What's in There?
Protruding refueling probe eliminate the possible failure of mechanism for retractable. Yes, it causes drag but the good point is there. Rafale too opt for this option. PLAN is always practical. If you want retracble refuleing probe. Wait for J20, cause the protruding probe is sure bad for RCS..
Why are you so interested/excited by this manoeuvre ? Is it a rare spectacle? technically difficult? does it demonstrate significant developmental achievement with regards the aircraft ? Educate me please if you don't mind.
I don't get how combining a roll with a vertical climb shows how capable the engine is compared to just a vertical climb on it's own.Is this the 1st time we have seen any such vertical climb with a WS-10 in a J10?J-10B with WS-10 engine doing a roll while going up vertically. Critics of Chinese engines could zip it for now: