第七百一十七章 F-15S/MTD验证机
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下午三点，天空晴朗，茹科夫斯基人声鼎沸。龙腾小说ltxsba.com
坐在遮阳的帐篷里面，望着远处的跑道，举起手中的望远镜，航展的重头戏，飞行表演终于开始了。
当一架涂成红白相间，尾部涂着nasa的战机滑上跑道的时候，所有人都从自己的座位上站了起来，那是什么？是这次美国的表演机吗？
从外形上看，这架飞机跟f-15很相似，高大的双垂尾，两侧矩形进气道，气泡式座舱内，一名飞行员正在向这边挥手，但是，在主翼的前面，那玩意儿是什么？怎么又多出一对小翅膀来？那东西，有些上翘，好像还能动？这是什么东西？鸭翼么？
哼，果然就这个东西，把技术验证机搬过来了！站在指挥塔上，望着下面跑道上的战机，安德烈不由得在心里嗤之以鼻，美国人，不是自己都宣称最好的鸭翼是在敌人的飞机上的吗？就连安德烈都很排斥的三翼面布局，美国人还是尝试了！
当然，这可不是最终定型，装备部队的型号，这玩意儿，只是个验证机而已！
f-15s/mtd，是麦克唐纳-道格拉斯公司在1984年为美国空军莱特航空研究所研制的f-15短距起落及改进机动性能的先进技术验证机。验证机，其实就是验证先进的航空技术的，而这项验证机，主要是用来验证4项技术：二元推力转向/反推力喷管、综合飞行/推进控制、凹凸不平/软场地短距起飞着陆起落架以及先进的人/机接口。
从这些项目上看，这架由f-15b改装而成的技术验证机，将会具有杰出的机动性能，而这个机动性能，就是从前面的鸭翼和后面的矢量发动机上得到的！
这架验证机的两侧进气道上壁板处安装全动水平前翼，这个水平前翼不是全新研制的，而是由f/a-18a水平尾翼改进而成，而且，增加了20度的上反角，方便同向或差动偏转产生俯仰及滚转力矩。
同时，这架飞机的尾部的f-100发动机，也进行了改进，安装了碳纤维复合材料的矩形二元转向喷管，可使发动机推力相对飞机纵轴上下偏转，最大偏转角可达20度，提高了飞机起飞性能及机动飞行性能。而且，喷管里的推力反向叶片可使推力反向，实现飞行中紧急减速及短距着陆滑跑，跟客机的原理差不多。
而为了对这些多出来的控制系统进行操控，f-15原来的液压操作已经无法对这么多的系统进行准确操控了，所以，这架战机还引进了数字式电传操纵系统，实现了综合飞行/推进控制，使飞机在不改变原飞行轨迹的情况下改变推力，并实现所有飞行参数控制。
本来，f-15战机借助强大的发动机，机动性能已经在三代机中是一流的了，而采取了这些手段之后，机动性能更加出色！
在历史上，这些改进几乎是到了88年才完成，在89年到91年间进行了反复的试飞，但是现在，在苏联的刺激下，美国不得不加快新战机的研制。
以前的时候，苏联人的米格25，就压得美国人喘不过气来，而现在，苏联人的新一代的战机，米格-29，苏-27，都在快速地定型装备部队，美国人压力山大，他们除了紧锣密鼓地研制自己的第四代战机之外，对现有战机的改进，也是其中的重点内容。现在的这个技术验证机，可不仅仅是验证技术的，如果证明性能可靠的话，说不定会按照这个标准来生产新战机的。
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