In order to better grasp the future development direction and innovative development path of transport aircraft and their propulsion systems, the first-principles analysis method was used to analyze the Breguet range equation. The results show that the innovation and development of transport aircraft mainly revolves around three dimensions, including the improvement of aerodynamic performance, the improvement of weight performance and the improvement of propulsion performance. The innovation and development of aircraft technology depends on the progress of aviation science and technology on the one hand, and is affected by the development environment on the other hand. The power is still based on the turbofan engine with large bypass ratio, and the use of new concept engines such as hybrid electric vehicles mainly depends on technological breakthroughs such as batteries.

transport aircraft  /  aeroengine  /  first principles  /  green aviation  /  innovate development paths