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低速飞行特性是直升机飞行品质的研究重点之一,低速飞行试验是开展直升机低速飞行特性研究重要手段。首先,从直升机低速飞行特性的主要影响因素和直升机低速飞行的配平操纵两个方面进行理论分析;然后,通过直升机低速前后飞行及侧飞时配平飞行试验,对直升机低速飞行时的配平操纵特性和试验直升机低速特性与尾部气动布局的影响进行分析,提出减小平尾面积或降低初始安装角的尾部气动优化建议,直接指导该型直升机设计和更改。
Low-speed flight characteristics is one of the focuses of helicopter flight quality research, low-speed flight test is an important means to carry out low-speed helicopter flight characteristics research. First of all, the paper analyzes the main factors affecting the helicopter’s low-speed flight characteristics and the trim operation of the helicopter’s low-speed flight. Then, through the helicopter low-speed front-to-back flight and side flight time flight test, The experimental helicopter low speed characteristics and the rear aerodynamic layout are analyzed. Proposed aerodynamic optimization proposals to reduce the tail area or reduce the initial installation angle, and direct the helicopter design and modification.