Three interesting news …
1. Reportedly 4 J-20s spotted today at CAC and in mind of the 95th anniversary of the CCP’s foundation today, maybe a hint for the first J-20 handed over to the PLAAF ???
2. Also reported, the first prototype J-15X equipped for catapult launch has made its maiden flight a few days ago … here it is !
3. And … the FADEC equipped WS-13E / WS-13IPE had its first 7-minute flight test on board of the FC-31 demonstrator ‘31001’ today.
Deino
Interesting indeed! The speed of J-20’s induction seems to indicate that modern air frame design and testing in China have become efficient and routine after the J-10A.
The J-15X shows intention of a CATOBAR carrier! A ship along the lines of US super carriers of 100k tons? Paired with EMALS? Possibly the biggest (literally) story in the coming years if realized.
FC-31 with WS-13E is significant in so many ways!
One, engine design and testing after WS-10 is reaching a routine state like that of airframes after J-10. There has been a flood of engine news and rumours this year involving the WS-20, Minshan, WS-15 and others. For those of us following Chinese aviation over the years, this period for engines has the same feel in pace and scale as what we first saw in airframes beginning in 2002 with J-10A where over the next decade we saw an explosion of new designs and variants.
Two, the FC-31’s future has brightened greatly with a domestic engine. This is an airframe design private to SAC that will now get more play both domestically and exportwise with a powerplant not subjected to the whims of a third party. Just as the L-15 was a private project that was finally accepted into the PLAAF with the WS-17, the same could happen with FC-31. On top of that, they were able to test a new engine on this particular air frame — confidence in both the new engine and the lone flying prototype? Or is FC-31 2.0 ready so there is less worry about risking 31001?
Three, JF-17 will now have a domestic engine with all that entails for export or even domestic adoption.
Interesting news with even more interesting implications!
The run for first four (?) Chinese Su-35S has already been included in the KnAAZ production plans for 2016 (?), so I would consider it to be FAR more than just a rumor..
Again. Let’s talk when we actually see a Su-35 in PLAAF colors.
Another interesting point, who is gonna do the service intervall on the s117 engines.
Me things Russia..Its not the average AL-31FN..
Again, let’s talk when we see the Su-35 in Chinese colors. This story comes up every year and we never see a PLAAF Su-35.
Unlike the fabled Chinese Su-35, we have photographic evidence of J-11Ds and J-16s with WS-10As. As well as the WS-20 (developed from the WS-10 core) on all four engine mounts of the IL testbed.
Let’s talk when the first Su-35 actually arrives in China. I predict we’ll see a Chinese marked Su-35 when we see a homemade fighter from Vietnam or Uganda.

Dr. Song Wencong, the chief designer of the J-10, had passed away at the age of 85 in Beijing.
He began designing aircraft during a very turbulent period during the 1960s and was involved in the cancelled J-9 project which was the immediate predecessor to the J-10.

Probably to test the feasibility of retrofitting the ws-10 to the J-10 when they come in for engine overhauls. Preparing for the day they would run out of stock of the Russian engines.
According to the Chinese forums this picture is very old. So it is likely that 1004 was fitted with the WS-10 even before 1035 (first J-10B pictured with the WS-10) and probably done for the benefit of it.
Remember, 1035 was at that point only the third flying J-10B example so prep work for it to receive the new engine may have been done earlier on 1004.
Engine rumors continue to roll out in the Chinese-language forums — a TVC variant of the WS-10B (14-tons) is supposedly being tried out in a flying testbed. The buzz is very strong, it seems a lot of projects are coming online or to fruition right now.
Three Y-20s at XAC …
Chinese press is reporting the aircraft going operational by year’s end.
The two ‘twenties projects — Y-20 and J-20 — seem to have gone extraordinary smooth and quick.
http://english.cntv.cn/2016/02/19/VIDElUeK8oWYMlwNetIwbva3160219.shtml
The export model of the Chinese Vigorous Dragon J-10 fighter jet has made its debut at the Singapore Airshow.

You’re assuming there are only two applications for WS-13. It’s probable there’s at least another project, possibly unmanned that this engine is slotted for. It’s also good to have an alternative to a Russian engine for many customers.
Exactly. Even if there were no other current Chinese projects, setting up engine production lines are still viable since airframes and powerplants are independent entities.
But in China’s case with its track record of new fighters in the past decade, there is almost certainly projects lined for available powerplants — which traditionally were supposed to be the “bottleneck” (though that didn’t stop China from cranking tons of fighter variants.) Imagine the designs being put forth with powerplants at hand.
At any rate, with the current known designs, the L-15 is being accepted into the PLAAF as the JL-10 because it will receive a domestic engine. By the same token, the ws-13 can tip the J-31 into acceptance.
And yes, if the ws-13 becomes a mass produced commodity then it can replace the Rd-93 in future marks of the JF-17 or more likely in sales of the FC-1 to other nations.
Why would WS-13 enter full production when there are no airplanes in production that will use that engine? Unless ones assumes China is going to start building FC-1s for itself, as J-31 is no where near its production and the PAF is content with RD-93s
Think of it this way: lack of a domestic engine did not stop airframes like the L-15, J-10 and FC-1 from going into production so why would a (possible) lack of airframes stop the engines from going into production?
Along with the ws-10 (and ws-15), these two will provide the full stable of thrusts from light to heavy which can power the full range of design.
If it pans out, the engine lines will now be available when the airframes are ready instead of the other way around.
From the Chinese website qq:
http://xw.qq.com/news/20160222019207
Chinese forums have been buzzing with rumors that two engines — the medium thrust ws-13 (J-31, FC-1) and the light thrust ws-17(first I heard of the designation) for the L-15 — are entering full production.
Why? Is it because he presents a view that does not agree with your glowing opinions on China?
How many “glowing opinions of China” are there in this forum? There are pretty much none. So why do you need to deal with this “problem” from one of the most respected posters in the forum? Andreas is hardly just another poster but an author whose books and articles are read by some of the most informed people in the military aviation circles.
Now Deino might not think so but I see this thread as well as all the other “Chinese” threads — outside the PLAAF thread — as pretty much flame bait intended to attract the same hackneyed response based on stereotypes and perceptions. But that is my opinion not Deino’s — since unlike me, he attempted to answer the original poster.
So if you think answering contrary to the prevailing anti-Chinese theme in these threads is inappropriate (by someone who is a published expert on Chinese aviation no less) then why not just post at the very beginning that no argument perceived as “pro Chinese” will be expected?
It would save the few Chinese aviation followers in this forum the time and effort to respond.
A pretty significant development in the PRC’s engine program.
The medium trust ws-13 is coming out of the shadows soon? This would power the J-31 as well as the JF-17.
Paris Air Show 2015: JF-17 fighter flying with indigenous Chinese turbofan
Richard D Fisher Jr, Paris – IHS Jane’s Defence Weekly
15 June 2015
Key Points
Chinese officials at the Paris Air Show have said flight-testing of a new indigenous engine for the JF-17 Thunder is under way
Officials also confirmed that the Sino-Pakistani-developed aircraft had achieved its first international sale, although they did not disclose the customer
A senior Chinese aviation official has revealed that the Chengdu Aircraft Corporation FC-1/JF-17 fighter co-developed with Pakistan has been test-flown with a new Chinese medium-thrust turbofan engine.
Li Yuhai, an executive vice president with the Aviation Industries Corporation of China (AVIC), told IHS Jane’s at the Paris Airshow that a new Chinese turbofan for the J-17 has been “under testing,” has completed “lab tests”, and that “flight testing is in progress”.