Mr. Troll, can you qualify your statement in physical capabilities!
Sure I do
J-20 get an unique aerodynamic layouts: lifting-body canard blending in Gothic strake/leading edges.
The design has two very significant benefical features:
1, It will make the aircraft become highly-agile, based on Song's wind tunnel tests, when other factors are controlled, in terms of dog-fight performance/agility
, lifting-body canard blending with gothic strakes (J-20)>>short-distanced coupling canards (J-10, Raflale, JAS-39, MiG-1.44)>long-distance coupling canards (EuroFighter 2000)>Large gothic leading edges (F/A-18E/F, Chengdu JF-17/FC-1)>conventional layouts(including these with small leading edges, F-22/35, F-15, Su-27, etc).
2, The other primary benefits is, usually to creat large lifting force, you need large wing-span, however the large wing-span will create higher air-drag during high speed supersonic phase, which means there is some painful trade-off between sub-sonic agility and supersonic performance you have to made.
However, when you creates large part of your lift through the well blended gothic strakes instead of mostly created from the main wings like all the existing canard designs, based on Song's wind tunnel test, there will be a very special aerodynamic charater, that within certain degree, actually it will turn out to be, the LOWER the wing-span, the HIGHER the lifting force can be created.
Thus actually by designing the fighter this way, you can design a low-wingspan high-lifting fighter
which is BOTH optimized at dog-fight AND supersonic performance.
Song wen-cong, with his team memebers, published their works in 2001, based on large scale wind tunnel tests, you can find his academic journal paper on the key design features of J-20 in this paper, the key features(lifting-body canards blended into gothic-like strakes, all moving vectical tail wings, low wingspan, etc) mentioned in this 2001's jounral paper matched exactly with what we see the J-20 today, the link for this acadmeic jounral paper is here:http://www.cqvip.com/qk/83379x/2001008/5563683.html
The title of this paper, translated in English, is "A LOW WINGSPAN HIGH LIFTING, HIGH AGILE DESIGN OF THE NEXT GENERATION FIGHTER