But he did it today.
He said he wants to fly some demonstrations in other places - maybe over the Grand Canyon - and he also wants to do aerobatics.
He said that lots of other pilots should soon be flying similar wings, and that they could put on formation flying displays together.
The wing has no flaps or ailerons. Yves steers using his head. Whichever way he turns his head to look: up, down, left or right; results in him flying in that direction.