Swallow type inclined rotation rotorcraft

Abstract

The invention relates to a swallow-type tilt-rotor aircraft, which integrates a helicopter with a fixed-wing aircraft. With external shapes changed, three aircraft types, namely the helicopter, the fixed-wing aircraft and the tilt-rotor aircraft, can be used for flying independently. The aircraft adopts a swallow-type aerodynamic configuration and has a geometrical shape similar to a swallow among flyers. The aircraft is provided with a hydraulic staypole folding wing; an outer segment wing and a middle segment wing are in hinged connection and can be folded downwards and stretched upwards; a coaxial tilt-rotor system is arranged on a wing beam structure of the middle segment wing, forming a horizontal-type double-rotor configuration; two pairs of rotors can rotate to and fro between a vertical position and a horizontal position; when the rotors are positioned in the vertical position and the outer segment wing is folded downwards, the aircraft is a helicopter; when the rotors are positioned in the horizontal position and the outer segment wing is stretched upwards, the aircraft becomes a fixed-wing aircraft. The aircraft is provided with a combined-type engine system consisting of a plurality of engines and a common axis, thereby having reliable safety performance. The aircraft is simple in structure, good in performance and wide in practical range.

Description

Technical field [0001] The invention relates to a Yan type tilt rotor aircraft. Background technique [0002] Among the existing tilt-rotor aircraft, the American V-22 "Osprey" tilt-rotor aircraft is an example with relatively mature technology. Accompanying drawing 26 is V-22 " Osprey " tilt rotor aircraft three side view and power, transmission system structural diagram (published on " aviation knowledge " 2001 10 period). Below with reference to accompanying drawing, comment on this existing tilt rotor aircraft. [0003] The overall layout of the V-22 "Osprey" tilt-rotor aircraft is: at the wing tips similar to fixed-wing aircraft, a pair of engine nacelles with rotors are respectively installed. The rotor and nacelle can be rotated back and forth between horizontal and vertical positions. When the rotor is in a vertical position, the tiltrotor is equivalent to a horizontal twin-rotor helicopter; when the rotor is tilted forward to a horizontal position, the tiltrotor ...

AI Technical Summary

Problems solved by technology

But above-mentioned this existing tilt rotor aircraft still has the following deficiencies technically: the one, the engine nacelle rotor structure is heavy and complicated, and the manipulation difficulty is extremely great; It is difficult to completely equal the output power, especially in the process of vertical take-off and landing. A slight failure of one of the engines will cause the body to lose balance and cause serious consequences; the third is that the aerodynamic layout is not ideal. Straight wings are not conducive to improving lateral stability, and the aspect ratio and root-to-shoot ratio are small, which is not conducive to improving lift-to-drag ratio and improving maneuverability

Although this existing tiltrotor can fly like a fixed-wing aircraft, its lift efficiency is low and its stability is poor. Large restrictions, generally can only be used as a means of transportation such as transport aircraft

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