The landing gear bogie pitch trimmer 100 has a hydraulic actuator 102 with a flow control valve 120 used to control fluid flow from an aircraft hydraulic system 200 external to the pitch trimmer through a fluid interface 110. A gas chargeable accumulator (fig.2,330) may be connected to the valve to deliver hydraulic fluid to the actuator. A non-return valve (fig.2,326) may restrict fluid from the accumulator towards the interface. The pitch trimmer may be configured so that in a first valve position a first actuator side 104 is connected to the interface, and in a second position the first actuator side is connected to a second actuator side 106. The pitch trimmer may have a second fluid interface 112 to permit outflow from the actuator, with a second non-return valve 128 to prevent or restrict backflow towards the actuator; alternatively a single fluid interface may operate in both directions (fig.2,110). The pitch trimmer may form part of an aircraft system 1, the system having a hydraulic landing gear extension and retraction system with a hydraulic fluid supply line 202 connected to the fluid interface; and a landing gear controller 220 to control the valve.
Landing gear bogie pitch trimmer
2018-11-28
Patent
Electronic Resource
English
IPC: | B64C AEROPLANES , Flugzeuge |