The Wib 313 was designed for the 1930 Service Technique de l'Aéronautique (S.T.Aé, Technical Department of Aeronautics) single-seat fighter (C.1) programme.
The fighter's 520 hp (388 kW) nine cylinder Gnome-Rhône 9Kbrs radial engine was neatly enclosed within a short cowling and drove a variable-pitch propeller, a novelty at the time.
A 7.7 mm (0.303 in) unsynchronised Darne machine gun in a shallow fairing was mounted outboard of each undercarriage leg, firing outside the propeller arc.
[1] The Wib 313 was flown for the first time in late November 1932 at Villacoublay and competitive flight testing continued until September 1933, when it was returned to the factory for modifications.
The fighter had returned to Villacoublay by December but by then a contract had been awarded for the Dewoitine D.500; the Wib 313 was criticized for its poor rate of climb and limited pilot's view.