Axially spaced apart counter-rotatable forward and aft rows (21, 23) of forward and aft propellers (22, 24) mounted on forward and aft rotatable frames (52, 54) includes a flowpath (80) passing through the forward and aft rotatable frames (52, 54). Hydraulic rotary forward and aft pitch change actuators (86, 88) mounted on the aft rotatable frames (52, 54) are connected to and operable for controlling and setting pitch of the aft propellers (22, 24). The pitch change actuators (86, 88) are mounted radially inwardly of the flowpath (80) in a one to one ratio with forward and aft rotatable struts (82, 84) extending radially across the flowpath (80). One or more rotatable shafts (92, 94) extend through one or more of the rotatable struts (82, 84) and connect one or more of the pitch change actuators (86, 88) to one or more of the propellers (22, 24). The pitch change actuators (86, 88) may be ganged together by unison rings (600, 610) having ring teeth (602) engaging gear teeth (604) on gears (606, 616) connected to the pitch change actuators (86, 88) or connected to the rotatable shafts (92, 94).


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    Titel :

    Pitch change apparatus for counter-rotating propellers


    Weitere Titelangaben:

    Blattverstellungssvorrichtung für gegenläufige Propeller
    Appareil de changement de pas pour hélices contre-rotatives



    Erscheinungsdatum :

    13.07.2016


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    B64C AEROPLANES , Flugzeuge / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT



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