The invention belongs to the technical field of
airplane design, and relates to a self-adaptive adjustable low-resistance fairing, which comprises a fairing head part, a fairing back part, a plane
body surface, a through hole, a coiled spring, a fixed sliding rail, a front end plate and a back sliding end plate. According to the invention, the conventional fairing is segmented, a set of simple flexible mechanism is added in a superposition form in the fairing, and the slenderness ratio of the fairing can be automatically changed according to the front and
back pressure difference of the fairing, so that a
wetted area is small and frictional drag is small when an
airplane flies at a
low speed, the slenderness ratio is suitable and the pressure drag is small when the
airplane flies at a high speed, and the drag characteristics of the airplane at each flying speed are improved. The self-adaptive adjustable low-resistance fairing disclosed by the invention can be balanced between the pressure drag and frictional drag, the shape of the fairing can be self-adaptively changed according to the flying speed, flow separation on the fairing under a high-speed condition is restrained, and the vortex intensity at the
tail part of the fairing is improved, so that the
differential pressure between the front and the back of the fairing is reduced and the airplane flight resistance is reduced.