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1908年,美国人利克曼试飞了一种多瓣单向活门翼条式伞形布局直升机。它是通过伞形“圆翼”快速地上下往复运动,让活门交替打开和关闭,以达到向下“压气”产生升力的目的。但这种结构的直升机根本无法离开地面。 1909年,“俄罗斯航空之父”、航空理论的奠基人茹可夫斯基的得意门生尤里耶夫精心设计了一种直升机。它基本拥有近代直升机的大部分结构和部件。该机装有两副旋翼,直径分别是3米和9米。动力是一台52千瓦的格隆牌活塞式发动机。最有意义的是:该机首次采用了由尤里
In 1908, the American Likman flew a multi-flap one-way flap wing-type umbrella layout helicopter. It is through the umbrella “round wings” quickly up and down reciprocating motion, so that the valve alternately open and close, in order to achieve downward “pressure ” the purpose of generating lift. But this structure of the helicopter simply can not leave the ground. In 1909, “the father of Russia’s aviation”, the ruler of Rukovsky, the founder of aviation theory, Yuryv designed a helicopter. It basically owns most of the structures and components of modern helicopters. The aircraft is equipped with two rotors, the diameter is 3 meters and 9 meters. Power is a 52 kilowatts of GeLong brand piston engine. The most significant is: The machine was first used by Yuri