The concern was the angles needed to generate the vortexes. The aircraft would have to fly at what would be considered significantly nose-high attitudes, especially on takeoff and landing. They would also need very long landing gear, especially in the nose, in order to keep the wing at a high angle during the takeoff roll. This led to some questions about the handling and control of such a design at low speed. At the first meeting of the Supersonic Transport Committee in 1956, the need for a dedicated low-speed testbed aircraft was decided to be paramount.