One of the machines that embody extremely interesting ideas and depart radically from usual practice, not only of their period - 1910 - but of the present time. The Louis Paulhan's machine d'voler, a biplane fitted with a Gnome engine. Its most striking feature was the method employed in the construction of the framework and wings. It had a forward elevator and stabilising tail plane, with the main planes midway between. The angle of incidence of the outer sections, of the main planes could be altered for purposes of lateral control.