| 摘要 |
An actuator comprising a drive arrangement arranged to rotate a first drive member, the first member being in screw-threaded engagement with a second member, the second member being in screw-threaded engagement with a third, output member, wherein the screw-threaded engagement between the first and second members is such that, when the first member rotates at a given speed relative to the second member, the second member moves axially relative to the first member at a first speed, the screw-threaded engagement between the second and third members being such that, when the second member rotates at the said given speed relative to the third member, the third member moves axially relative to the second member at a second, higher speed. The invention also resides in an aircraft engine thrust reverser system utilizing one or more of the above actuators for deploying cowls of the system.
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