The fourteenth aircraft designed by Louis Breguet was one of the major aircraft of the First World War. Made of metal and canvas, the Breguet 14 was tested in a wind tunnel by the engineer Gustave Eiffel. A bombing and reconnaissance aircraft, it took an active part in the counter-offensive of 1917. The biplane was appreciated by pilots for its robustness and manoeuvrability. The 300 hp Renault engine allowed it to climb rapidly to high altitude and to outrun the German fighters. A total of 8,200 were built. The military Breguet 14 A2 in the Musée de l’Air et de l’Espace (Air and Space Museum) is one of only two originals still in existence in the world.