Abstract: A gas turbine engine includes a compressor powered by a turbine. The turbine includes a nozzle having vanes extending between outer and inner bands. Each vane includes an internal cooling plenum and a bypass tube extending through the bands. First and second manifolds surround the outer band and are disposed in flow communication with the plenums and bypass tubes, respectively. A bleed circuit joins the compressor to the manifolds for providing pressurized air thereto. A control valve modulates airflow to the first manifold and in turn through the cooling plenums of the vanes.

Abstract: A fan blade including a plurality of fiber composite layers and at least one high elongation fiber composite strip joining one of the fiber composite layers at a joint. A method of making a fan blade includes joining a plurality of fiber composite layers and joining at least one high elongation fiber composite strip to one of the plurality of fiber composite layers. An end of the high elongation fiber composite strip meets an end of the fiber composite layer at a joint.

Abstract: A pipeline gauging vehicle has two resilient driving cups arranged to contact the interior surface of the pipeline to create a pressure differential which will propel the vehicle along the pipeline. A plurality of first monitoring arrangements, each consisting of six detecting elements located at circumferentially spaced positions, are axially spaced on a support structure, their orientation being commensurate with a minimum radius of curvature of bends in the pipeline which the vehicle needs to negotiate. A plurality of second monitoring arrangements axially spaced on the support structure have detecting tabs radially spaced from the longitudinal axis of the vehicle by a distance commensurate with a desired minimum radial clearance are arranged to provide an indication when the minimum clearance is exceeded. The vehicle can monitor pipelines having complex three-dimensional geometry involving a succession of bends in different directions.