Not exactly related, but in another post he commented that there might be a chance for 2D TVC for J-20A's after all??
View attachment 123330(Sorry I don't have a translation software so there might be localization errors)
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How do you know it wasn't installed already (he was replying to a comment about 2D TVC on WS-19)
It's installed on WS-19 already? Really? Shame it isn't installed on WS-15.
Who says it wasn't installed
Orca inferred from Director Yang's (J-20 designer) seminar that the J-20 doesn't need 2D TVC, although Shenyang Aero Engine's study paper proved that WS-15 with TVC had excellent results in ground tests.... (not a part of the translation but personally I don't 100% agree with Orca's interpretation)
Well, it was the J-20. Didn't say it was the J-20A