J-20 5th Gen Fighter Thread V

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Hyperwarp

Hyperwarp

Captain
OK, I am cross posting from CDF. This is what SoC said:
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SOC said:
In the full-size, uncompressed GeoTIFF, it looks like twin engines. The engine bay looks just as wide as on the J-20, and there almost appears to be a visible gap between two exhausts.

in response to:
hyperwarp said:
Sean, could you tell whether it was single engined or twin engined? From that blurry image it looks like a single engine.
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SOC said:
1. Entirely possible. They could be trying to modify the shape to get the RCS as low as possible, perhaps for a "JH-20".

2. The lack of LERXs may be related to aerodynamic issues, possibly issues that would be exacerbated by a) moving the vertical tails forward (as in off of the now-absent tail booms), or b) 3D TVC use.

3. I did speculate that it could simply be incomplete. Hidden under a tarp likely wouldn't provide the exact dimensions as the J-20 or such clear edge definition.

Remember that they did rear-quarter signature work on the pole model at Gaobeidian. This could very well be the result of that work.

in response to:
deino said:
Given my very limited abilities to work with painting programs and even more with the images available, I tried my best to scale a regular J-20 (spotted at CAC on 18. July 2015) against this new model

And even if none of my theories are conclusive ... these are my 2 cents:

I have three theories:

1. a random RCS-experiment on a design loosely resembling the J-20 ... but WHY ?

2. indeed a modified J-20 maybe related to the final engine WS-15, a naval-version or whatever .... but since that type must be designed with the WS-15 in mind, I can't imagine requiring it such extensive modifications on the wing-patform to fit them??

3. what if this is a RCS model hidden under a tarpaulin and assisted by certain structures to make it look different ? ... but this won't explain the shortened tails.

As such, I don't have any idea
Deino
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dingyibvs

Junior Member
It looks more like they increased the sweep. Again, I'm no expert in this area, but increasing the sweep while keeping the wingspan effectively increases the wing area, so I don't know how that along w/ adjustments to leading edge slats can counteract the decreased lift associated with increased sweep.
 
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nemo

Junior Member
latenlazy said:
Or increase the sweep while maintaining wingspan? I can't tell from the picture though. Until I see something clearer I'm going to remain skeptical.
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I am questioning whether it's J-20 at all. Those drastic changes means test flight has to be redone again -- which does not fit with the consensus that J-20 is entering initial low rate production. I am more incline to think this is another aircraft -- single engine or even rumored vertical take off would make more sense.
 
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latenlazy

Brigadier
nemo said:
I am questioning whether it's J-20 at all. Those drastic changes means test flight has to be redone again -- which does not fit with the consensus that J-20 is entering initial low rate production. I am more incline to think this is another aircraft -- single engine or even rumored vertical take off would make more sense.
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SoC, who has a much better version of the photo, said it looks like it has two engines.
 
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