Abstract: A ram air turbine (RAT) assembly includes a turbine having at least one turbine blade that rotates about a turbine driveshaft, a lower gear box coupled to the driveshaft, a generator/pump housing and a strut connected between the lower gear box and the generator/pump housing. The assembly also includes a damping element connected to one of the strut and the lower gear box. The damping element includes an actuator including an extendable member and a mass element connected to the extendable member and that can be moved by the extendable member from a retracted position to an extended position, wherein the mass element is closer to the actuator when in the retracted position than when in the extended position.

Abstract: A ram air turbine (RAT) assembly includes a turbine having at least one turbine blade that rotates about a turbine driveshaft, a lower gear box coupled to the driveshaft, a generator/pump housing and a strut connected between the lower gear box and the generator/pump housing. The assembly also includes a damping element connected to one of the strut and the lower gear box. The damping element includes an actuator including an extendable member and a mass element connected to the extendable member and that can be moved by the extendable member from a retracted position to an extended position, wherein the mass element is closer to the actuator when in the retracted position than when in the extended position.

Abstract: A blade for a ram air turbine includes a pitch rotation connector configured to connect to a pitch rotation device configured to control rotation of the blade about a pitch axis and an airfoil rotationally fixed to the pitch rotation connector. The pitch rotation connector is positioned on the airfoil to reduce pitch dependent moment about the pitch axis such that a maximum pressure moment about the pitch axis is less than a torque supplied to the blade via the pitch rotation device. The position of the pitch rotation connector can be configured to prevent and/or dampen pitch oscillation due to a changing load on the spring and mass governor.

Abstract: A blade for a ram air turbine includes a pitch rotation connector configured to connect to a pitch rotation device configured to control rotation of the blade about a pitch axis and an airfoil rotationally fixed to the pitch rotation connector. The pitch rotation connector is positioned on the airfoil to reduce pitch dependent moment about the pitch axis such that a maximum pressure moment about the pitch axis is less than a torque supplied to the blade via the pitch rotation device. The position of the pitch rotation connector can be configured to prevent and/or dampen pitch oscillation due to a changing load on the spring and mass governor.