evansb is right
SNCASO ONERA Deltaviex (VX)
strange plane, my French isn't perfect but from what I could understand it had a high-sweep wing (but not a delta, despite the name), blown flaps and no directional controls, or, to be more precise, directional control was obtained by some kind of air blowing (unsure if directional nozzles or some sort of Coanda effect)...
Now at Ailes Anciennes Toulouse (
Ailes Anciennes Toulouse - Découvrez notre Collection).
evansb has control