The rudder and elevator are mainly in the airflow of the ducted fan. Great when the engine is delivering power, less so when it isn’t. It means that your flight controls will have varying (and not easily predictable) effects based on throttle position.
Add to that a proportionally large side area, which would make it excessively sensitive to crosswinds, and it must have been an absolute pig to land. When you’re low and slow over the runway and you chop the throttle to idle you’ll immediately lose most of your control authority in both pitch and yaw. Any wind gusts at that point and you’ll be in the grass. Dirty side down if you’re lucky.
(, Thu 27 May 2021, 9:22, Reply)
It looks very like most of the control is at the rear rather than balanced with the wings. Steering from the rear doesn't bode well for many vehicles.
(, Thu 27 May 2021, 13:21, Reply)