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Is China About to Get Its Military Jet Engine Program Off the Ground?

DrSomnath999

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By Gabe Collins and Andrew Erickson

Tensions in the South China Sea—most recently with the Philippines—and Beijing’s unease about Washington’s renewed strategic focus on Asia are likely to strengthen calls from the People’s Liberation Army (PLA) for more modern fighters and strike aircraft. Russia has historically supplied the high performance military jet engines that power these craft. However, China’s defense industry is working hard to become capable of mass producing Chinese-made military jet engines in order to end dependence on Russia, give China maximum strategic flexibility, and begin to compete with Russian-made combat aircraft in export markets.

But how soon is China’s domestic jet engine effort likely to achieve lift-off?

China’s inability to domestically mass-produce modern high-performance jet engines has been a persistent Achilles heel of the Chinese military aerospace sector. Although Chinese military engineers have made progress is building jet engines, the effort continues to suffer from problems with standardization and a shortage of skilled workers, in addition to an inability to consistently produce high quality turbine blades. Indeed, a recent article in People’s Daily quotes Russian sources saying China can copy most parts of the AL-31 engines that power much of China’s J-10 and J-11 fighter fleets, but still must import turbine blades from Russia.
The problems have likely slowed development and production of the J-15, J-20, and other late-generation tactical aircraft and are now attracting political attention at the highest levels.

In late 2010, President Hu Jintao gave Gan Xiaohua, chief engineer of the Air Force Armament Research Institute, an award in recognition of his 26 years of work on China’s military jet engine programs. High-level leadership engagement is important to help break down bureaucratic barriers that Mr. Gan says have hindered China’s ability to take a more integrated approach to building a jet engine industrial base and production infrastructure.

Despite the increased attention and resources China has focused on the manufacturing of jet engines, Mr. Gan’s concerns appear to remain valid. Engine production facilities remain geographically divided between the cities of Shenyang (Liaoning Province), Xi’an (Shaanxi Province) and Anshun (Guizhou province). This organizational structure produces more micro-level, but less macro-level, “competition” than Western norms. In addition, publicly reported figures concerning numbers of Chinese personnel working on particular programs appear surprisingly low by Western standards—unless there are significant “off balance sheet” resources somewhere else.

With jet engines, “Western standards” would appear to remain relevant, as the world’s few top jet engine producers are all located in the U.S. and Western Europe (with Russia a distant second in quality). Lack of cooperation and coordination among the various branches of the PLA the jet engine end-users, appears to be a problem. Localized bargaining and patronage may produce duplication of effort, mismanagement of resources and increased time-to-market. Dispersing resources among competing research entities to the extent that China does may be counterproductive, particularly at this stage of development.

The Soviet defense industrial base, on which China’s was originally modeled, failed in precisely this area: Talented designers and technicians presided over balkanized “feudal” design bureaus and irregularly-linked production facilities. Lack of standardization and quality control rendered that system less than the sum of its parts, helping the U.S. to win the space race with its superior systems integration—as facilitated by such private corporations as AT&T.

One of China’s great theoretical advantages over earlier Soviet efforts—widespread access to and exploitation of foreign technology—has worked in other areas previously, but it may prove problematic in practice when developing and producing systems as complex and demanding as high performance jet engines.

Standardization and integration, essential for jet engine development, may suffer particularly from an ad hoc, eclectic approach to strategic technology development and acquisition. Without advanced quality management practices such as Six Sigma or Total Quality Management (TQM), sophisticated components and systems design and integration capabilities, and an organizational culture that ensures honest reporting of problems, China’s technology will not add up to high-performance engines in practice. And with jet engines, there is little if any room for error or substandard approaches.

China’s ability to resolve the domestic engine production problem matters because if China’s engine makers can attain the technical capability level that U.S. manufacturers had 20 years ago, China will be able to power its latest-generation fighter and strike aircraft with domestically-made engines.

The new J-20 strike fighter program (first unveiled during Defense Secretary Gates’ January 2011 visit to China), especially needs domestic engine development and production breakthroughs because Russia appears reluctant to sell the high-powered engines that could enable the J-20 to supercruise (sustain supersonic flight without using inefficient afterburners) and thereby match the performance of the world’s most modern fighters such as the Lockheed Martin F-22 and Sukhoi T-50/PAK FA. Such developments would help cement China as a formidable regional air power and deserve close attention from policymakers.

However, evidence still suggests that China’s main military jet engine maker—Aviation Industry Corporation of China (AVIC)—is struggling to maintain consistent quality control as it scales up production of the WS-10 Taihang turbofan that China hopes to use to power more of its fighter fleet. This issue is causing problems with reliability and keeping China’s tactical aircraft heavily reliant on imported Russian engines. China’s July 2011 order of 123 additional AL-31 jet engines supports the view that domestically-made engines still are not good enough to rely on as the mainstay to power Chinese fighters.

The latest jet engine import numbers suggest Chinese engines may now power roughly 20% of the country’s most modern fighters and strike aircraft as well as the JF-17 fighters it is exporting to Pakistan. That means at least 80% of China’s tactical aircraft fleet runs on Russian-made engines and will likely continue to rely substantially on imported Russian engines to support its tactical aircraft programs over the next two years. China’s high-performance jet engine programs are nearing takeoff but they, and China’s development of a more competitive precision manufacturing sector, appear to still have some additional runway ahead of them.

Is China About to Get Its Military Jet Engine Program Off the Ground? - China Real Time Report - WSJ
 
The article fails for many reasons.

1. The article does not explain whether AL-31 and WS-10A engines are interchangeable. If the dimensions are different then it makes no sense to expensively retrofit existing fighters with new WS-10A engines. The alterations to fighters with existing AL-31 engines are not worth the cost.

2. Let's assume for the moment that AL-31 and WS-10A engines are completely interchangeable. It still makes more sense to continue using AL-31 engines after a major overhaul. There is already a built-in base of trained technicians that are familiar with the AL-31 engine. It makes no sense to swap out the AL-31 engines and bear the burden of immediately retraining all those technicians.

3. The anti-China article conveniently ignored the widespread use of the WS-10A over the last few years (see my post with pictures below) on the J-10, J-11B, and J-15. Clearly, there is no longer a bottleneck in producing WS-10A engines.

4. The article never explored the likely possibility that China is intentionally purchasing more AL-31 engines to keep the Russians happy. The real strategic Chinese goal is to purchase advanced Saturn 117S engines from Russia. However, the Russians want to make sure they receive sufficient billions of dollars for their engines. Hence, China pads the Russian profit margin by buying more AL-31 engines to induce the Russians to sell their higher-thrust Saturn 117S engine.

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Shenyang Aircraft Corporation's WS-10A engines are already in mass production

tQFLE.jpg


Could the WS-10A engine power the J-10, J-11B, and J-15 aircraft? The answer is "yes" if two conditions are met. Firstly, Chinese production of WS-10A engines must be sufficient to meet the demand (including production of parts for maintenance and replacement engines at the end of the expected lifetime) for all three aircraft.

Secondly, I don't know if WS-10A engines are interchangeable with AL-31F engines. If they are not readily interchangeable without modifying the fuselage then the current fighters with AL-31F engines will most likely stay with AL-31F replacement engines.

HWyjm.jpg

J-10B Vigorous Dragon flying with WS-10A engines

uibDi.jpg

J-11B flying with WS-10A engines

vNgn3.jpg

J-15 Flying Shark with WS-10A engines

To conclude the discussion on the use of domestic WS-10A engines on the J-10, J-11B, and J-15, there is a new photograph of a J-11BS equipped with WS-10A engines.

7rpku.jpg

"A [J-11BS] tandem twin-seat combat-capable training aircraft for J-11B pilots."

[Note: Thank you to SiegeCrossbow for the J-11BS picture.]

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WS-10A engine for J-10B Vigorous Dragon fighter in mass production

Vf425.jpg

WS-10A engine (with gearbox at the bottom) is designed to power the J-10B Vigorous Dragon fighter. This version of the WS-10A turbofan engine is said to have 13.2 ton maximum thrust. There are several wrapped engines near the floor.

[Note: Thank you to Pinko for the post.]

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J-10A and J-10B Vigorous Dragon evolution

5NtG3.jpg

The top photo is a J-10A with AL-31F engine. The second and third photos show a J-10B with DSI intake and AL-31F engine. The fourth photo is a J-10B with China's domestic WS-10A engine.

This sequence of pictures illustrates the evolution of the J-10 family from a J-10A (with AL-31F engine) into a J-10B with advanced DSI technology and WS-10A engine.

In the sequence of photographs, it is easy to distinguish between the AL-31F and WS-10A engines. The "flexible petals" on the WS-10A are a lot shorter than on the AL-31F.

K2ivl.jpg

Comparison of Chinese WS-10A (top) and Russian AL-31F (bottom) jet engines.

[Note: Thank you to HouShanghai for the first picture and Maya for the engine comparison picture.]
 
HAAAA.HAAA ,:lol:

WELL my dear old Good pal martian is here ,ok nice :D

martian buddy just posting pics of indigenious jet engine on various planes wont prove that china can mass produce those engines.
U must understand that CHINA needs to mass produce those WS 10a engines in order to be a completely independent aeronautical manufacturing power but also be big exporter of fighters with indigenious engines.
Not only WS 10 series but other WS variants also.

ANY ways whats the news about J10b induction ???
 
HAAAA.HAAA ,:lol:

WELL my dear old Good pal martian is here ,ok nice :D

martian buddy just posting pics of indigenious jet engine on various planes wont prove that china can mass produce those engines.
U must understand that CHINA needs to mass produce those WS 10a engines in order to be a completely independent aeronautical manufacturing power but also be big exporter of fighters with indigenious engines.
Not only WS 10 series but other WS variants also.

ANY ways whats the news about J10b induction ???

I just dropped by for a while, because I'm spreading the word of Filipino encroachment on Chinese sovereignty (since 1279 A.D. during the Yuan Dynasty) over the Huangyan Island/Scarborough Shoal. When a topic really annoys me, I tend to show up on all of the forums, YouTube video comments, and in the comment section of the mass media.

We have to wait until the Chinese government officially announces the induction of the J-10B. As you know, we might have to wait a decade before the official announcement. For example, the first flight of the J-10A Vigorous Dragon was in 1998. However, "the J-10 was officially unveiled by the Chinese government in January 2007, when photographs were published by Xinhua News Agency."
 
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