Chinese Engine Development

Orthan said:

Im not an expert, but WS-20 has been in flight testing for a long time, i think. Is this a sign of design problems and that the engine may have to be reworked ?? or is this a normal thing in aircraft engine development ?

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It's part and parcel of Engine development.
Every turbofan out there is a product of a decade or two's development and testing. That means, the turbo fans that are used right now are, more or less, products of 1980s and 1990s.

WS-20 was expected (by a minority in this forum that includes me) to appear on Y-20s by 2020.
This document, even though doesn't mention the WS-20, is a signal that testing conditions regarding High Bypass turbo fans in China hasn't matured yet and therefore will impact WS-20 and later HBTurboFans.

Can China still equip Y-20 with the engines? Yes,possibly. But China has to seek foreign testing assistance (Russia has the PD-90 engines...)

China wants to develop a whole engine development and testing ecosystem. WS-20 is merely a stepping stone for that.

My shot on ws10

A very interesting description about China's jet engine development.
Only those who have profound experience in decoding Chinese media can feel the importance of this news.
This is something you can feel, but can't tell because of its ambiguous wording.
I feel only WS-15 fits that kind description, but I am not sure about my guess.

Just4Fun said:

A very interesting description about China's jet engine development.
Only those who have profound experience in decoding Chinese media can feel the importance of this news.
This is something you can feel, but can't tell because of its ambiguous wording.
I feel only WS-15 fits that kind description, but I am not sure about my guess.



View attachment 56896

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So would you please be so kind and translate the relevant passages so that all non-Chinese reader can get the same feeling?

Deino said:

So would you please be so kind and translate the relevant passages so that all non-Chinese reader can get the same feeling?

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Just a tip, you can upload images to here to recognize the Chiense characters then you can google translate.



But the underlined part say something along the lines of having independently developed and built aircraft engines. Above says stuff about Long March 5 and the commissioned carrier.

Doesn't say anything about ws-15, I honestly think it's more about the WS-10

Whether it is WS-15 or WS-10, we cannot be 100% sure, thus each individual can has his own interpretation. The key words are 完全自主创新。。。成功研制和配装。。。现代工业皇冠上的明珠。

完全自主创新 = Completely self developed and with new innovation. This means the new engine is not based on a foreign ones.

成功研制和配装 = successfully developed and equiped. The word "equiped" meant some aircraft in service is already fitted with this new engine.

现代工业皇冠上的明珠 = Pearl on top of modern Industry Crown. This indicate the engine is top of the line in technological spec.

I won't speculate whether it is WS-15 or WS-10, but it is a very important advance engine that is for sure.

Was the WS-10 not based on a foreign one?

t2contra said:

Was the WS-10 not based on a foreign one?

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WS-10 has its roots in the CFM-56.

Whether the document would WS-10 it to be "Completely self developed and with new innovation" is another question.

Bltizo said:

WS-10 has its roots in the CFM-56.

Whether the document would WS-10 it to be "Completely self developed and with new innovation" is another question.

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Can we rule out the document was referring to the WS-10?

t2contra said:

Can we rule out the document was referring to the WS-10?

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Don't think so. It might be referring to WS-10. It might be referring to WS-15. It could be referring to something else we don't know about. Hard to say.