The Voisin 1915
Triplane had an unorthodox configuration, the tail surfaces being supported between the fuselage and an upper boom attached to the centre section of the upper wing. The four engines were installed in tandem in two
nacelles on the centre wing. Two gun positions were provided, one the nose and second behind the trailing edge of the wings, firing downwards through an aperture in the fuselage. The first aircraft built was powered by four engines but performance was unsatisfactory, and a second aircraft was built, designated E.28, powered by four
Hispano-Suiza engines, and a redesigned circular section fuselage. ==Specifications (Voisin E.28)==