The Blériot III was radically different from what was to become the orthodox design for aircraft, having two large elliptical closed wing cells in tandem connected by booms.

A single transversely mounted 24 hp (18 kW) Antoinette engine mounted on the lower front wing drove two tractor propellers using flexible drive shafts incorporating reduction gearing to reduce the 1,800 rpm of the engine to 600 rpm.

On 12 November 1906 further attempts at flight were made at the Parc de Bagatelle, but the aircraft hit an obstacle during a ground run and was damaged beyond repair.

To underline this failure, Voisin and Blériot were then to witness Santos-Dumont's successful flight in the 14-bis, made at Bagatelle the same day.

[3] After this failure the partnership between Voisin and Blériot was dissolved, both men preferring to concentrate on their own design ideas.