Russian media: f-20 changing engine, American advantage shrunk-f-20 changing engine, j-20-IT information
Recently, the Chinese air force publicly announced large strategic transport aircraft-20 after the first batch of service, another message indicates that Chinese-made fighter jet, flying at the suspected service painting appeared.
According to the Russia military information network reported that since the United States began developing a fifth-generation fighter F35, other countries are not far behind, following a fifth-generation fighter aircraft. Including China. China has achieved in this area? United States General Dawei·gedefeien very sharp criticism of China's f-20 aircraft, but first take a look at United States F35 fighter f-20 aircraft and China have similarities and differences.
According to exposure picture shows on the network, recently, two production Chinese-made fourth-generation stealth fighter – the f- -20 at the same time, heavy launch test flight. From the pictures it looks, the two f- -20 the gray coating, machines are no longer coated with "20XX" numbered air force labeled low-visibility livery.
The end of 2014, China two prototype f-20, before a total of four prototypes. Compared to the previous frame, the prototype has a number of improvements. Truncated canard and tail, improved air intake and leading edges of the wings. In addition, electro-optical sensor system is installed.
2015 integrating the f-20 's five kinds of airborne equipment, including navigation systems, shipboard radars, identification friend or foe systems, airborne electronic equipment control system and an open electronic equipment adjustment. China's Defense Ministry said individual combat, even the most advanced fighter aircraft may not be able to win, to win the future war, must meet together with other branches of the air force operations. Main properties of the f-20 is stealth, digital flight control system, integrated avionics, airborne active phased array radar, "unusual" mobility and oth's ability to hit the target.
? Users previously captured suspected production of the j-20 fighter test flight
Average of 5-6 years of flight tests on the new fighters tied to the force. For example, the f-10 first flew in 1998 and, by the end of 2003 to complete tests; f-10B first flew at the end of 2008, and entered service in until 2014; f-11B first flew at the end of 2003, serving the end of 2008; carrier aircraft flew f-15 in 2009, and production until 2014. While the f-20 is expected in 2017 will be equipped with full set of airborne equipment, and entered service.
Chinese stealth fighter f-20 is not necessarily designed for close range combat. In addition to its designer, no one knows its real purpose. But there is a saying that the aircraft was designed for the United States reconnaissance aircraft and tanker built for long-range missile attacks. These types of aircraft is essential for us, without them, United States Air Force's capacity to wage war in the Western Pacific will decline.
Although the f-20 Stealth fighters, but the volume is very large, up to 19 m, with some self-defense capability. The fighters have used to increase the stability of the canard, but good for their stealth, which means China has lagged behind in this regard.
There is also a question, j-20 equipped with Russian-made AL-31F turbofan engines, and the engines for the f-London-based staff say is not strong enough. F-20 is a big step in terms of making stealth aircraft in China. Interview before the Pentagon predicted before the fighters by 2020, but in fact a prototype appeared in the January 2011 United States very surprised.
Expected before 2017, China built the first squadron of f-20, and initial operational capability is formed between 2017 to 2018. 2019 and 2020 will produce more powerful turbofan-15 engine, used to equip the fighter.
In the area of fifth-generation fighter aircraft, far ahead of other Asian countries, China, India, and Japan and Korea fifth-generation fighter aircraft in service no earlier than 2027. In addition to the f-20, China also built the f-31 aircraft, has completed flight testing.
Apparently, in the modern area of aircraft does not fall behind the United States. While some United States military sources skeptical about Chinese fighter, but in fact, China has the ability and technology to defend their territory.
俄媒：歼20将换发动机，美军优势锐减 - 歼20将换发动机,歼20 - IT资讯
近日，继中国空军公开宣布大型战略运输机运-20首批服役后，又有消息指出中国国产歼-20以疑似服役涂装现身飞行。
据俄罗斯军事资料网报道，自从美国开始研制第五代战机F35，其他国家也不甘落后，跟风研发第五代战机。其中就包括中国。中国在这一领域有何成果？美国大卫·戈德费恩将军非常尖锐的批评了中国的歼20战机，但是还是先来看看美国的F35战机和中国的歼20战机有什么异同。
据网络上曝光的图片显示，近日，两架量产型中国国产第四代重型隐形战斗机——歼-20在同时段升空试飞。从图片中看，这两架歼-20仍为灰色涂装，机首已不再涂有“20XX”的编号，空军标示为低可视度涂装。
2014年底，中国出现了两架歼20原型机，之前共有四架原型机。比起前几架，这两架原型机有了很多改进。截短了鸭翼和垂尾，改进了进气口和机翼前缘。除此之外，还安装了光电传感系统。
2015年整合了歼20的五种机载设备，包括导航系统、舰载雷达、敌我识别系统、机载电子设备控制系统和开放式电子设备的调试。中国国防部称，单兵作战，即使是最先进的战斗机也不一定就能赢，如果想赢得未来战争，必须同空军其他军种协同配合作战。歼20的主要性能就是可隐身、数字飞控系统、综合航电系统、机载主动相控阵雷达、“非比寻常”的机动性和超视距命中目标的能力。
▲此前网友拍到的疑似量产型歼-20战机试飞图
平均需要5-6年的时间对新战机进行飞行试验并列装到部队。例如，歼10于1998年进行首飞，到2003年底才完成测试;歼10B于2008年底首飞，而2014年才开始服役;歼11B于2003年底首飞，2008年底服役;舰载机歼15于2009年首飞，而2014年才开始批量生产。而歼20预计将在2017年装备全套机载设备，并开始服役。
中国隐身战机歼20的用途未必就是专用于近距离空战。除了其设计者，没有人知道其真正用途。但有一个说法称，这架飞机是专为对美国侦察机和空中加油机进行远程导弹攻击而建造的。这些种类的飞机对于美军而言至关重要，如果没有它们，美国空军在西太平洋发动战争的能力将锐减。
虽然歼20是隐身战机，但是其体积非常大，长达19米，具有一定的自我防卫能力。该战机有用于增加稳定性的鸭翼，但是却对其隐身无益，也就意味着中国在这一方面已经落后。
还有一个问题是，歼20装备俄制AL-31F涡扇发动机，而这种发动机对于歼20来说还不够强大。歼20是中国在制造隐身战机上迈出的一大步。五角大楼之前预测该战机将于2020年前面试，而实际上其原型机在2011年1月的出现让美国非常吃惊。
中国预计在2017年前建成歼20的首支飞行中队，并于2017年到2018年间形成初步作战能力。2019年到2020年将生产更加强大的涡扇-15发动机，用于装备该型战机。
在第五代战机领域，中国远远走在其他亚洲国家的前面，印度、日本和韩国第五代战机服役不会早于2027年。除了歼20，中国还建造了歼31战机，已经完成了飞行测试。
显然，中国在现代战机领域并不落后于美国。尽管一些美国军方人士对中国战机持怀疑态度，但事实上，中国已经有能力和技术来保卫自己的领土。