Well everyone has said WS-15 was done by XAE, since however many years ago it was first rumoured to exist.
J-20... The New Generation Fighter III
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Well everyone has said WS-15 was done by XAE, since however many years ago it was first rumoured to exist.
It's interesting because WS15's state secret classification seems to be on the same level as the strategic bomber since the manufacturers are not even allowed to hint anything in any types of news, i.e they can't even mention "new type of engine" in any sort of the public media outlet. No one dares to share the information on public forums neither, much like 2001's progress at Yanliang.
Of course it can. Only those who don't understand physics and bases their aeronautics knowledge entirely on snippets from the internet can't understand that.
There are indeed stealth disadvantages to having canards, but they have more to do with surface-hugging radar waves.
What about this sign a few years back?
Anyway, the fact that it may be very classified could be why we've heard nothing about it in so long. The engines to J-20 would be considered an important secret, not unlike how the F119s are the secret to F-22's performance, WS-15 will be similar (perhaps to a lesser degree as J-20's advanced aerodynamics are a greater factor too).
To answer your last question first----there is really no way that TVC will increase thrust, it merely deflects exhaust gases to enhance aircraft control----the engineer is correct when he asserts that there is a minimal reduction in thrust as the exhaust gases lose energy when they encounter the deflected nozzle. He is also correct when he points out that TVC increases maintenance and complexity- while it enhances control authority of the aircraft.
In normal flight operations the FCS sytem commands the flight control actuators to "couple the canards and elevons together", the application of aft stick for instance will deflect the canard upward, while the elevons deflect upward to push the tail down,,,,the application of forward stick will deflect the canard downwards and the elevons will also deflect downwards to deflect the tail up,,,,,the canards pulling and the elevons pushing so to speak. Application of slats and flaps will cause the the leading and trailing edge flaps on the main wing to deflect downward to increase lift, in that configuration, the FCS might "prioritize" the pitch control to the canard, it really depends on how the engineers "schedule" the FCS. This is gross oversimplification, and why I have referred to the J-20 as a very "smart" airplane, Dr. Song states that the FCS is quite complex, and many of his innovations occur in the FCS.
Thanks, the part about the FCS was very informative.
Regarding the TVC, well, that's what I thought. MiG-29 insists otherwise, and I was curious why.
Can this be moved to a new thread please? Or is there already a TVC thread? I only saw an aerodynamics thread, but it looks like that died.
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MiG-29
Banned Idiot
let us make another thread and i can post to you that Air force Brat is wrong Thrust vectoring does indeed increase thrust in fact i can prove you with this simple analogy, you can reduce or increase thrust just changing the shape of a nozzle but let us make the new thread i will make it and if you want we discuss this there
here is thread
http://www.sinodefenceforum.com/air-force/thrust-vectoring-stealth-fighters-does-matter-china-s-new-j-20-j-31-a-6142.html#post204760
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As mentioned earlier there seemed to be no reference to F22 problems during the recent Red Flag encounters with the Eurofighters in one-on-one dogfights, so I would say that is a pretty good indication that the problems have been solved
The paper was pretty detailed as Dr Song covered all the bases regarding building a modern 5th generation fighter. One thing that stood out for me was a reference to the F-15 ACTIVE which had TVC and Canards. My guess is that Dr Song studied this aircraft extensively.
F-15 ACTIVE on a test stand showing its 3D Pitch Yaw Balance Beam Nozzles (P/YBBN). These nozzles are mounted on the stock F100-299 engines and provide 20 degrees of thrust vectoring in any direction.
Engineer
Major
Wrong. F-22 is the benchmark for the simple reason that it is the first 5-th generation aircraft and the only such aircraft in operation.
The J-20's designers anticipated potential problems in the development of F-119 class engine, thus chose to compensate with very sophisticated and advanced aerodynamics. J-20 features the most numerous vortex generators on any aircraft seen so far, with a total of four pairs from the chine, strake, canard, and LERX. Such design intends to provide large amount of lift especially at high AoA situation. This lift along with thrust are what enable an aircraft to turn and out maneuver another fighter, not TVC.
If WS-15 delivers the requirements, then the combination of advanced aerodynamics and powerful engines will enable J-20 to out maneuver the F-22. If not, the aerodynamics will enable the J-20 to handle itself visa-versus an F-22.
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