Chinese Engine Development

W

Wolverine

Banned Idiot
Lundblad.Jeff said:
Also, note, as I have pointed out before, that the J-11B has no green primer (unlike the prototype). I do not believe that composites ever made it into the production version. (Nor do I believe they really reduced the RCS to 5 meters, but that is another story).
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I don't know how you could make that conclusion just from the primer coat, especially when you don't know what stage of production the plane is at. Also I've not heard that composites reduce RCS. I have heard that shaping and RAM reduce RCS, which is possibly what the J-11 uses. The Su-27's major RCS contribution is the turbine blades, and hiding a large portion of this area from view will reduce frontal RCS by alot.
 
S

Skywatcher

Captain
Yeah, that is the WS-10A. Maybe the AL-31F's turbine blades were less prone to reflecting radar waves compared to the WS-10A?
 
Blitzo

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Lundblad.Jeff said:
It appears to be on the finished J-11B in the background as well.
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Didn't we hear that the first operational J-11B's had their WS-10A's switched to Al-31's due to reliability issues or something? The finished J-11B in the background looks to be in a production hanger (or equivalent), maybe the ones in the hanger were the first set to be delivered? (therefore when they were given to the PLAAF, they found the problems with the WS-10A and then replaced with russian engines)

Don't get me wrong, I'd love to see J-11B's flying with WS-10A's (and J-10's), but I don't think that this particular picture gives any definite evidence that J-11B's are equipped with WS-10A's SUCCESSFULLY.
 
tphuang

tphuang

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kroko said:
just because its in one plane (prototype j-11bs) doesnt mean that it is operational.
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there is an official article that said J-11B uses both WS-10A and AL-31F. Check the flanker thread.

Well, my main point was wondering if what I see is the WS-10a. I don't know anything about the primer, just that only one of the prototypes seemed to have composite and all production models we have seen since don't seem to (nor does the j-11bs prototype). I know composites do not reduce rcs, but there are zero visible modifications to the airframe that indicate rcs reduction measures on the J-11B. I know they could have done something with the intake, but I highly doubt that alone would cut the rcs down from 15 sq. m to 3-5 sq. m, but I'll leave that to people who know about that stuff.

We heard that the J-11b had ws-10a for a long time, that turned out not to be true. Personally, I think that in an effort to make the plane seem less of intellectual property infringement, they have exaggerated its "improvements" over the su-27. The only thing we can be sure of is that it has a new radar and avionics...that's it. Now maybe from this photo we have confirmation that it is using WS-10a. Anyway, am I blind or does that look like the ws-10a engine that was used on the j-11bs prototype.
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there is no official source that J-11B has reduced RCS to that level. If you chose to accept JDW as the gospel, you are going to be disappointed quite often.

They put WS-10A on J-11B because they want to be independent of foreign suppliers and to let WS-10A become mature.
 
Roger604

Roger604

Senior Member
Bltizo said:
Didn't we hear that the first operational J-11B's had their WS-10A's switched to Al-31's due to reliability issues or something? The finished J-11B in the background looks to be in a production hanger (or equivalent), maybe the ones in the hanger were the first set to be delivered? (therefore when they were given to the PLAAF, they found the problems with the WS-10A and then replaced with russian engines)

Don't get me wrong, I'd love to see J-11B's flying with WS-10A's (and J-10's), but I don't think that this particular picture gives any definite evidence that J-11B's are equipped with WS-10A's SUCCESSFULLY.
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It makes no sense for PLA to publicize shots of WS-10A installed on J-11's that they later had to replace.

It does make sense for the PLA to publicize shots of J-11B's with WS-10A after mass production begins.

It fits right into place with many Chinese language sources stating that WS-10A entered service finally at beginning of 2009.
 
Blitzo

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Roger604 said:
It makes no sense for PLA to publicize shots of WS-10A installed on J-11's that they later had to replace.

It does make sense for the PLA to publicize shots of J-11B's with WS-10A after mass production begins.

It fits right into place with many Chinese language sources stating that WS-10A entered service finally at beginning of 2009.
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I'm not sure if those pics of J-11B being in the centre counts as having WS-10A publicized.
We'll know the WS-10A is completely successful when CCTV broadcasts a documentary on it, like they did with the JF-17 and J-10 a while after they were successful.
 
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maya

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maya said:
chief designer zhangenhe in the general assembly workshop of fws10/taihang (mass production)
27_77564_f709743a107baab.jpg
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