China Flanker Thread II

[kroko]

The last picture is nice, why? It clearly shown J-15 can have its wing folded.. I find it ridiculous some slayer keep demanding picture of real J-15 to have its wing fold. Even without this picture, there is no doubt J-15 can have its wing folded for CV operation and storage.

Can anyone confirm what engines are these j-15 using? It seems to me be Al-31, but not sure. If so, why are they using it?

 

[Franklin]

Can anyone confirm what engines are these j-15 using? It seems to me be Al-31, but not sure. If so, why are they using it?

Yes, these planes are using the AL-31 engines there are a few good photo's that shows it on the carrier thread.

 

[LesAdieux]

The last picture is nice, why? It clearly shown J-15 can have its wing folded.. I find it ridiculous some slayer keep demanding picture of real J-15 to have its wing fold. Even without this picture, there is no doubt J-15 can have its wing folded for CV operation and storage.

did anyone notice the logo on the J-15? is that the nuke logo? what does that mean?

 

[Engineer]

did anyone notice the logo on the J-15? is that the nuke logo? what does that mean?

Those are targets used by ground instruments for tracking and estimating attitudes.

 

[Lion]

Can anyone confirm what engines are these j-15 using? It seems to me be Al-31, but not sure. If so, why are they using it?

They are AL-31 engine. If you noticed the prototype number, they are the pioneer batch of prototype that uses russian engine. Another case of China in prudent of spending, they just save cost of refrofit the engine with domestic WS-10H engine and uses what is already there. From pt 555 , all will be using WS-10H. All serial production J-15 will be using WS-10H.

 

[Engineer]

Can anyone confirm what engines are these j-15 using? It seems to me be Al-31, but not sure. If so, why are they using it?

Those are early prototypes that use AL-31 engines. AL-31 engines are used because that's mainly what the original Su-33 used and can dramatically cut down on the amount of flight tests needed.

There are J-15s that use WS-10H too, but they essentially require flight testings from scratch to validate the flight characteristics. This is a lengthy process, which is why J-15 with AL-31 are being used for training at the moment.

 

[plawolf]

Those are early prototypes that use AL-31 engines. AL-31 engines are used because that's mainly what the original Su-33 used and can dramatically cut down on the amount of flight tests needed.

There are J-15s that use WS-10H too, but they essentially require flight testings from scratch to validate the flight characteristics. This is a lengthy process, which is why J-15 with AL-31 are being used for training at the moment.

I don't know about starting from scratch. The J15 is a new bird, but it uses enough of the basic Su27/J11 airframe that a lot of the FBW coding can be ported over relatively easily.

There still needs to be extensive flight testing to take into account the different weight, balance and the addition of canards etc, but those are tweaks rather than starting from scratch, and consequently should not take anywhere as long to complete flight testing.

 

[Engineer]

I don't know about starting from scratch. The J15 is a new bird, but it uses enough of the basic Su27/J11 airframe that a lot of the FBW coding can be ported over relatively easily.

There still needs to be extensive flight testing to take into account the different weight, balance and the addition of canards etc, but those are tweaks rather than starting from scratch, and consequently should not take anywhere as long to complete flight testing.

Different engine types have different characteristics; different time to spool up for example. Consequently, there will be different acceleration characteristics leading to different aircraft dynamics and response. In turn, those require alteration in the FBW to compensate which requires re-test of the FBW itself. The engineers would need to make sure the aircraft, engine and flight control systems are all compatible with each other for the entire flight envelop. That is why I say adopting new engine type essentially requires the flight tests have to be flown from scratch.

 

[Curious George]

This has probably been asked before, but since the WS-10A is shorter than the Al-31F, why didn't they shorten the "stinger" of the J-11B's that were equipped with WS-10A so that it's more proportional? How would shortening it have affected the J-11B's performance? I know that's where they house the parachute, but I think that there's enough room for shortening it since they've done it to the J-15's "stinger".

 

[Deino]

They are AL-31 engine. If you noticed the prototype number, they are the pioneer batch of prototype that uses russian engine. Another case of China in prudent of spending, they just save cost of refrofit the engine with domestic WS-10H engine and uses what is already there. From pt 555 , all will be using WS-10H. All serial production J-15 will be using WS-10H.

Seems as if already #554 has the TH !