Pratt-whitney Canada Corp

Mario Guerra

James Robert Jarvo

Harris Shafique

Marc Tardif

Brant Duke

Michael R Mark

Kenneth Matheson

Michael Mark

Methods and system are described for operating an aircraft powerplant comprising an engine coupled to a variable-pitch propeller. The method comprises receiving a request to change a propeller rotational speed from a first setting to a second setting, determining a power need for the engine, when the power need corresponds to the second setting, modifying a command for at least one of fuel flow to the engine and oil flow to the propeller to govern the powerplant in accordance with the second setting for the propeller rotational speed, and when the power need does not correspond to the second setting, overriding the request to change the propeller rotational speed from the first setting to the second setting.

Method and system for operating an aircraft powerplant

A system and method for blade angle position feedback. The system comprises an annular member operatively connected to rotate with a propeller, a sensor fixedly mounted adjacent the annular member and configured for detecting a passage of each singularity as the annular member is rotated and axially displaced and for generating a sensor signal accordingly, the annular member and sensor configured for relative axial displacement between a first relative axial position and a second relative axial position respectively corresponding to the first and the second mode of operation, and a detection unit connected to the sensor for receiving the sensor signal therefrom, determining on the basis of the sensor signal a time interval elapsed between the passage of successive singularities, and computing from the time interval blade angle position.

System and method for electronic propeller blade angle position feedback

A turbine blade growth pocket provides a feature to measure blade growth due to engine operation while maintaining dynamic characteristics of the turbine blade within acceptable limits by providing a variable radius fillet between the pocket and a side rail of the pocket.

Method for manufacturing a turbine blade

Dynamically tuned turbine blade growth pocket

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Montreal, Canada

Mario Guerra