PROBLEM TO BE SOLVED: To provide a coaxial dual reversal type helicopter of a stationery pitch type which can reduce vibration and noise.SOLUTION: A coaxial dual reversal type helicopter 1 of a stationery pitch type includes an upper stage rotor 7 and a lower stage rotor 8 which rotate around a common central axis of rotation 6 in opposite directions, in which the upper stage rotor 7 includes: an upper stage inner ring 71 and an upper stage outer ring 72 centered on the central axis of rotation 6; plural upper stage rotor blades 73 which are radially bridged around the central axis of rotation 6 and between the upper stage inner ring 71 and the upper stage outer ring 72; and an upper stage connection member 74 which connects the upper stage inner ring 71 to an upper stage rotor shaft 70 centered on the central axis of rotation 6. A lower stage rotor 8 also has a similar structure. Generation of a blade end flow by the upper stage rotor 7 can be suppressed, and a helicopter having reduced vibration and noise can be realized.

    【課題】振動、騒音を低減可能な固定ピッチ式の同軸2重反転型ヘリコプタを提供すること。【解決手段】上段ローター7、下段ローター8が共通の回転中心軸線6を中心として逆回転する固定ピッチ式の同軸2重反転型ヘリコプタ1において、上段ローター7は、回転中心軸線6を中心とする上段内リング71、上段外リング72と、上段内リング71および上段外リング72の間に、回転中心軸線6を中心として放射状に架け渡された複数枚の上段ローターブレード73と、回転中心軸線6を中心軸線とする上段ローターシャフト70に上段内リング71を連結している上段連結部材74とを備えている。下段ローター8も同一構造である。上段ローター7による翼端流の発生を抑制でき、振動、騒音の少ないヘリコプタを実現できる。【選択図】図1


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    Title :

    COAXIAL DUAL REVERSAL TYPE HELICOPTER OF STATIONERY PITCH TYPE


    Additional title:

    固定ピッチ式の同軸2重反転型ヘリコプタ


    Contributors:

    Publication date :

    2015-10-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge



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