Patent ID: 8920119

Claim:
A Ram Air Turbine (RAT), comprising: a turbine hub having an end plate and a nose cone attached thereto at trailing and leading ends, respectively; a governor shaft, to which turbine blades are connected, which is coupled to the end plate and supported within the nose cone to be rotatable with the turbine blades about a central axis thereof and axially movable from a first position relative to the turbine hub to a second position relative to the turbine hub; and a hub assembly operably coupled to the turbine hub, the governor shaft and the turbine blades whereby the hub assembly biases the governor shaft toward: the first position at low rotational speeds such that the turbine blades assume a partial coarse pitch angle of about 30 degrees, and the second position at high rotational speeds such that the turbine blades assume a fine pitch angle, wherein the nose cone comprises a body having an aft facing surface, the body and the aft facing surface defining a forwardly extending recess from the aft facing surface at the central axis in which the governor shaft is supported, and wherein the hub assembly further comprises a shaft spring anchored to the end plate to apply bias to the governor shaft and a plurality of governor springs anchored to a forward spring seat disposed aft of a leading edge of the governor shaft.