It's for J-20 Replying to: Does its size -- Khan Post ReplyForum motif 04/10/2021, 02:02:02 Author Profile | Edit A new jet engine first carry out ground test, then fly on testbed aircraft, before testing on the intended user. Some people said WS-15 already progress beyond flying testbed. I wonder what it is. Recommend | Alert | 5 4 3 2 1 0 -1 -2 -3 -4 -5 Where am IGo Up Go TopPost ReplyBack

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