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The J-20-engine discussion is over and other speculative topics ... to separate from the J-20-news !

So would you have the WS-15 of the AB thrust of 162KN and TWR 10 with more stealth on the rear or the WS-15 with the AB thrust of 180KN and TWR 11 with less stealth on the rear?
Without any doubt I will go for 162KN with more stealthy rear. The top priority of a 5th generation fighter is to stay as stealthy as it can.
 
Without any doubt I will go for 162KN with more stealthy rear. The top priority of a 5th generation fighter is to stay as stealthy as it can.

Then this is the J-20B we can expect.

In the next time, if we see a J-20 with the flat nozzle, then we can be sure it is the legendary WS-15.

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Or maybe ceramic sawtooth nozzle with 3D TVC.

If two stealthy fighters can't lock on each other in BVR scenario, they have to go dogfight.

Do you think it is possible for two different types of nozzle for the WS-15?
 
Finally, after debating for so many years. We got the answer.

Congratulations to J-20 A2 !
Congratulations to Taihang !

During anti-imperial Japan war in 1930s&40s, the Chinese soldiers fighting in the Taihang mountains was the back bone of China.
80years later, engine named Taihang become back bone of PLAAF.

Viva la Taihang!
Snipaste_2017-09-04_11-05-11.PNG

Fig. The Taihang Mountains
 
In last year's Zhuhai Air Show, China had introduced its 140KN WS-10B with a code name as the fourth gen engine.

Now this is the stealth version of the WS-10B, and based on the pattern of the previous WS-10, the optimized version of the WS-10B can reach 155KN. So the previous rumor about the 155KN WS-10G was not groundless after all.

Now we put all puzzles together, we can perceive a bigger and clearer picture overall.
 
"can't put their new engines, on there new airframes, without extensive air testing, on other aircrafts."

Yes, first, bench tests, then third party platforms test, are the usual american and Russian testing procedures, but according to the development plan, I posted earlier, testing on third party platforms was to be skipped, if bench testing was successful, and put WS-15 onto J-20, directly, for further testing. This is more risky, for sure, but there are no laws against that.

"Specifically, this says, . . . during the 7th 5 years plan (1986-1990) (planning, preliminary researches), 8th 5 years plan 1991-1995 (planning, preliminary researches) 9th 5 years plan 1996-2000(planning, preliminary researches and engine core researches), 10th 5 years plan 2000-2005(planning, focus on engine core), 11th 5 years plan 2005-2010 ( engine core pass bench test), 12th 5 years plan (2010-2015), if bench tests were successful, skip testing on third party platforms, and directly install on J-20 for testing , , ,"

It is more risking, I am sure, but J-20 was an extremely urgent project, they have to take more risks, to meet the tight schedule.

"I am reporting you for your baseless and clueless debates."

Be a little more mature, Bro.

Some people keep claiming WS-15 began bench testing on 2015, but according to this article, ground bench testing of the engine core was completed on 2005.

http://blog.sina.com.cn/s/blog_5387c42f0102xjuz.html

1.) 2000年, WS-15核心机开始研制。 "2000, WS-15 engine core start to develop."

2.) 2005年:WS-15核心机完成地面台架测试。"2005: WS-15 engine core completed ground bench testings"

3.) 2006年: WS-15发动机立项。"2006: WS-15 engine project was formally established."

4.) 2009年12月:WS-15核心机完成高空台测试。"December 2009: WS-15 engine core completed high altitude platform tests."

5.) 2011年:中航黎明完成WS-15验证机, 并提前交付。"2011: Liming Factory completed the WS-15 prototype, and was delivered ahead of schedule."

6.) 2012年底--2013年初:WS-15工程验证机通过高空台测试。"early 2013: WS-15 engineering prototype passed high altitude testings."

7.) 2014年:歼20第2011号进行WS-15单发试飞。"2014: J-20, number 2011, started testing with one WS-15 engine." (the other engine was probably the older version of WS-15)

8.) 2015年:歼20第2016号进行WS-15双发考核试飞;"2015: J-20, number 2016, with two WS-15 engines verification testings.

9.) 2016年:歼20第2101号生产型完成定型。"2016: J-20, number 2101, completed production model testings."

10.) 2016年底:歼20第2101号量产服役型奔赴珠海航展。"end of 2016: J-20, number 2101, production and service model, demonstrated at the Zhuhai China Airshow.

Notice, This article gave very specific dates and testing and develop timeline. The writer obviously got insider level informations.
no, anyone can come-up with a seemly detailed "development timeline"``````there are two VERY important engines still under development, one has started air test some time in 2016``````````
 
Maybe it is only good for the dogfight.

BTW, the 3D TVC will be fully tested on the WS-10B. So after that, they can decide whether the incoming WS-15 should go after 2D or 3D.
Uhh ... not exactly. I have my doubts as to if the Chinese are going to add 3D thrust vectoring to their engines. TVC bleeds energy during high intensive aerial maneuvers ... that's how a Eurofighter beat a F-22 which engaged its 2D thrust vectoring. China should instead look to increase the thrust of its engine ...
 
The latest image (September 2017) indicated that since early 2017 a J-20A prototype has been fitted with two indigenous WS-10X turbofan engines featuring stealth nozzles with saw tooth edges, suggesting the Chinese engine technology has become mature enough to finally have the Russian engines replaced.

J-20A_WS-10X.jpg


Congratulations :china:

 
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