The Brazilian pioneer was the first to demonstrate that controlled flight was possible thanks to his dirigible balloons. He flew his « Number 6 » round the Eiffel Tower as early as 1901. He designed and flew the 14-bis « Oiseau de proie » (Bird of prey) in 1906. This invention was the first fixed-wing flying machine witnessed by the European press and French aviation authorities to achieve an actual controlled flight.
He designed and flew the Demoiselle (Damselfly) in 1908. This aircraft was controlled by wing warping, and a tail unit equipped with a rudder, and an elevator.