J-20 5th Gen Fighter Thread VIII

[siegecrossbow]

WS-15 should actually be better than the F135. Lower bypass than the F-135 but expanded performance envelope relative to the F119. Suggests the cycle architecture is better.

That’s confirmed in a PowerPoint slide presentation from AECC a while back.

 

[qwerty3173]

Ah so that's why the WS-19 is running like a ridiculously high OPR (I can't remember the exact number but it was absurd).

I would say that the datasheet released on this forum, while definitely connected with WS19, is not using the actual numbers. What is certain is that core equivalent airflow is at 20kg/s which is also around 20% larger than EJ200. So you see the analogy here, WS15 to F119 is like WS19 to EJ200, both are enlarged in size, renewed in their architecture and improved in materials. Its just that EJ200 is ultimately not as advanced as F119 and thus the design goals were achieved in a much shorter time-span.

 

[MeiouHades]

Dude you are on a Chinese defence forum. What do you expect? Of course there will be fanboys and ultranotionalist who often let their emotions have the best of them and make grandiose claims over every project. Just like you see the same in amzrican military forums, British forums, Indian forums, Turkish forums, Pakistani forums, Korean forums etc etc. Its normal, so I dont understand why you saif you have grown tired of seeing such things. Lol. To expect the opposite is asking abit too much. All Humans have similar traits they share in some ways. No country or race is special..so expect less and you will never be dissapointed. Lol

Yeah and that's why we have mods, to correct exactly this kind of behavior and chest-thumping.

 

[latenlazy]

Was China lazy when it developed WS-20?
Certainly there are ways to raise efficiency further and avoid drag of huge engine front. All advantages, no disadvantages, global leadership.

China was not lazy for developing the WS-20 because they never developed a domestic high bypass engine before. Did the US never develop a fifth generation engine before the F135?

Higher bypass is a choice, there's nothing lazy about that. You either aim for higher speed optimization, or you don't. Which is rather sensible on an engine made for aircraft, developed around 2x2000lb bombs and optional STOVL configuration.

J-20A is an air superiority fighter(first). F-35 is not. For range : payload pair, subsonic cruise is just more optimal. And developing a fully separate, even larger low bypass engine(rather than deep evolutioin of F119) just wasn't optimal...

? I never mentioned the bypass ratio?

 

[ACuriousPLAFan]

Don't want to risk causing troubles if I tell you the origin of my source. The new engine core has 35kg/s equivalent airflow compared to 30kg/s for YWH and f119 matured models. Compression ratio is increased to >28, and they were even envisioning a 20t engine at some point which is definitely possible from the core engine but eventually decreased the thrust for much better lifespan and improved fuel efficiency.

What is YWH? Sorry, memory needs a little refreshing.

 

[latenlazy]

What is YWH? Sorry, memory needs a little refreshing.

YWH-30 was the designation for the original core that was adopted for the WS-15 in the early 2000s.

 

[Deino]

Even at least one grey one was seen too

 

[latenlazy]

Gotta say the back end of the plane looks like it was made for these engines. It’s finally stopped looking weirdly proportioned.

 

[siegecrossbow]

Even at least one grey one was seen too

View attachment 166986

TWZ at the end of this week.

 

[David78]

Even at least one grey one was seen too

View attachment 166986

This is more likely a old J-20A at V-Day parade days.