Are we sure they're not the same type as the WS-10X seen on the J-10B testbed? It makes little sense to develop two separate variants, one with TVC and one without, when both the J-20 and the J-10X are likely to feature TVC.
Now there's a drawing.reliable source (铁背心) from FYJS claims J20 is seen equipped with TVC nozzle today. Ground test is imminent.
edit: I just looked at some J20 watcher and photographer on weibo, they confirmed that one TVC equipped J20 is spotted at CAC. However, no picture of the aircraft has been seen on the internet yet so we will have to wait a bit.
J-10: Big bro, I finished testing the new petals for you, it feels really powerfulNow there's a drawing.
View attachment 46103
What happened to the Yellow J-20 with sawtooth petals some month ago? That wasnt already TVC? Maybe it was only for testing the sawtooths and not TVC after all, which is why it has flown with two of those engines already installed instead of one, as suggested by the manhua image.
Now there's a drawing.
View attachment 46103
I'd like the hear the Eng's take on this, Eng??
one of our few aerodynamic area's of disagreement,, it would also tell us the canard alone did NOT bring them the pitch authority they were seeking??