m******e
发帖数: 536 | 1 【 以下文字转载自 Military 讨论区 】
发信人: meditate (meditate), 信区: Military
标 题: 新出炉国产大型运输机卫星照片
发信站: BBS 未名空间站 (Sat Jan 5 00:52:31 2013, 美东)
新出炉国产大型运输机Y-20卫星照片,由美帝卫星于去年１２月２５日在西安阎良机场
拍到。文章贴在下面了。
Satellites Spot China’s Mysterious New Warplane
By David Axe01.04.136:38 PM
A week after the publication of blurry photographs depicting what appears to
be China’s first long-range jet transport, Danger Room has obtained
satellite imagery of the new plane at an airfield in central China.
The images, acquired by the GeoEye 1 and IKONOS spacecraft — both belonging
to commercial satellite operator GeoEye headquartered in Washington, D.C.
— corroborate the general layout of the Xian Aircraft Corporation Y-20, the
existence of which has been confirmed by Beijing. They also underscore the
emerging consensus among Western experts that the Y-20, while outwardly
impressive, could lack the performance of even much older American, Russian
and European transports.
The IKONOS image (below) is dated Dec. 25. It shows the Y-20 outside a large
hangar at Yanliang airfield, home of the People’s Liberation Army Air
Force’s test establishment. The base is crowded with examples of the PLAAF
’s other main transports, including Y-8 medium airlifters and, apparently,
tanker versions of the aged H-6 bomber — both types of which could in
theory be replaced by the Y-20, ostensibly giving China the same global
military reach the U.S. and other advanced nations have enjoyed for half a
century.
The GeoEye 1 photo from Jan. 1 (above) depicts the new transport, which isn
’t known to have flown yet, on one of Yanliang’s runways, surrounded by
people and vehicles. News reports have claimed the Y-20 is currently
undergoing runway taxi tests in preparation for its eventual first flight.
But even after that happens, the Y-20 will probably need lots of work.
Indeed, when it comes to jet-transport technology Beijing is “falling
behind, not catching up,” John Pike, an analyst with the Virginia-based
Globalstrategy.org, writes in an e-mail to Danger Room.
Specifically, the Y-20 needs new engines — and there’s little evidence
that Beijing is making much progress on that front. The prototype is
reportedly fitted with old, Russian-made D-30 engines that probably aren’t
adequate for the Y-20′s design.
The new imagery is sharper, more detailed and shot from a higher angle than
the grainy first photos of the Y-20 that appeared on Chinese internet forums
in late December, providing a much more reliable basis for assessing the
transport’s layout. Apparently slightly smaller than the U.S. Air Force’s
workhorse C-17, the Y-20 sports the same wide swept wing and T-shaped tail
as the Boeing-made C-17, blueprints of which China obtained several years
ago through a spy working for the Chicago-based plane manufacturer.
“In order to get the kind of range/payload capabilities you need to use
this type of plane, it all comes down to the engines,” Richard Aboulafia,
an analyst with Virginia market forecaster The Teal Group, emails Danger
Room. “Designing a large, high-bypass turbofan is even harder than
designing a combat engine [for jet fighters],” Aboulafia adds. “China
shows no signs of being able to do that.”
There are only four companies in the world capable of building the kind of
engines the Y-20 needs, Aboulafia says: three — GE/CFM, Rolls Royce and
Pratt & Whitney — are Western companies and one is Russian. Arms controls
in the West make it unlikely that Beijing will be able to source the Y-20′s
motors from the former firms.
“In short, there are three possible explanations,” Aboulafia continues. ”
One, this is just a prototype, or series of prototypes. Two, it will be
built in series production, using a domestically-built knockoff engine that
will result in a very short-range plane with a light payload. Three, they’
ll do a deal with the Russians to start importing engines that can turn this
into a Chinese copy of a former Soviet transport design.”
But even a copy of an older Soviet transport would likely feature only
modest performance compared to more modern, unique designs. Moreover, Russia
has been reluctant lately to sell engines to China, justifiably fearing
that Beijing’s engineers will illegally reverse-engineer the motors.
All of which means the Y-20, so far, is more show than substance — an
intriguing subject for internet forums and passing satellites, but not yet a
threat to the transportation dominance of the U.S., Russia and Europe. | k*****r
发帖数: 21039 | 2 羡慕嫉妒恨的范文。
to
【在 m******e 的大作中提到】
: 【 以下文字转载自 Military 讨论区 】
: 发信人: meditate (meditate), 信区: Military
: 标 题: 新出炉国产大型运输机卫星照片
: 发信站: BBS 未名空间站 (Sat Jan 5 00:52:31 2013, 美东)
: 新出炉国产大型运输机Y-20卫星照片,由美帝卫星于去年１２月２５日在西安阎良机场
: 拍到。文章贴在下面了。
: Satellites Spot China’s Mysterious New Warplane
: By David Axe01.04.136:38 PM
: A week after the publication of blurry photographs depicting what appears to
: be China’s first long-range jet transport, Danger Room has obtained
| l*****i
发帖数: 20533 | 3 不能怪人家啊。他们习惯了印度那个节奏，觉得那才是第三世界国家的典型，那你中国
也应该是那个样子。如果不是那个样子那说明你作弊了。
说实话，中国在第三世界国家中间也的确是奇葩了一点。其他类似国家的确更接近印度。
【在 k*****r 的大作中提到】
: 羡慕嫉妒恨的范文。
:
: to
| k*****r
发帖数: 21039 | 4 我觉得这样下去，世界要重新洗牌。
100年前一战前，德国工业和技术突飞猛进，在战列舰建造竞争中超过了英国，这才有
一战。
米国现在政治上四分五裂，红波，米犹，老黑，劳模，同床异梦，技术上全面倒退，米
犹的伪科学教育了一代retard, 经济也崩盘了，只能靠印伪钞度日了。
先主席如果还在，抓住米国的几个矛盾，放大一下，火上浇油，肯定搞得米国鸡犬不宁
，欲生欲死，欲罢不能。
度。
【在 l*****i 的大作中提到】
: 不能怪人家啊。他们习惯了印度那个节奏，觉得那才是第三世界国家的典型，那你中国
: 也应该是那个样子。如果不是那个样子那说明你作弊了。
: 说实话，中国在第三世界国家中间也的确是奇葩了一点。其他类似国家的确更接近印度。
| h********o
发帖数: 2316 | 5 到底发动机搞出来了没有？这一架运20就用了4台发动机 | a********2
发帖数: 2561 | 6 哇，这还是公开的照片。那要是米国军方的照片得怎样的清晰度啊 | t****n
发帖数: 10724 | | B*G
发帖数: 13438 | 8 滑跑那架看起来比大运小多了
【在 t****n 的大作中提到】
: 看到了没有？大型固定翼飞机要上航母了！
| t****n
发帖数: 10724 | 9 美帝的C-17 也上不了航母。
那架正在滑跃跑道上起飞的飞机应该是运8级别的。
【在 B*G 的大作中提到】
: 滑跑那架看起来比大运小多了
| d*****t
发帖数: 7903 | 10 民用卫星最高分辨率0.4m，军用的不知道。这张基本就是0.4m.
【在 a********2 的大作中提到】
: 哇，这还是公开的照片。那要是米国军方的照片得怎样的清晰度啊
| M*****k
发帖数: 1556 | |
|
