Pratt-whitney Canada Corp

Ignazio Broccolini

Kian McCaldon

David Waddleton

Cédric Saintignan

Joseph Daniel Maxim Cirtwill

Marc-André Tremblay

Stephen Tarling

Benoit Lachance

Marc-Andre Tremblay

Kian Mccaldon

Methods and systems of operating a gas turbine engine in a low-power condition are provided. In one embodiment, the method includes supplying fuel to the combustor by supplying fuel to the first fuel manifold via a first flow divider valve and supplying fuel to the second fuel manifold via a second flow divider valve. While supplying fuel to the combustor by supplying fuel to the first fuel manifold, the method includes stopping supplying fuel to the second fuel manifold and supplying pressurized gas to the second fuel manifold via the second flow divider valve to flush fuel in the second fuel manifold into the combustor and hinder coking in the second fuel manifold and associated nozzles.

System and method for purging a fuel manifold of a gas turbine engine using a flow divider assembly

The variable pitch propeller control system can have a source of adjustable, actuation hydraulic pressure, a feather valve openable to provide an actuation path of the actuation hydraulic pressure between the source and the actuator, and closeable to connect the actuator to a drain below the actuation hydraulic pressure and close the actuator path, and a bypass path parallel to the actuator path, the bypass path having a restricted flow area relative to a flow area of the actuator path.

Variable pitch propeller control system

A thermal actuator has a bellows construction with a heat-transfer fluid (e.g. oil) located outside the bellows and a thermal expansion material (e.g. wax) located inside the interior volume of the bellows.

Thermal actuator

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Montreal, Canada

Ignazio Broccolini