J-20 5th Gen Fighter Thread VI

[taxiya]

Hi all,

I was looking at pictures of the J-20 and realised that the aileron actuators are 'slanted' relative to the longitudinal axis in the production models. They were 'parallel' in the early prototypes.
Anyone know what the reason could be?

And could these bumps be eliminated in the future similar to the FC-31's fully flush design?

For comparison to other aircraft;

good catch.
As to the highlighted question, only F-35 can do so because only F-35 and J-31 has one piece aileron. J-31 may put the actuators inside the side booms and use the limited space in the wing to house a rotation bar. F-35 can do the same if needed.

All other jets, J-20, F-22 and Su-57 have two piece ailerons, the inboard ones can do the same if the booms have enough "thickness", but the outboard bumps will remain unless some "dark" technology exists to miniaturize the actuators.

The next natural question would be why the one piece vs. two pieces ailerons? My guess is that the different performance requirements of the two type of aircraft (based on current aerodynamic knowledge) dictates the choice. Air Superiority vs. Multirole. Given the same understanding of how air flow works, one choice is always superior other the other in their given requirement.

 

[siegecrossbow]

Hi all,

I was looking at pictures of the J-20 and realised that the aileron actuators are 'slanted' relative to the longitudinal axis in the production models. They were 'parallel' in the early prototypes.
Anyone know what the reason could be?

And could these bumps be eliminated in the future similar to the FC-31's fully flush design?

For comparison to other aircraft;

My guess would be planform alignment.

 

[Air Force Brat]

My guess would be planform alignment.

Yes indeed siege, and likely they are aligned with the actual airflow which tends to flow toward the wing tips or outboard,, they could also reduce RCS with the new alignment..

If folks will notice, the external "stringers" for additional rigidity on the SU-57's horizontal stabilizers are also angled outward in the same manner.

so the FC-31 and F-35A and B do indeed likely have those actuators inboard, the Charlie likely has a pair of actuators outboard for the ailerons

 

[Blitzo]

According to PB19980515 the future J-XY (which he heavily suggested is derived from the FC-31) has the lowest RCS of all Chinese fighter aircraft.

I haven't been keeping such a close track of BBS big shrimps lately, but I've noticed that fellows name coming up a bit recently that I personally had not noticed before.

I'd just like to field an open question to everyone that we have a reason to trust his claims, i.e.: that he does have a record of reliability or has displayed a history of insider knowledge that has eventually borne fruit?

 

[SinoSoldier]

I haven't been keeping such a close track of BBS big shrimps lately, but I've noticed that fellows name coming up a bit recently that I personally had not noticed before.

I'd just like to field an open question to everyone that we have a reason to trust his claims, i.e.: that he does have a record of reliability or has displayed a history of insider knowledge that has eventually borne fruit?

According to what I've been told, he was directly involved in collecting data for the J-15's flight tests at sea, and that he has actually been on sea trials (presumably on the Liaoning). In terms of track record, he made a prediction in 2014 (posted in this forum as well) that the J-15's AESA radar would begin assembly by 2016, which is what exactly happened.

 

[jobjed]

J-15's AESA radar would begin assembly by 2016

When did we get confirmation of this?

 

[Blitzo]

According to what I've been told, he was directly involved in collecting data for the J-15's flight tests at sea, and that he has actually been on sea trials (presumably on the Liaoning). In terms of track record, he made a prediction in 2014 (posted in this forum as well) that the J-15's AESA radar would begin assembly by 2016, which is what exactly happened.

Well, let's try to go by track record exclusively as that's the only thing we can really measure.

Is the J-15 radar prediction the only one he's made that is being touted as evidence, because did we ever get any confirmation (photos etc) of J-15's AESA beginning assembly in 2016?

I'm just a bit confused as to why his name has been thrown around in WRT Chinese naval aviation like he is the equivalent of pop3 or fzgfzy for Chinese naval shipbuilding matter, when I personally am not aware of any longstanding confirmed predictions that he's made.

 

[SinoSoldier]

When did we get confirmation of this?

Reported by Henri K:

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[SinoSoldier]

Well, let's try to go by track record exclusively as that's the only thing we can really measure.

Is the J-15 radar prediction the only one he's made that is being touted as evidence, because did we ever get any confirmation (photos etc) of J-15's AESA beginning assembly in 2016?

I'm just a bit confused as to why his name has been thrown around in WRT Chinese naval aviation like he is the equivalent of pop3 or fzgfzy for Chinese naval shipbuilding matter, when I personally am not aware of any longstanding confirmed predictions that he's made.

It's one of the examples of his predictions that I found and could actually follow up on. Judging from his reputation among other forumers, he probably has other accurate predictions under his belt.

No photo confirmations of the J-15's AESA, but Henri K. was able to extract a Chinese document that the radar had begun development in July of 2016.

 

[Air Force Brat]

I haven't been keeping such a close track of BBS big shrimps lately, but I've noticed that fellows name coming up a bit recently that I personally had not noticed before.

I'd just like to field an open question to everyone that we have a reason to trust his claims, i.e.: that he does have a record of reliability or has displayed a history of insider knowledge that has eventually borne fruit?

a very good question?