Aircraft with wing sweepback angle change

Abstract

An airplane able to change the backswept of its wing is disclosed. The wing is linked to airplane body via pin axle. Two shape memory alloy bars are symmetrically fixed to airplane body along it axis and behind said pin axles. The both ends of said shape memory alloy bars are respectively linked with one end of relative connection rod, whose another end is pivoted with a slide block able to slide in a slot on wing. The external surface of wing is sealed by shape memory polymer layer.

Description

technical field The invention relates to an aircraft. Background technique Wings are the main components of an aircraft that are reconfigurable in flight. Purposefully changing the shape of the wing in flight (such as wing sweep angle, wingspan and airfoil, etc.) can effectively increase the flight performance of the wing. Among them, the effect of changing the wingspan and wing area is the most prominent. For example, when an aircraft is cruising, it usually requires the wing to have a high aspect ratio, a large wing area and a small sweep angle, and to fly at high speed, it requires a low aspect ratio, a small wing area and a large rear Grazing angle. During the flight of the aircraft, when the airflow velocity perpendicular to the leading edge of the wing is close to the speed of sound, the local airflow velocity on the upper surface of the wing will exceed the speed of sound, and shock waves will appear, which will increase the flight resistance sharply. Because the...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to provide a kind of aircraft that can change the wing sweep angle, it can solve the problem that existing variable-sweep wing aircraft has complex wing rotation mechanism, heavy weight, high development cost, difficult operation and low flight performance. The problem

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