PROBLEM TO BE SOLVED: To solve problems in which a sufficient forwarding speed cannot be obtained only by weight transfer or the transfer of a load corresponding to the weight transfer in a helicopter using a fixed pitch coaxial double reversing rotor having no swash plate, and to similarly provide safety in which an excessive speed may not be reached only by the weight transfer or the transfer of the load corresponding to the weight transfer.SOLUTION: In a helicopter using a fixed pitch coaxial double reversing rotor, 1) a wing profile with a moment coefficient of 0 or negative is used; 2) a feathering shaft is provided at the position within 25% of a chord length from a leading edge; 3) a pair of blades opposed across a main mast is integrated, and thereby the increase and decrease of a mounting angle of the unilateral blade has a mechanism in which the mounting angle of the opposed blade increases and decreases in an inverse phase; 4) a mechanism of generating reaction force for generating a returning moment in a neutral position proportional to a feathering angle is provided; and 5) a spring constant of 4) is a value for suppressing a maximum speed to a safe value.SELECTED DRAWING: Figure 9

    【課題】スワッシュプレートを有しない固定ピッチ同軸二重反転ロータを用いたヘリコプタにおいて、体重移動又は体重移動に相当する荷重の移動のみでは十分な前進速度を得られない問題を解決する事、また同様に体重移動又は体重移動に相当する荷重の移動のみでは過大な速度に達しない安全性を付与する事。【解決手段】固定ピッチ同軸二重反転ロータを用いたヘリコプタにおいて、1.モーメント係数が0又は負である翼型を使用する。2.前縁から翼弦長の25%以内の位置にフェザリング軸を設ける。3.メインマストを挟んで対向する一対のブレードを一体とすることで、片側のブレードの取付け角の増減が対向するブレードの取付け角が逆位相で増減する機構とする。4.フェザリング角に比例した中立位置に戻すモーメントを発生する反力を発生する機構を有する。5.4のバネ定数は、最高速度を安全な値に抑える値とする。【選択図】図9


    Access

    Download


    Export, share and cite



    Title :

    HELICOPTER, BLADE AND ROTOR


    Additional title:

    ヘリコプタ、ブレード及びロータ


    Contributors:

    Publication date :

    2017-06-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge



    HELICOPTER ROTOR BLADE

    EREMIN MIKHAIL MIKHAJLOVICH / BORISOV EVGENIJ ALEKSANDROVICH | European Patent Office | 2018

    Free access

    HELICOPTER ROTOR BLADE

    NEKRASOV VLADIMIR IVANOVICH | European Patent Office | 2016

    Free access

    Helicopter rotor blade

    WANG HUILING / CAI MENG / TIAN SHUQUAN et al. | European Patent Office | 2021

    Free access

    HELICOPTER, BLADE, AND ROTOR

    HARADA MASASHI | European Patent Office | 2017

    Free access

    Helicopter Rotor Blade Clamp

    DUNMIRE DANIEL F | European Patent Office | 2015

    Free access