J-20? Nah

choi

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Jeremy Page, A Chinese Stealth Challenge? Wall Street Journal, Jan. 5, 2011 (front page).
http://online.wsj.com/article/SB10001424052748703808704576061674166905408.html

Quote:

(a) "The exact origin of the photographs is unclear, although they appear to have been taken by Chinese enthusiasts from the grounds of or around the Chengdu Aircraft Design Institute in western China, where the J-20 is in development. A few experts have suggested that the pictured aircraft is a mock-up, rather than a functioning prototype of a stealth fighter

(b) "U.S. officials played down Chinese advances on the plane, which American intelligence agencies believe will likely be operational around 2018. 'We are aware that the Chinese have recently been conducting taxi tests and there are photos of it,' said Pentagon spokesman Col. David Lapan. 'We know they are working on a fifth-generation fighter but progress appears to be uneven.'

"Col. Lapan said it appears the Chinese are still seeking engines for a fourth-generation fighter from Russia, an indication that they are "still encountering problems" with development work toward the fifth-generation aircraft, the J-20.

My comment:
(a) Mr. Page has a propensity to overstate China's strenghs, be it is military or civilian.
(b) Taiwan military is totally unimpressed. A previous (traditional) Chinese-language from Taiwan* report said in essence that a named defense official of Taiwan commented that everybody knows what a fifth-generation fighter jet should look like (and thus hinted anybody can draw up one).

* I thought it was from Liberty Times, but I cannot find it there.

The latest from Taiwan:

曾依璇, 網路殲20照片 軍方存疑. Central News Agency, Jan. 5, 2011.
http://tw.news.yahoo.com/article/url/d/a/110105/5/2kacc.html
(c) Come on, Taiwan and US alike have satellites scrutinizing China like a hawk. What can evade their eyes? Nothing.



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choi

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One may ask, "You are totally ignorant. How could U.S. monitoring the Chinese activities when they are under a roof?"

(a) But we all know that scientists/engineers have developed hand-held gadgets which can see through walls, in part to alert law enforcements or soldiers when they storm a house or conduct urban warfare. And we all know American airports feature machines that can see through clothes (backscatter X-ray).

(b) The definite proof of such technology in a satellite setting is

Joby Warrick, Domestic Use of Spy Satellites To Widen; Law Enforcement Getting New Access To Secret Imagery. Washington Post, Aug. 16, 2007.
http://www.washingtonpost.com/wp-dyn/content/article/2007/08/15/AR2007081502430.html
("The Bush administration has approved a plan to expand domestic access to some of the most powerful tools of 21st-century spycraft, giving law enforcement officials and others the ability to view data obtained from satellite and aircraft sensors that can see through cloud cover and even penetrate buildings and underground bunkers")

(c)
(i) Technology has so advanced that we can see through a machine.

Anne Eisenberg, A C.T. Scan for Hairline Fractures (in Industrial Parts, That Is). New York Times, Jan. 2, 2010.
http://www.nytimes.com/2011/01/02/business/02novel.html?scp=1&sq=machine%20x-ray&st=cse
("The machines can also be used for reverse engineering, measuring the external and internal dimensions of objects; these are scanned so precisely that a duplicate can usually be created from the data, said Neil Gershenfeld, a professor at the Massachusetts Institute of Technology.")

In the print, but not online, there was an image of the CT Scan.

I am unaware this technology is applied in spy satellites.

(ii) For more than a decade, I go to state capitol every day to use its library. The building is staffed by park rangers of the state. Before 911, people just walked through the gates. Amazed, I asked a janitor (a white, middle aged man) there how come there was no security check point. He shrugged and said, "Who wants to kill these corrupt officials?" After 911, metal detectors were set up. and I was again amazed that the scanners in which a visotor put things in and came out the other end can see through metal, to an extent (if it is a lock, it look opaque in the screen, but the scanner can denifitely look inside an unopened metal can of fruit).

(d) In any event, even without this technology--and Taiwan does not--nothing can be kept under wraps all the time. it has to be trotted out for a test. Right?



【 在 choi 的大作中提到: 】
: Jeremy Page, A Chinese Stealth Challenge? Wall Street Journal, Jan. 5, 2011 (front page).
: http://online.wsj.com/article/SB10001424052748703808704576061674166905408.html
: Quote:
: (a) "The exact origin of the photographs is unclear, although they appear to have been taken by Chin
: (以下引言省略...)

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※ 修改:．choi 于 Jan  5 15:06:59 修改本文．[FROM: 129.10.0.0]