| 摘要 |
A Ram Air Turbine (RAT) 10 is provided and includes: a turbine hub 11 having an end plate 12 and a nose cone 13 attached thereto at trailing and leading ends, respectively; a governor shaft 20, to which turbine blades 21 are connected, which is coupled to the end plate 12 and supported within the nose cone 13 to be rotatable with the turbine blades 21 about a central axis thereof and axially movable from a first position relative to the turbine hub 11 to a second position relative to the turbine hub 11; and a hub assembly 30 operably coupled to the turbine hub 11, the governor shaft 20 and the turbine blades 21 whereby the hub assembly 30 biases the governor shaft 20 toward the first position at low rotational speeds such that the turbine blades 21 assume a partial coarse pitch angle, and the second position at high rotational speeds such that the turbine blades 21 assume a fine pitch angle.
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