The Deltaviex, its name derived from the Delta VX design of Alliet at ONERA and built by SNCASO at Courbevoie, was intended to explore lateral control by blown flaps instead of ailerons.

[1][3] Yaw was similarly controlled by passing more of the compressor bleed out though fine holes in the tall fin, which was swept on both edges and straight tapered to a squared-off tip; there was no rudder.

It was round in cross section, with a pointed nose and air intakes on is upper flanks over the wings for the low power (3.92 kN (880 lbf)) Marboré engine which exhausted through a tail pipe.

Details of the development are sparse but photographs from the later stages show the revised cockpit and also the addition of a rectangular ventral fin in place of a tail bumper wheel used in the early tests.

[1][3] After these final tests the airframe was acquired as a feature by a local garage then retrieved in 1984 by members of the historic aircraft preservation group Ailes Anciennes Toulouse who have gradually restored it.