As I said, the Wright's did not use the catapult in 1903. Three years before Dumont's 1906 flight of 60 metres, they flew well over 250 meters without catapult

As I said, the Wright's did not use the catapult in 1903. Three years before Dumont's 1906 flight of 60 metres, they flew well over 250 meters without catapult assist at takeoff. In 1904 they also flew over 400 meters without catapult assist. After that flight they started using a weight-powered catapult to simplify takeoffs and speed development. So yes, it is simple. The Wrights flew without "shooting it out of a device" years before Dumont. The Wright Flyer was also capable of lateral control, like a modern, independent airplane.