircraft handling dynamics during landing roll-out. Early test flights of the C-2 more than 50 years ago identified a desire for an antiskid braking system (ABS). The addition of ABS to the C-2 would mitigate landing difficulties due to directional excursions. Although the COD mission requires nearly fifty percent shipboard landings without ABS, the remaining fifty percent require operations from remote, and often austere, locations. Because of variability in aircraft loads and runway conditions, the C-2, in performing the COD mission, would benefit tremendously from the increased safety and flexibility of an ABS.The extreme sensitivity of the C-2 wheel brakes has often caused inadvertent main tire failures during landing roll-out. Due to this sensitivity, it has become common practice to avoid the use of brakes at all costs during normal flight operations. New pilots are imbued with an unhealthy fear of brake application which has created a systemic limitation in COD aircrew knowledge of how to properly use brakes. During landing events in which directional control is compromised or in emergency situations when brakes are needed the most, the aircrew can't rely on the brakes as a safe and suitable control effector. To address the safety implications of this deficiency, the Navy initiated a program, which is currently being tested, to implement an ABS which would allow the use of brakes without experiencing main tire failures.
机译：C-2 Greyhound是由Northrop Grumman Corporation制造的高翼，双引擎单极货物运输机，以满足海军的需求载体交付（COD）任务。当天鳕鱼飞机在2014年庆祝成立50周年，经历了无数的改进，以克服过时和安全缺陷。虽然目前在未来十年中逐步逐步淘汰，但仍有重要的时间和努力来教导这一旧飞机一些新的技巧。在克拉的甲板空间内完成其使命，COD飞机体现了所有空气动力学妥协双发动机涡轮螺旋桨电机。这毫不奇怪，飞机在方向稳定性和与电力变化相关的所有轴上耦合的缺陷应该呈现缺陷。这些缺陷也会影响着陆滚动过程中的飞机处理动态。 50多年前C-2的早期测试航班确定了对抗性制动系统（ABS）的需求。由于方向偏移，增加ABS到C-2将减轻着陆困难。虽然COD任务需要近50％的船上着陆没有ABS，但剩下的五十个百分之五十个需要从遥控器和经常是AUSTERE，位置的操作。由于飞机负荷和跑道条件的可变性，C-2在执行COD任务时，将从ABS的增加的安全性和灵活性中受益匪浅。C-2车轮制动器的极端灵敏度经常引起造成的主要主轮胎着陆卷出来的故障。由于这种灵敏度，它已成为常用做法，以避免在正常飞行运营期间在所有成本中使用制动器。新的飞行员充满了对制动应用程序的不健康担忧，这在COD机组知识中创造了如何正确使用制动器的知识中创造了系统的限制。在降落事件期间，当最多需要制动时，定向控制受到损害或紧急情况时，车辆不能依赖于制动器作为安全和合适的控制效应器。为了解决这一缺陷的安全影响，海军发起了一个目前正在测试的程序，以实现一个允许使用制动器而不会经历主要轮胎失败的ABS。

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