Washout built into the wings of the Ta-152H

[Pilot]

The fact that it flew, mean it can be airborne. This washout helps with higher angle of attack and they are for sure included in high altitude flight envelope (air is less dense there). During the airfoil test in wind tunnel, result are made and diagrams for the various angle of attack and various speed and in most airfoil allow negative and positive angle of attack (which result in lift change).