J20 Stealth Fighter

SexyChineseLady

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Care to educate us, please: exactly from which part of those blurry pictures you (or that tweeter) can draw assertion it's WS-15 (NOT WS-10)? And even BOTH!!
The photographer who took the original pictures (and then blurred them) said they were WS-15s according to tge Tweeter :)
 

SexyChineseLady

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Actually, while your words held definitely true (about load of fake news & claims), there are also tons of Chinese military web sites & observers who been very critical & careful about facts (Facts, please) checking. And b'cos of that, I respect them. Just hope our Chinese friends on this forum also look up to that standard, and improve this site.
The WS-10 when it was first put on a J-20 was blurred too! But then the production photos came out. It takes awhile for the officially release to come. This is just fun speculation ;)

You can wait if you want. Almost every rumor in the past few years had come to pass in pretty short order though -- WS-10TVC. WS-10B on J-10. WS-10C on J-20. WS-20 on Y-20.

Now WS-15 on J-20 :D
 

Alien_cat26

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Actually, while your words held definitely true (about load of fake news & claims), there are also tons of Chinese military web sites & observers who been very critical & careful about facts (Facts, please) checking. And b'cos of that, I respect them. Just hope our Chinese friends on this forum also look up to that standard, and improve this site.
This expectation is more difficult to achieve...
This is the conclusion of 10 years of observation
 

MiG-29SMT

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Don't know... Looks like two different turbo fans to me. One has the distinctive blue/white afterburner bloom of the WS10 and AL31.

The orange bloom is new... That'd probably be the WS15 🤷‍♂️
that is not even a real proof, the color will depend in the temperature and fuel chemical composition see fuel composition, to claim is WS-15 is a joke for stupid people.


Color of a flame depends on various factors such as temperature, fuel composition and oxygen proportion during the combustion. Different parts of the flame will have different colors depending on thetemperature


1631228711706.png




1631228733693.png
 

MiG-29SMT

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Don't know... Looks like two different turbo fans to me. One has the distinctive blue/white afterburner bloom of the WS10 and AL31.

The orange bloom is new... That'd probably be the WS15 🤷‍♂️
Blue flame vs yellow flame color is a question of complete combustion vs incomplete combustion. LPG (propane) and natural gas (methane) flame colour are both blue. A blue flame color and temperature means complete combustion. Red flames or yellow gas flame color may be a sign of incomplete combustion, wasted gas and a serious safety hazard. Blue flame vs orange flame, blue flame vs red flames and blue flame vs yellow flame are all the incomplete combustion issue.
Blue flames are good.
Red flames and yellow gas flames… not so much…



1631229746122.png



read a bit stop the chinese forumlore idiocies, the picture is totally inconclusive and frankly idiotic, unless you have a good picture that is just a unproven fact
 

MiG-29SMT

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Possible J-20B with all WS-15 engines is being tested!

Maybe two WS-15s unlike earlier tests which had one WS-10 and one WS-15 for safety.

1631230810249.png


1631230844147.png


Since the flame is whiter thus Su-30 has more poweful engines than J-20 of course that is a stupid argument but claiming that is WS-15 for a blurry picture it looks more propaganda and fake news that a legit claim.

1631231137820.png


A blue flame might correspont to a temperature, a new chemical element or compund in its fuel or better burning, difficult to tell even in a known engine, but on a blurry picture it is more a joke than a fact
 

J20!

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that is not even a real proof, the color will depend in the temperature and fuel chemical composition see fuel composition, to claim is WS-15 is a joke for stupid people.


Color of a flame depends on various factors such as temperature, fuel composition and oxygen proportion during the combustion. Different parts of the flame will have different colors depending on thetemperature


View attachment 109379




View attachment 109380
The picture is not too blurry to see that both engines are installed on the same airframe. How can fuel composition differ between the two engines when they're using the same fuel source? 🙄

Those are obviously two different engines. I'm sure you tried and couldn't find a twin engine at full afterburner with 2 different color afterburner blooms.

And no one said it's conclusive. Its an internet rumor, relax... If it is a WS15, we'll see pics sooner or later. If not... 🤷‍♂️
 
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SexyChineseLady

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The picture is not too blurry to see that both engines are installed on the same airframe. How can fuel composition differ between the two engines when they're using the same fuel source? 🙄

Those are obviously two different engines. I'm sure you tried and couldn't find a twin engine at full afterburner with 2 different color afterburner blooms.

And no one said it's conclusive. Its an internet rumor, relax... If it is a WS15, we'll see pics sooner or later. If not... 🤷‍♂️
Someone said the blurred picture is from the July test with WS-10C on one side and WS-15 on the other -- just like the J-11 test years ago with the AL-31 on one side and the WS-10 on the other.

But the recent test is different. It is a J-20 with two WS15s. All rumors so far :D
 

MiG-29SMT

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The picture is not too blurry to see that both engines are installed on the same airframe. How can fuel composition differ between the two engines when they're using the same fuel source? 🙄

Those are obviously two different engines. I'm sure you tried and couldn't find a twin engine at full afterburner with 2 different color afterburner blooms.

And no one said it's conclusive. Its an internet rumor, relax... If it is a WS15, we'll see pics sooner or later. If not... 🤷‍♂️
Fuel combustion + temperature it means that it can have the same engine at two different power settings, one failed or deliverately was set at lower power settings does it mean it is another engine? not necesarily in fact assymetry do affect the aircraft directional stability, it makes it spin, tell me why they will try to make a prototype test it with assymetric thrust when they are pretty expensive?

This MiG-29 keeps both engines at the same setting to keep its flight stable


1631324563000.png

The asymmetric thrust will cause a powerful moment, M, that forces the aircraft to yaw toward the dead engine.

10.2.5 Continued takeoff with single engine failure

In the event of an engine failure during the takeoff roll the pilot must decide whether to continue the takeoff or instead abort the takeoff and decelerate to a stop on the runway. Obviously, if the engine failure occurs when the aircraft is traveling very slowly, the aircraft should be kept on the ground and brought to a stop at some safe location off the runway.
 
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MiG-29SMT

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The picture is not too blurry to see that both engines are installed on the same airframe. How can fuel composition differ between the two engines when they're using the same fuel source? 🙄

Those are obviously two different engines. I'm sure you tried and couldn't find a twin engine at full afterburner with 2 different color afterburner blooms.

And no one said it's conclusive. Its an internet rumor, relax... If it is a WS15, we'll see pics sooner or later. If not... 🤷‍♂️
Effects
If a multi-engine aircraft suffers engine failure when airborne, there are two immediate aerodynamic effects. The initial effect is the yawing that occurs due to the asymmetry of the thrust line. The size of this initial yawing moment depends upon the engine thrust and the distance between the thrust line and the aircraft centre of gravity. The yawing moment is also affected initially by the rate of thrust decay of the ‘dead’ engine and ultimately by its drag. In addition, the yaw is aggravated by the drag effect of the windmilling propeller. The total moment can be very large, particularly when the airplane is at high power and low speed.


remember top gun?

Could they be two different types of engines? yes the one in afterburner and the one without it but they must keep the same thrust.

It does not prove anything or that it is WS-15
 
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