为何沈飞六代机代表世界航空最高集成水平（2）全动翼尖

As a high-speed, highly maneuverable, omnidirectional stealth air superiority fighter, China's Shenyang Aircraft Corporation's sixth-generation aircraft not only uses variable geometric strips that are not visually recognizable, but also obviously uses the subversive design of all-moving wingtips in manned fighters for the first time in the world. It is a cutting-edge technology that integrates aerodynamic optimization, stealth control, and intelligent materials, aiming to completely change the control method of traditional wings.

We know that to expand the flight envelope and enhance omnidirectional stealth, the sixth-generation aircraft generally cancels the horizontal and vertical tails. These two account for more than 15% of the aircraft's structural weight, and their air resistance accounts for 30% of the aircraft's air resistance. At the same time, technologies such as vortex lift enhancement, distributed control surfaces, active jets and vector thrust based on double delta wings or large-strip lambda wings are adopted. However, when a tailless aircraft is performing maneuvering flight, the aerodynamic force and torque show significant nonlinear characteristics, the three-axis force and torque are seriously coupled, and it faces insufficient yaw control, poor rolling stability, and the risk of stalling at a large angle of attack. To ensure the aircraft's controllability in the entire flight envelope and achieve satisfactory flight quality, it is necessary not only to make up for the stability after losing the horizontal tail and vertical tail, but also to obtain higher maneuverability and agility. Traditional aerodynamic control surfaces have no potential to be tapped, and finding a suitable control surface configuration is one of the core challenges of the sixth-generation aircraft. To this end, the Chengdu Aircraft Corporation's sixth-generation aircraft uses an innovative split-type drag rudder that is completely different from the B2 and B21 stealth bombers, the Shenyang Aircraft Corporation's sixth-generation aircraft uses a subversive all-moving wingtip, and the US F47 has regained the canard wing. It is unknown whether it has adopted other innovative control surfaces.