【新唐人2012年11月07日讯】据大陆媒体报导，10月31号，中国第二种隐形战斗机-AMF五代战机歼-31成功试飞。但西方军事人士分析认为，这型隐形战机仍然没有突破发动机的技术瓶颈，隐形能力也值得怀疑，所谓第五代只是空有其名。中共在十八大有意放出试飞五代战机的消息，被外界看做是政治上的虚张声势。下面请看本台记者的分析报导。
据报导，由中航工业沈飞研制的歼-31，比歼-20小，更偏重于制空，未来可能作为舰载机使用。随机配备的两个发动机全部从俄罗斯引进。
《俄罗斯之声》广播电台11月1号发表文章，标题是：“中国首次试飞歼-31 给十八大献礼 向敌人亮剑”。但西方观察家们对中国歼-31隐形战机进行细致入微的分析后，得出结论，歼-31战机不足为患，更不能证明中国技术赶上西方发展。
军事专家认为，中国隐形战机最大的瓶颈是发动机问题，研制出配套的发动机可能需要十年甚至更长的时间。美国海军战争学院教授安德鲁?埃里克森(Andrew Erickson)和吉伯?柯林斯(Gabe Collins)在《华尔街日报》上撰文说，歼-31的双发设计，体现了两种可能：一方面，它需要更大的推力，去维持远程或巡航作战;另一方面，中国对俄制发动机性能不信任，担心单发不足以保证战机的正常使用。
据报导，中国的发动机刚跨越第三代，发动机与复合材料的使用仍然是短板。在涡轮叶片以及涡轮盘材料，和工艺两个方面的技术难题，没有大的突破。至今，包括歼-10战机在内的新型战机装备，仍然是从俄罗斯进口发动机。
“美国国家航空航天局（NASA）”工程师黄祖威，对“五代战机歼-31”的说法提出质疑，他举例说，飞机上的发动机，就好比计算机的CPU，直接体现出性能。歼-31的发动机达不到第五代，就不能说是五代机。
“美国国家航空航天局（NASA）”工程师黄祖威：“不可能就说我要发展第五代就第五代，技术不到就是不到，你做不出来。因为这个机械的东西，尤其这种喷射机、战斗机，他里面的…牵涉到高科技的东西非常多，尤其是他这个涡轮，讲那个叶片，比如你要在多少时间，能够让飞机爬升多高﹖或者是能够多快﹖在多短时间内达到超音速﹖你做不到就不能符合他（第五代）。”
美国等西方国家将航空发动机技术作为核心技术，对中国进行全方位封锁，中国根本无法进行技术引进。据报导，中国已将发动机研发作为国家重点工程，投入费用高达一千亿元，并在北京建立航空发动机产业基地。
黄祖威认为，航天高科技，并不是靠投入金钱、人力就可以研发出来，即使现在中共黑客窃取到的西方技术核心机密，拿去研究，也未必能做出来。
黄祖威：“你不知道那个秘方那个诀窍在哪里。不是靠钱和一些所谓的人才就搞的到的。还有个问题，你像武器和各方面先进的东西也好，不是一项突破就可以，要方方面面都跟着上，如果说现在它把这个偷来，你说不定还是做不出来，因为人家发动机设计和其他所有东西是配套的，你的系统不一定一样。”
西方防务专家们认为，歼-31战机将在未来很长时间内无用武之地。因为中国还没有制定在航空母舰上装备舰载机的计划，而且原型机实现定型、量产还需要很长的时间。另外歼-31的武器配备上也属一般，内置弹仓仅能放置四枚中程武器。
相比美国航空发动机技术预研能力已经到了第七代，中国发动机技术刚刚到第三代，当局却放出所谓第五代战机的消息，不免让外界觉得水分太多、太假。黄祖威认为，中共一直鼓吹航天科技来为它的执政地位造势，把自己吹大，吹成“伟光正”，目地就是给自己贴金。
采访/陈汉 编辑/许旻 后制/王明宇
Westerners Raise Doubts on “Fifth-Generation J-31”
China’s alleged J-31 stealth fighter reportedly made
a successful first test flight on October 31.
Western military analysts pointed out that the fighter has
a reported technical bottleneck on the engine.
They also suspected its real ability to dodge radar, and
the so-called “fifth-generation J-31” is just in name only.
The Chinese Communist Party (CCP) regime unveiled
“the fifth-generation J-31” ahead of its 18th Party Congress,
which is deemed to be political bluff.
The J-31 fighter jet was reportedly developed by
Avic Shenyang Aircraft Corp.
As China’s 2nd stealth fighter, the J-31 is smaller than
the J-20, and may be used on aircraft carriers.
Its two add-on engines were said to be
imported from Russia.
Voice of Russia published an online article on November 1.
It was titled “First Test Flight of China’s J-31, a Gift to
the 18th Party Congress and a Sword to Enemies.”
Yet, Western observers don’t treat it as a new military threat.
Nor could it prove that China has greater
technical prowess than Western counterparts.
Military experts say that the biggest technical bottleneck for
China’s stealth fighter lies in its engine.
The development time usually lasts about 10 years or longer.
Andrew Erickson and Gabe Collins, commented in a
co-authored article published in the Wall Street Journal. It said,
The double engine design has two possible reasons:
1) it provide more power for long route and higher performance.
2) China is worried about how reliable of the Russia made
engine, and can it perform well when its on duty.
Reportedly, China’s self-developed engine just reached
the third-generation.
Although the application of engine and
composite materials still has weaknesses.
No major breakthrough has been made yet on the material
and processing of turbine blades and turbine disk.
So far, engines on China’s new aircraft including
the J-10 are all imported from Russia.
Huang Zuwei, NASA engineer, questions the term of
“J-31 fifth-generation fighter jet”.
Huang says, an aircraft engine is just like a computer’s CPU,
which directly shows its performance.
The J-31, equipped with a below the fifth-gen engine,
can not be called “a fifth-gen fighter jet”.
Huang Zuwei: “Whether it’s called the fifth-gen fighter jet or
not it cannot be what it is claimed to be.
If technology falls short, you just can’t make it up
Because the machinery, like a jet or fighter jet,
is made with high-technology, which is especially shown
on its turbine and blade.
For example, the time frame and height that are designed
for the aircraft to reach in take off.
And how quickly it will reach supersonic speed?
If technology falls short, it cannot be called fifth generation.”
The U.S. and other Western countries take aircraft engines
as core technology that is fully confidential to China.
China has no normal channel to introduce technology.
Media reported that the CCP authorities have incorporated
engine R & D into national priorities projects.
The input cost was said to be as high as RMB100 billion,
and an aircraft engine industry base has been set up in Beijing.
Huang Zuwei comments that aerospace high-tech is not
achieved just through money and manpower.
Even if the CCP back-stage hackers stole core technology,
they may not necessarily achieve what they expected.
Huang Zuwei: “This is because they don’t have
the know-how, which is something that is not simply piled up with money and human input.
And success of R&D of advanced weapons or other
cutting-edge technology is based on breakthroughs made in several areas.
Even if you stole it, you may still be unable to use it,
Since it must be compatible with engines and various other facets of equipment which you may not possess.
other facets of equipment, which you may not possess.”
Western defense experts believe that it will take a long time
before the J-31 reaches full operational status.
As China has not yet developed a plan to equip
carrier-based aircraft.
It reportedly needs years to see mass production of
the J-31 prototype.
In addition, the J-31 carries quite common weapons and can
only hold four medium-range weapons in its built-in cartridge.
The U.S. has now developed the 7th-gen aircraft engine.
By contrast, China has just reached the 3rd-gen.
Yet, the CCP authorities now unveiled its “fifth-gen” jet fighter,
which naturally raised public suspicion.
Huang Zuwei says, the CCP has long hyped aerospace
technology to glorify its reign.
