| 主权项 |
1. An engine arrangement having:
a first propeller assembly, a first hydraulic actuator for angular displacement of propellers of the first propeller assembly, the first hydraulic actuator rotating with the first propeller assembly, a gear assembly that drives the first propeller assembly, the gear assembly being driven by a power drive shaft that joins to the gear assembly at a first side thereof, the power drive shaft having a longitudinally extending internal cavity, a static conduit which extends along the internal cavity of the power drive shaft, the conduit penetrating the gear assembly such that a portion of the conduit projects from an opposing second side of the gear assembly, and one or more first fluid supply lines for transferring hydraulic fluid between a hydraulic pressure power source located on a static structure of the engine arrangement and the first hydraulic actuator, the first fluid supply lines being routed along the static conduit; wherein a first hydraulic rotating coupling is mounted to the projecting portion of the static conduit, the first fluid supply lines fluidly communicating with the first hydraulic actuator via the first rotating coupling. |
