Chinese Engine Development

O

OppositeDay

Senior Member
Registered Member
Alfa_Particle said:
Again, the 56-5 series have ONLY 24 fan blades. The even earlier models have 36.
Click to expand...
The 5 series has more, narrower blades. Only the 7 series have 24 wide chord blades.
1604002931714478_409-2643749021.jpg

Alfa_Particle said:
It makes complete sense to me in a maintenance perspective. Ti-leading edge composite fan blades are much more tricky and expensive to maintain and replace if I remember correctly. And strategic lifters don't really benefit from the advantages composites blades bring, say weight savings/better fuel economy.

Comparing that to commercial airlines, which usually lands in much better conditions and not going through constant environmental stress (less than strategic lifters at least), and require better fuel economy, the benefits composite fan blades bring are greater.
In summary for and against wide chord fan on WS-20


I'm heavily leaning towards non-wide chord titanium fan blades. The reason why AEF-1300 uses them is, as I said, probably due to the different maintenance factors and requirements for commercial airlines. No reason for the WS-20 to implement them.
Click to expand...

Wide chord fans don't have to go hand-in-hand with composite blades though. CFM56-7B uses hollow titanium wide chord blades, same for the 2018 CJ-1000 display model. Is there any reason against wide chord for military transport? Embraer C-390 uses V2500 which has hollow titanium wide chord blades.

Are there any eyewitness assessment of how quiet Y20B are? Wide chord fans tend to be quieter for the same airflow (as DIY PC builders know), so that could be a clue.
 
Alfa_Particle

Alfa_Particle

Junior Member
Registered Member
OppositeDay said:
The 5 series has more, narrower blades. Only the 7 series have 24 wide chord blades.
Click to expand...
Nevermind, you're correct. I was looking at the -7B.

As for why wouldn't they use wide chord blades, they have higher production costs and harder to repair than clappered blades. In terms of strategic lifters, repairability is a considerable factor.

I wouldn't rule it out, but it's unlikely.
 
Alfa_Particle

Alfa_Particle

Junior Member
Registered Member
Also, any idea on how classified the WS-19 is? I'm seeing figures get thrown around left right and centre claiming from 98 kN to 113 kN online.

@sunnymaxi, any idea? Not just the classification level, but just the engine in general also helps.
 
L

latenlazy

Brigadier
Alfa_Particle said:
- WS-13 isn't as classified as WS-15

- He claimed the changes are noticable to eye. I really don't see why he would lie about that.
Click to expand...
He might be equally misinformed. Without knowing his information source there’s no reason to assume he must be right. Especially if he doesn’t specify what the changes and differences are. People should earn their credibility, especially in this hobby.
 
Deino

Deino

Lieutenant General
Staff member
Super Moderator
Registered Member
Alfa_Particle said:
- WS-13 isn't as classified as WS-15

- He claimed the changes are noticable to eye. I really don't see why he would lie about that.
Click to expand...


The point is, I know he is very knowledgeable but if he is already credible is another story ... and concerning this collage (in fact made by me) I therefore added "reportedly WS-13" since it is based on a hint I got from a friend!

And if this is indeed a WS-13 as claimed, I see no major differences.

JF-17 + different engines.jpg
 
sunnymaxi

sunnymaxi

Major
Registered Member
Alfa_Particle said:
Also, any idea on how classified the WS-19 is? I'm seeing figures get thrown around left right and centre claiming from 98 kN to 113 kN online.

@sunnymaxi, any idea? Not just the classification level, but just the engine in general also helps.
Click to expand...
we have official confirmation from Chief designer. WS-19 total thrust will be 10 tons.

WS-13E aka WS-21 currently powered J-35 as interim engine have 9 tons of thrust. this is also confirmed by Chief designer..

52675160299_78bf89067f_3k.jpg

WS-21 is a advanced variant of WS-13 engine. incorporate latest components/material. improved life cycle , MBTO and thrust too. massively improved machine as compared to base variant..

WS-13/WS-21/WS-19 developed by ''Guizhou Aircraft Industry Corporation'' under AECC.. same institute is responsible for latest WS-17 engine for trainer aircraft..
 
Deino

Deino

Lieutenant General
Staff member
Super Moderator
Registered Member
sunnymaxi said:
we have official confirmation from Chief designer. WS-19 total thrust will be 10 tons.

WS-13E aka WS-21 currently powered J-35 as interim engine have 9 tons of thrust. this is also confirmed by Chief designer..

View attachment 126171

WS-21 is a advanced variant of WS-13 engine. incorporate latest components/material. improved life cycle , MBTO and thrust too. massively improved machine as compared to base variant..

WS-13/WS-21/WS-19 developed by ''Guizhou Aircraft Industry Corporation'' under AECC.. same institute is responsible for latest WS-17 engine for trainer aircraft..
Click to expand...


Do we have any detail in what the WS-21 differs to the WS-13? … and why it gained an independent designation as if it is even more modern than the WS-19?
 
D

davidau

Senior Member
Registered Member
I am a bit confused regarding different types of WS-XX engine, would someone please point out where each engine type is fitted to the various fighter jets?
 
You must log in or register to reply here.
Top