Voisin IVThe Voisin IV was a French two-seat bomber and ground attack aircraft of World War I.DesignThe Voisin IV was a biplane with a single engine in a pusher configuration, developed by Voisin in 1915 with staggered wings. It differed from earlier Voisin combat aircraft designs in having a mounted or cannon.VariantsVoisin LB : Two-seat bomber, ground-attack biplane equipped with a cannon.Voisin LBS : Improved version, with the engine raised compared to the original design.Operators ''Aéronautique Militaire''