Mmmm... Debatable. The knowledge of what was needed was already known through observation of birds for a long time. How to engineer the structure into a stable and controllable form had also been worked out on gliders before they had the engine ready, and the engine most certainly was not a discovery, but rather a refinement. I don't take anything away from them and what they did and contributed to the advancement in how to do the research to make the learning process so much more efficient. That was the Wright's biggest contribution to the game, their methodical wind tunnel testing and analysis especially on props. However the fight over the aileron was not a correct fight, and by choosing to fight it, it cost them dearly. There was plenty of opportunity for everyone, and they wanted to get greedy. The aileron was a significant difference, and improvement, in design.