The invention discloses a navigation aircraft landing gear folding and unfolding system. The navigation aircraft landing gear folding and unfolding system comprises a main folding and unfolding system, a first emergency lay-down system and a second emergency lay-down system, wherein the main folding and unfolding system and the first emergency lay-down system are distributed in a redundant manner; the second emergency lay-down system is mainly a hand pump; an oil outlet joint of the hand pump is connected with a lay-down pipeline of the main folding and unfolding system through a fusiform movable door, an oil return joint of the hand pump is connected to a fold-on pipeline of the main folding and unfolding system through a three-way joint, and then the second emergency lay-down system is distributed in a redundant manner based on the main folding and unfolding system and the first emergency lay-down system. By additionally arranging the second emergency lay-down system which takes the hand pump as a main body based on an existing navigation aircraft landing gear folding and unfolding system, the navigation aircraft landing gear folding and unfolding system is good in economical efficiency, firm in structure, stable to operate and high in reliability, the safety margin of the navigation aircraft landing gear folding and unfolding system is effectively improved, safety loopholes caused due to the folding and the unfolding of a landing gear of an aircraft during flight are substantially and reliably decreased, and the reliability of the navigation aircraft landing gear folding and unfolding system is improved.


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    Title :

    Navigation aircraft landing gear folding and unfolding system


    Contributors:
    FENG SHIRONG (author) / XU SHUNHUA (author) / JIANG DINGWU (author)

    Publication date :

    2015-07-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge




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