Combined coaxial unmanned helicopter

Abstract

The invention discloses a combined coaxial unmanned helicopter. The combined coaxial unmanned helicopter is provided with a helicopter shell, a helicopter body supporting structure, an engine, an oil tank, a helicopter main rotor, a helicopter main speed reducer, wings and a tail wing and further comprises a power distribution and clutch system and a propelling propeller. The propelling propeller is mounted on the rear portion of a helicopter body. The combined coaxial unmanned helicopter can fly at different flight stages according to different flight speeds, power of the engine is distributed to the main rotor and the propelling propeller through the power distribution and clutch system, and vertical take-off and landing, hovering, low-speed forward flying, medium-speed flying and high-speed flying are achieved. The combined coaxial unmanned helicopter has the advantages that compared with a conventional helicopter, the flying speed can be remarkably increased; one set of engine is used for supplying power to two sets of flying systems, and the weight is low; the two coaxial rotor wings are adopted, airflow is symmetrical, the pneumatic effect is good, the structure is compact, the size is small, the self-rotation mode is achieved at the high speed, and resistance force is smaller.

Description

technical field [0001] The invention relates to the field of aviation technology, in particular, it is a novel composite coaxial unmanned helicopter. technical background [0002] Helicopters can take off vertically and hover in the air, but conventional helicopters have disadvantages such as low speed and short flight time. After research at home and abroad, theoretical analysis and practical accumulation have proved that the combination of helicopters and other power and lift systems, that is, compound helicopters, can effectively increase the flight speed of the helicopter, and then increase its range and endurance. [0003] At present, the compound helicopters used at home and abroad have various forms: [0004] Form 1: Coaxial helicopter combined with propulsion device, such as figure 1 shown. For example, the new generation of high-speed attack aircraft X2 of Sikorsky Corporation of the United States, the lift device adopts coaxial double rotors, and the propulsion ...

AI Technical Summary

Problems solved by technology

[0006] For Form 1, the advanced coaxial rigid rotor technology it adopts has high requirements on the design and manufacturing process of the rotor, making it difficult to manufacture and the cost is too high

[0007] For form 2, the structure is complex and the weight of the body is relatively large; the control system is complex and the stability is poor; the vibration problem is serious and the requirements for manufacturing materials are high

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