The original tail for the Beta Technologies Ava XC, which was replaced with a T-Tail for aerodynamic control in flight. The large hole in the tailboom is where the aft outriggers would rotate the propellers from horizontal to vertical thrust. This was part of the Beta display at the EAA AirVenture 2019, Oshkosh, Wisconsin. See Vertiflite Sept/Oct 2019 for more details on AirVenture 2019. (VFS staff photo July 21, 2019. CC-BY-SA 4.0)
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