J-20 5th Generation Fighter VII

minusone said:

I think he deliberate PS two ws-15 nozzles, so that yall would think it's fake. The real image as per above, is only fitted with one ws-15.

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The image I shared above was already shared months ago.

latenlazy said:

You misunderstand. We know there’s a J-20 with one TVC nozzle, with an engine that we can’t identify but we think might be the WS-15. But we have yet to see a J-20 with two TVC nozzles installed. The image you shared is almost certainly a ps of the one below.

View attachment 103885

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Indeed it is

Here is the unpopular idea/one of possible explanation regarding the "J-20B" hump behind the cockpit.
It's the compensation for the increase fuel consumption of WS-15.

minime said:

Here is the unpopular idea/one of possible explanation regarding the "J-20B" hump behind the cockpit.
It's the compensation for the increase fuel consumption of WS-15.

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Possibly, especially if WS-15 has a very low bypass ratio like the F-119, which has the nickname of "leaky turbojet".

minime said:

Here is the unpopular idea/one of possible explanation regarding the "J-20B" hump behind the cockpit.
It's the compensation for the increase fuel consumption of WS-15.

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Here's an idea: It's an improvement that can be made with no reason not to make it.

ZeEa5KPul said:

Here's an idea: It's an improvement that can be made with no reason not to make it.

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Nah, they arent gonna re-tool everything just so they can just make it. That in itself alone is not an efficient reasoning.

IIRC, the paper about the hump also said that it increases lift at low speeds, which was very desirable for a carrier based aircraft.

So, my speculation is that J-20B can launch from shorter runways.

minime said:

Here is the unpopular idea/one of possible explanation regarding the "J-20B" hump behind the cockpit.
It's the compensation for the increase fuel consumption of WS-15.

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All the "hump for fuel" ideas are based on one assumption that the baseline J-20 has its main fuel tank just behind the cockpit. In that case increasing the thickness of the tank by 10cm at maximum thickness (center line) would give some meaningful volume.

If there is no fuel tank to begin with, one need to not only add a tank but also pumps and tubes to move fuel around to balance the center of mass. Therefor a max 10cm thickness but quickly tapering volume is not going to add meaningful volume of fuel. It is just wasteful.

Volume is nothing unless it is in a desirable shape. Think about this, 10cm increase of depth of your car's back trunk or 10cm increase of leg room in the cabin, both equally increase the length of the car, which one gives you more volume for carrying luggage?

This logic also applies to the "increased room for electronics". Electronics are not plasticine that can be fitted in any volume.

phrozenflame said:

Nah, they arent gonna re-tool everything just so they can just make it. That in itself alone is not an efficient reasoning.

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Without re-tooling, how could there be a new variant of the aircraft?

"All J-20s participating in the Airshow China 2022 were equipped with domestically developed engines, and the avionics were completely upgraded to the latest version," said Major Li Weipeng, a J-20 pilot, at a press conference at the Airshow China 2022 in Zhuhai, South China's Guangdong Province in November.

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The aircraft in question:
Edit:
Even regular J20s can take off from very short sections of runways:

Photographers who have seen landings and takeoffs of other warplanes told the Global Times at the air show site that the runway distance required for the J-20 to take off and land is very short.

This is of tactical significance because in combat, a runway could be targeted and damaged, and using only a small portion of undamaged runway to take off and land can greatly increase the warplane's operational capability. At the same time it could reduce the risk of getting hit during the process, analysts said.

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