It is interesting to note the flight reached or exceeded VMO/MMO.
Was it a flutter test on 2nd June 2020?
Sorry, I do not know. I purely rely on data from about 3-5 sources (some of them might have an insider by the looks of it), but I don't have an 'insider.' Wish I did lol.
According to this it was HPT ACC testing on June 2 (and no, I don’t know what that means but I’m sure someone on here does).
Also 777-9 N779XW is scheduled for stability and control testing on June 4, supported by photo and chase.
Source: http://kpae.blogspot.com/2020/06/paine- ... 3.html?m=1
HPT like High altitude performance test?
ACC like acceleration capability?
The flight on 2 June 2020 was at around 38,000 ft and the speed varied a lot, accelerating and decelerating during all three phases; climb cruise descent.
I do not know what they were doing. Perhaps they want to confirm the mathematical high-speed performance model.
Can anyone say something about the test of 2 June 2020?https://www.flightradar24.com/data/flig ... 2#249e3892