Patent ID: 8876474

Claim:
A ram air turbine (RAT) in which a cam follower is operably coupled to turbine blades such that a cam follower position determines turbine blade pitch, the RAT comprising: an axially movable governor shaft having an end axially abutting a nut; a post having threading and a thread relief, the threading engaging with the nut when the post occupies a nut engagement position and the threading disengaging from the nut when the post is moved to a nut disengagement position; and a system operably coupled to the governor shaft and the post whereby, prior to start up, the post selectively occupies the nut engagement position and is manually rotatable in a first direction to move the governor shaft in a first axial direction such that the cam follower is positioned at a first position favorable for start up, and, as RPMs increase from zero due to airstream flow, the post is automatically rotatable in a second direction to move the governor shaft in a second axial direction such that the cam follower is positioned at second positions.