Chengdu J-20 5th Generation Aircraft News & Discussions

[Figaro]

Nice!

 

[onebyone]

Three Chinese model airplane enthusiasts have spent nearly 14 months to build their own J-20 stealth fighter in #Wuhan, Hubei province.

To build the 1:1 model, they have spent 200,000 yuan and used about 5 tons of steel meterial.

"You can't tell if it's a real one or a model 20 meters away," one of the creators said.

 

[Figaro]

 

[Deino]

2021????

 

[Figaro]

2021????

Not clear unfortunately ... photo quality isn't exactly the best and the J-20 appears to be quite zoomed out

 

[Figaro]

Can someone please translate???

 

[lmjiao]

Can someone please translate???

It is something translated from an American journal. I will try to find the origional. But actually, I think everyone here knows more than the author.

Can someone please translate???

This is the origional English report:
Link: http://www.popsci.com/china-stealth-fighter-new-engine

China's stealth fighter may be getting a new engine


Relying on Russian engines has put China at the mercy of a single, foreign supplier. That could be changing.

By Jeffrey Lin and P.W. Singer September 9, 2017

A FLIGHT SEEN AROUND THE WORLD

Two J-20s make the public debut of China's first stealth fighter, coming low over the Zhuhai runway.

dafeng cao (@xinfengcao)

With its J-20 heavy fighter, China became the second nation in the world (after the USA) to field a fleet of stealthy fifth generation fighters. But until recently, there has been a key limitation for the J-20 heavy fighter, and Chinese aerospace in general: a reliance on foreign engines. That's looks to be changing, quickly.

Images that just surfaced online show a new-built J-20 with stealthy WS-10 turbofan engines, which are developed and manufactured in China. These engines are distinguished by their serrated afterburner nozzles and interior flaps for manipulating the exhaust flow.

Once these new J-20s enter service, China will have comprehensively mastered the major parts of fighter technology, including radars, stealthy fuselage, missiles, computers, and engines.

WS-10A

The WS-10A, which powers the J-11 heavy fighters, is China's first operational low bypass, afterburning turbofan engines.

Errymath

Both prototype and production models of the J-20 fighter currently rely on an advanced variant of the Russian Al-31 turbofan engine. Using this tech since the fighter's first flight in 2011 has put China at the mercy of a single, foreign supplier. But not for much longer, it seems.

Photos of the new Chinese J-20, production number "2021," reveal turbofan engines that clearly belong to the WS-10 Taihang (built by Shenyang Liming). Among the shared features are the semicircle of small flaps, vanes for controlling exhaust flows, on the inner nozzle, and wider afterburning, variable geometry petals. The Russian Salyut AL-31 does not have those features.

Additionally, the WS-10X (possibly officially designated WS-10G or WS-10IPE) has sawtoothed serrations on the edges of its afterburning nozzles, like the F-35's F119 engine. The sawtooth edges provide a gain in stealthiness, as they redirect radar waves away from the nozzles. (The straight edges on non-stealthy engines like the AL-31 are major contributors to the radar cross section of a fighter).

In addition to the gains in stealth, the WS-10X is believed to provide about 14-15 tons of thrust. This may be enough power to allow the J-20 to engage in low supersonic supercruise at Mach 1-1.2 speeds. The Eurofighter Typhoon has a similar low supercruise capability, which means it can hit supersonic speeds without using fuel-thirsty afterburners.

The gains in engine connect to broader news in materials. The Chengdu Aerospace Superalloy Technology Company, a privately held corporation, made a major breakthrough in superalloy research. CASTC, according to the Global Times and People's Daily, is producing world class single crystal turbine blades from rhenium-nickel superalloys; adding rhenium to nickel increases the superalloy's melting point, allowing for a hotter and more efficient engine. High rhenium content superalloys are used in light weight, high thrust engines like the F-22 Raptor's F109 turbofan. Previously, the development of Chinese engines like the WS-10 were delayed as they suffered from quality control issues regarding single crystal turbine blades. China's mastery of the rhenium superalloy (and by the private sector, no less) won't just help China build current fighter engines, but also quickly research more capable, higher tech models.

 

[Figaro]

It is something translated from an American journal. I will try to find the origional. But actually, I think everyone here knows more than the author.



This is the origional English report:
Link: http://www.popsci.com/china-stealth-fighter-new-engine

China's stealth fighter may be getting a new engine


Relying on Russian engines has put China at the mercy of a single, foreign supplier. That could be changing.

By Jeffrey Lin and P.W. Singer September 9, 2017

A FLIGHT SEEN AROUND THE WORLD

Two J-20s make the public debut of China's first stealth fighter, coming low over the Zhuhai runway.

dafeng cao (@xinfengcao)

With its J-20 heavy fighter, China became the second nation in the world (after the USA) to field a fleet of stealthy fifth generation fighters. But until recently, there has been a key limitation for the J-20 heavy fighter, and Chinese aerospace in general: a reliance on foreign engines. That's looks to be changing, quickly.

Images that just surfaced online show a new-built J-20 with stealthy WS-10 turbofan engines, which are developed and manufactured in China. These engines are distinguished by their serrated afterburner nozzles and interior flaps for manipulating the exhaust flow.

Once these new J-20s enter service, China will have comprehensively mastered the major parts of fighter technology, including radars, stealthy fuselage, missiles, computers, and engines.

WS-10A

The WS-10A, which powers the J-11 heavy fighters, is China's first operational low bypass, afterburning turbofan engines.

Errymath

Both prototype and production models of the J-20 fighter currently rely on an advanced variant of the Russian Al-31 turbofan engine. Using this tech since the fighter's first flight in 2011 has put China at the mercy of a single, foreign supplier. But not for much longer, it seems.

Photos of the new Chinese J-20, production number "2021," reveal turbofan engines that clearly belong to the WS-10 Taihang (built by Shenyang Liming). Among the shared features are the semicircle of small flaps, vanes for controlling exhaust flows, on the inner nozzle, and wider afterburning, variable geometry petals. The Russian Salyut AL-31 does not have those features.

Additionally, the WS-10X (possibly officially designated WS-10G or WS-10IPE) has sawtoothed serrations on the edges of its afterburning nozzles, like the F-35's F119 engine. The sawtooth edges provide a gain in stealthiness, as they redirect radar waves away from the nozzles. (The straight edges on non-stealthy engines like the AL-31 are major contributors to the radar cross section of a fighter).

In addition to the gains in stealth, the WS-10X is believed to provide about 14-15 tons of thrust. This may be enough power to allow the J-20 to engage in low supersonic supercruise at Mach 1-1.2 speeds. The Eurofighter Typhoon has a similar low supercruise capability, which means it can hit supersonic speeds without using fuel-thirsty afterburners.

The gains in engine connect to broader news in materials. The Chengdu Aerospace Superalloy Technology Company, a privately held corporation, made a major breakthrough in superalloy research. CASTC, according to the Global Times and People's Daily, is producing world class single crystal turbine blades from rhenium-nickel superalloys; adding rhenium to nickel increases the superalloy's melting point, allowing for a hotter and more efficient engine. High rhenium content superalloys are used in light weight, high thrust engines like the F-22 Raptor's F109 turbofan. Previously, the development of Chinese engines like the WS-10 were delayed as they suffered from quality control issues regarding single crystal turbine blades. China's mastery of the rhenium superalloy (and by the private sector, no less) won't just help China build current fighter engines, but also quickly research more capable, higher tech models.

Thanks so much!

 

[grey boy 2]

J-20

 

[帅的一匹]

J-20

五代机拍出三代机感觉

 

[STRANGER BIRD]

Two hobbyists in Wuhan spent 14 months building a J-20 mockup.

 

[Figaro]

Two hobbyists in Wuhan spent 14 months building a J-20 mockup.

The first one has already been posted

 

[grey boy 2]

 

[Deino]

Again an idiot with too much time and not enough talent ...

Here's the original one:

 

[Figaro]

Again an idiot with too much time and not enough talent ...

View attachment 425160

Here's the original one:

View attachment 425159

How does one not notice? The cockpit ?!?!?! The J-20 had a different cockpit since 2017 prototype