IV: This new machine, also built by Voisin, retained the elliptical tail cell, but the new wing cell was rectangular again and there was a biplane forward elevator cell. This time there were 2-24 hp Antoinette engines driving 2 pusher propellers. The seaplane was tested on 2 long floats on 18 October 1905, but it did not achieve more than 30 kmh, and could not take off. It was then fitted with wheels and retested at Bagatelle on 12 November, but was wrecked when crossing a gutter. Bleriot planned to rebuild it with a single 50 hp Antoinette. This was the last Bleriot type to be built by Voisin.

   (Span (forward wing): 10.5 m; wing area (forward wing): 47 sqm; total wing area: 78.5 sqm; weight: 430 kg; 2-24 hp Antoinettes)