Chinese SAC - FC-31/J-35 5th Gen Stealth Aircraft

Michael said:
You can check my previous content again. There is a very detailed explanation on this issue.
Click to expand...
Apology i think i mixed them up. You may probably mentioned WS-21 for PLAAF and WS-19 for export variants? right? than it would make sense. sorry for my weak memory :)
 
Michael said:
This is the WS-21 engine, not the WS-19 engine.
These two engines are relatively easy to distinguish in appearance (requires sufficient clarity in the photo).
Click to expand...
Correct me if I am wrong but isn’t the slow engine production rate a bottle neck for PLAAF at the moment or is it just restricted to the WS-15 engine for J-20?
 
Tariq Habib Afridi said:
Apology i think i mixed them up. You may probably mentioned WS-21 for PLAAF and WS-19 for export variants? right? than it would make sense. sorry for my weak memory :)
Click to expand...
Tariq Habib Afridi said:
@Michael see here you said your self that WS-21 engine is for foreign partner? and above you said that this inducted PLAAF J35 has WS-21 engine not WS-19?
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Again...

WS-21 is the export version engine, and WS-19 is the PLA's own version engine.

The development time of the two engines was almost simultaneous, and they came from the same design team. However, since WS-21 originated from WS-13/RD-33, its development speed was faster. It was put into production soon. WS-19 is a newly developed engine, which is more difficult to develop, and its progress is slower than that of WS-21.

The entire series of J-35 fighters initially used WS-21 engines to complete related research and development work.

The PLAAF's own version of J-35 also used WS-21 engines in the early development. When the PLAAF officially purchased it, all WS-19 engines were used. There are still several J-35A (WS-21) used for training, testing, evaluation and other purposes.

Since the WS-19 naval version engine has not yet been completed, the PLA Navy's ship-borne version of J-35 currently uses WS-21 engines. It is estimated that the engines will be replaced in subsequent batches.

The time difference in the development of each system has led to this situation.
StormBreaker said:
Correct me if I am wrong but isn’t the slow engine production rate a bottle neck for PLAAF at the moment or is it just restricted to the WS-15 engine for J-20?
Click to expand...
I don't understand your question, could you rephrase your question?
 
Michael said:
Again...

WS-21 is the export version engine, and WS-19 is the PLA's own version engine.

The development time of the two engines was almost simultaneous, and they came from the same design team. However, since WS-21 originated from WS-13/RD-33, its development speed was faster. It was put into production soon. WS-19 is a newly developed engine, which is more difficult to develop, and its progress is slower than that of WS-21.

The entire series of J-35 fighters initially used WS-21 engines to complete related research and development work.

The PLAAF's own version of J-35 also used WS-21 engines in the early development. When the PLAAF officially purchased it, all WS-19 engines were used. There are still several J-35A (WS-21) used for training, testing, evaluation and other purposes.

Since the WS-19 naval version engine has not yet been completed, the PLA Navy's ship-borne version of J-35 currently uses WS-21 engines. It is estimated that the engines will be replaced in subsequent batches.

The time difference in the development of each system has led to this situation.

I don't understand your question, could you rephrase your question?
Click to expand...
Apology i may have miss this information earlier. It now make sense
 
Michael said:
Again...

WS-21 is the export version engine, and WS-19 is the PLA's own version engine.

The development time of the two engines was almost simultaneous, and they came from the same design team. However, since WS-21 originated from WS-13/RD-33, its development speed was faster. It was put into production soon. WS-19 is a newly developed engine, which is more difficult to develop, and its progress is slower than that of WS-21.

The entire series of J-35 fighters initially used WS-21 engines to complete related research and development work.

The PLAAF's own version of J-35 also used WS-21 engines in the early development. When the PLAAF officially purchased it, all WS-19 engines were used. There are still several J-35A (WS-21) used for training, testing, evaluation and other purposes.

Since the WS-19 naval version engine has not yet been completed, the PLA Navy's ship-borne version of J-35 currently uses WS-21 engines. It is estimated that the engines will be replaced in subsequent batches.

The time difference in the development of each system has led to this situation.

I don't understand your question, could you rephrase your question?
Click to expand...
In Easy words, The pace at which Guizhou is producing engines is slower than the production capacity of SAC/CAC due to which their production isn’t at optimum levels?
 
Michael said:
This is the WS-21 engine, not the WS-19 engine.
These two engines are relatively easy to distinguish in appearance (requires sufficient clarity in the photo).
Click to expand...


But am I wrong, those on the J-35A look different!?
 
StormBreaker said:
In Easy words, The pace at which Guizhou is producing engines is slower than the production capacity of SAC/CAC due to which their production isn’t at optimum levels?
Click to expand...
According to the information I have learned so far:

SAC's J-35 mass production line and AECC Guizhou WS-19 dual-pulse production line. They will complete factory construction work within this year.

The WS-21 production line is a traditional one. It has been put into production a long time ago. Currently, Liyang Company has no plans to rebuild it.

Currently, all versions of the J-35 come from the pilot workshop of the old SAC factory, not the pulse production line. The output of this production mode is very small.

It is expected that the first batch of small-scale trial production will begin on the relevant production lines in 2026. After that, large-scale production will begin.
Deino said:
But am I wrong, those on the J-35A look different!?
Click to expand...
Nozzle designers from these engines:
WS-21 vs WS-19. Their nozzle surface processes are different.
At last year's Zhuhai Airshow, two J-35A aircraft equipped with different engines were showcased. They were the ones who helped me identify them.
 
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