| 摘要 |
An aircraft flight control surface actuator that prevents against overtravel is provided with a lock which includes a pin (76) that is urged by spring (b 74) toward the wall (68) that is part of control gear (56) which travels along the axis of a threaded shaft (42) in response to rotation of main shaft (16). An aperture (70) in the wall (68) is aligned with pin (76) only at a neutral position of the flight control surface (12). Lever (80) depresses pin (76) against the force of spring (74) only so long as hydraulic system pressure for the actuator is supplied to cylinder (84).
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