Ram air turbine control system

A blade pitch control mechanism for a ram air driven turbine blade mounted for rotation on a hub assembly having a central axis, comprising:

• a governor control member, including a seat, mounted on a portion of the hub assembly for reciprocation along said central axis;
• first biasing means acting on said governor control member in a first axial direction;
• a governor slide member mounted for reciprocation along the central axis;
• said blade having means secured thereto in mating engagement with said governor slide member;
• second biasing means acting between the governor slide member and the seat of the governor control member for biasing the governor slide member opposite said first axial direction to thereby cause the blade to assume a coarse pitch when the blade and hub assembly are in storage and to allow the blade to move to fine pitch during start-up;
• and
• flyweight means supported on the hub assembly and directly engaging the governor control member independently of the governor slide member for acting against the first biasing means to control blade pitch and govern turbine speed after start-up.