J-20 5th Gen Fighter Thread VIII

[talonn]

More of 78139, we've seen this young gun a couple times now
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Is the paint scheme darker than previous batch or is it the lighting?

 

[Mearex]

Just in: CCTV released footage of J-20 No.2001 maiden flight.

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wish they kept the bow-less canopy

 

[FirebirdFan]

Is the paint scheme darker than previous batch or is it the lighting?

it is darker indeed

 

[Engineer]

Best to use the term radius if we are being strict. None of the properties implied by a limit (mathematically at least) apply here.
Not that said emotions really matter much—an ideal scenario to me would be the West viewing Chinese equipment like the Indians.

Beleidigteleberwurstspielbegrenzungschild

 

[00CuriousObserver]

Not that I'm explicitly challenging the authenticity of this (as timing of the release of such imagery and the quality of this imagery are reasonable), but who was the original poster of this?

It probably circulated via 牧星观海天; there is a gif of it. I suspect it came from a recently released video somewhere, but I haven't seen anyone link the particular video.

Via 052D成都舰: The vertical tail hasn’t had its corners clipped, the insignia sits higher up, the exhaust/nozzle is painted white, there’s a number on the nose, and there’s a pitot tube on the tip—this is an ancient clip of prototype No. 2002 doing bomb-release testing.

https://imgur.com/a/617TGNY

 

[learner123]

Not sure if this has been answered before, but why didnt the j20 use ws 10 engines right from the start as an intermediary instead of the al 31? I understand that the ws-10a is similar in dimensions to the al-31?

 

[bsdnf]

Not sure if this has been answered before, but why didnt the j20 use ws 10 engines right from the start as an intermediary instead of the al 31? I understand that the ws-10a is similar in dimensions to the al-31?

WS-10A completed its design finalization tests in the second quarter of 2009 and its production finalization tests in the fourth quarter of 2010, while the J-20 demonstrator made its maiden flight in 2011. Just like the J-36-01 likely still using the WS-10C, there simply wasn't enough time.

 

[latenlazy]

WS-10A completed its design finalization tests in the second quarter of 2009 and its production finalization tests in the fourth quarter of 2010, while the J-20 demonstrator made its maiden flight in 2011. Just like the J-36-01 likely still using the WS-10C, there simply wasn't enough time.

The WS-10 had serious teething issues going into the mid 2010s, and wasn’t really a fully reliable product until the late 2010s.

 

[learner123]

WS-10A completed its design finalization tests in the second quarter of 2009 and its production finalization tests in the fourth quarter of 2010, while the J-20 demonstrator made its maiden flight in 2011. Just like the J-36-01 likely still using the WS-10C, there simply wasn't enough time.

I am referring to the first 2 LRIP batches of J-20s produced 2016-2018, using russian Al31FM2 engines, when the j-16 also a twin engined fighter, at that point in time had been produced for 4 batches with WS-10b engines.

The WS-10 had serious teething issues going into the mid 2010s, and wasn’t really a fully reliable product until the late 2010s.

So to draw a conclusion, later variants of the al31s were more reliable then the initial ws-10b on the frist few batches of the j-16? or were there other reasons as to why the first two batche of j-20s were produced with russian engines?

 

[plawolf]

I am referring to the first 2 LRIP batches of J-20s produced 2016-2018, using russian Al31FM2 engines, when the j-16 also a twin engined fighter, at that point in time had been produced for 4 batches with WS-10b engines.

So to draw a conclusion, later variants of the al31s were more reliable than the initial ws-10b on the frist few batches of the j-16? or were there other reasons as to why the first two batche of j-20s were produced with russian engines?

You do realise you can’t just swop engines like you change underpants right?

It takes a lot of time to redesign the airframe to take a new engine, even when provisions were originally made in the base design. Once you have installed the new engines you need to re-do a lot of the test flights for evaluation and validation. All of that can take years.

When you put a fighter into LRIP, the base design would need to be frozen, with the focus on quality control and production ramp up.