The Voisin IV was a French two-seat bomber and ground attack aircraft of World War I.
Voisin V
…Voisin III: Government (STAé) designation for LA and LAS versions. Voisin IV: Government (STAé) designation for 37 mm (1.457 in) cannon armed variants, with staggered wings. Voisin V: Government (STAé) designation for development…