The invention discloses a negative acceleration test flight method for civil transportation aircrafts, which can give consideration to the test flight risk, ensure the safety of a unit and efficiently carry out test flight verification while meeting the related laws and regulations and meeting the navigation safety and reliability of airworthiness evidence obtaining. A parabola flight method is adopted when the aircraft enters and is changed into the negative acceleration state, and the parabola flight method comprises the four stages of an acceleration stage, a jumping stage, an entering keeping stage and a changing stage. In the acceleration stage, the airplane flies flatly and accelerates to the maximum operation speed, in the jump stage, the control lever is rapidly pulled and lifted to enable the airplane to have positive overload and enable the pitch angle at the end of the jump stage to be close to the maximum pitch angle, in the keeping stage, the control lever is pushed downwards to enable the overload to be negative, and meanwhile the push rod amount of the control lever is controlled. The control lever is lifted in the holding stage, so that the average value of the negative overload entering the holding stage is-0.2 g to-0.3 g, and the negative overload duration time is maintained for more than 7s, and in the changing-out stage, the control lever is lifted again, so that the overload becomes a positive value again, and the aircraft is recovered to a stable level flight state.

    一种民用运输类飞机的负加速度试飞方法,能在符合相关法律法规,满足适航取证的航行安全性及可靠性的同时,兼顾试飞风险,保障机组安全且能高效开展试飞验证。飞机进入和改出负加速度状态采用抛物线飞行法,包括增速阶段、跃升阶段、进入保持阶段和改出阶段,共四个阶段。在增速阶段,飞机平飞增速至最大操作速度,在跃升阶段,快速拉抬操纵杆,使飞机具有正过载,并且使跃升阶段结束时的俯仰角接近最大俯仰角,在进入保持阶段,下推操纵杆,使过载变为负值,同时控制操纵杆的推杆量,以使进入保持阶段的负过载的平均值为‑0.2g~‑0.3g,并且维持7s以上的负过载持续时间,在改出阶段,再次拉抬操纵杆,使过载再次变为正值,恢复飞机至稳定平飞状态。


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    Title :

    Negative acceleration test flight method for civil transportation aircraft


    Additional title:

    民用运输类飞机的负加速度试飞方法


    Contributors:
    LUO HAILIN (author) / MA FEI (author) / LIU LISU (author)

    Publication date :

    2024-08-16


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64F GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT , Boden- oder Flugzeugträgerdeckeinrichtungen besonders ausgebildet für die Verwendung in Verbindung mit Luftfahrzeugen / G05D SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES , Systeme zum Steuern oder Regeln nichtelektrischer veränderlicher Größen




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