2019 is a little late to do wind tunnel testing on a design done in 2015. It would appear these tests were trying to determine how to fix the problems uncovered on the S-97 and carried over to the Defiant which has limited it to basically 200 kts (60 kts short of the X-2). We should know at AUSA in four days if they are making design mods to the Defiant to get closer to the 280 kt cruise required or scrapping the program outright.