An aircraft with combined wing structure

Abstract

The invention belongs to an overall aerodynamic configuration form of an aircraft, belongs to the field of the advanced overall aerodynamic configuration of the aircraft and especially relates to theaircraft with a combined type jointed wing structure. The aircraft comprises a fuselage main body, a front wing, a propelling system and a rear wing; the propelling system comprises a nacelle on wingand a nacelle bracket; the rear wing comprises a M-shaped lifting wing and a V-shaped tail wing; the M-shaped lifting wing has the posture stabilizing and posture control functions; the V-shaped tailwing has a posture stabilizer and an operation plane. The invention has the beneficial effects that the technical scheme is adopted so that the aircraft has simple structure and reasonable configuration and is beneficial to the promotion of lift-drag ratio, cruising performance, aerodynamic efficiency and stability of the aircraft.

Description

technical field [0001] The invention belongs to a new overall aerodynamic layout form of an aircraft, belongs to the field of advanced overall aerodynamic layout of an aircraft, and in particular relates to an aircraft with a combined connecting wing structure. Background technique [0002] For aircraft with a large aspect ratio, it is structurally more reasonable to use the unconventional layout of the joint wing to provide additional support for the wing, but most unconventional joint wing layouts require the lifting surface to participate in the longitudinal attitude control of the aircraft. This is completely different from the characteristic that the empennage does not participate in the lift contribution in the conventional layout form of the aircraft. While it brings efficiency improvements, it also brings some other problems. [0003] Take the "Rutan Flyer" as an example: [0004] 1. Aircraft with unconventional overall aerodynamic layout (such as joint wings or ca...

AI Technical Summary

Problems solved by technology

[0004] 1. Aircraft with unconventional overall aerodynamic layout (such as joint wings or canards) generally have poor static stability, and small aerodynamic disturbances may cause drastic changes in the pitch attitude of the aircraft. Modern aircraft with relaxed static stability generally have It has an active control system with longitudinal damping and stabilization, but such a control system has extremely high reliability requirements, which correspondingly brings high research and development difficulties and expensive costs. The "Lutan Flyer" is mainly through the manual intervention of the pilot To stabilize the attitude, and this method will undoubtedly greatly increase the workload of the pilot

[0005] 2. Wings with a large aspect ratio generally have a large span, and in many cases the span can even far exceed the length of the fuselage. This will form a short directional control arm, which will stabilize the directional and control the aircraft. The layout of the surface brings difficulties, and this problem will be encountered in both conventional and unconventional layouts. In order to obtain sufficient directional stability, a set of vertical tail fins are installed on the two tail booms of the "Lutan Flyer". , and the length of the tail boom was lengthened to lengthen the directional control arm, which led to the very small angle of attack available for takeoff and landing of the aircraft, so that it almost ran out of the runway when it took off with a full load and caused an accident

Unconventional layout Due to the mutual coupling of lift and attitude control, it is difficult to carry out the loading and trimming of the aircraft in this way, which will inevitably lead to a stricter restriction on the range of its available center of gravity

Images