In order to ensure that the domestic large aircraft C9 19 is recognized by the international market, the project adopts a lot of new technologies to ensure that the comprehensive performance of the aircraft C9 19 is at the international leading level and will not be at a disadvantage when competing with Boeing 737 MAX and Airbus A320neo.
The supercritical airfoil reached the international advanced level for the first time: the wing design of C9 19 adopted the supercritical airfoil. Compared with the traditional wing, the supercritical airfoil can improve the aerodynamic efficiency of aircraft cruising by more than 20%, and then improve its cruising speed by nearly100 km/h. If the traditional wing and the supercritical airfoil are designed according to the same thickness standard, the overall drag of the supercritical airfoil is about small 8% higher than that of the traditional wing. Supercritical airfoil can also reduce the structural weight of aircraft and increase the structural space and fuel consumption.
Advanced materials are applied to domestic civil aircraft on a large scale for the first time: C9 19 adopts advanced materials such as aluminum-lithium alloy and composite materials, so as to reduce the weight of the aircraft and prolong its service life. The content of the third generation Al-Li alloy material C9 19 reaches 8.8%, and the content of the advanced composite material reaches 12%.
C9 19 is equipped with advanced airborne systems and engines: C9 19 adopts advanced airborne systems and engines, such as highly modular and integrated avionics system and all-digital fly-by-wire flight control system with envelope protection function. The new LEAP- 1C Gao Han Road adopts the design mode of integrated propulsion system, which is more economical.