Abstract: A fuel injector for a gas turbine engine, the injector comprising a main fuel flow circuit and a pilot fuel flow circuit. The pilot fuel flow circuit comprises at least one convoluted pilot fuel flow passage extending continuously from a pilot fuel feed at an upstream end of the injector to a pilot fuel spray nozzle inlet. The at least one pilot fuel flow passage comprises at least two axially-extending portions extending between the upstream end of the injector towards a downstream end of the injector and joined by an elbow portion proximal the downstream end of the injector. In use, pilot fuel can flow in opposing axial directions within the at least two axially-extending portions, the axially-extending portions being in thermal communication with the main fuel flow circuit.

Abstract: A fuel injector for a gas turbine engine, the injector comprising a main fuel flow circuit and a pilot fuel flow circuit. The pilot fuel flow circuit comprises at least one convoluted pilot fuel flow passage extending continuously from a pilot fuel feed at an upstream end of the injector to a pilot fuel spray nozzle inlet. The at least one pilot fuel flow passage comprises at least two axially-extending portions extending between the upstream end of the injector towards a downstream end of the injector and joined by an elbow portion proximal the downstream end of the injector. In use, pilot fuel can flow in opposing axial directions within the at least two axially-extending portions, the axially-extending portions being in thermal communication with the main fuel flow circuit.

Abstract: Stressed-skin panels are provided having internal open-cell grids molded from material such as fibers, and methods and apparatus for the production thereof are disclosed. The invention utilizes a porous screen having a plurality of elastomeric pads spaced apart thereon. Fiber dispersed in fluid is introduced into the apparatus and over and around the pads. Pressure exerted thereon expels fluid through the screen and consolidates the fibers to form a panel. The pads are designed and constructed in a manner so as to consolidate the fiber mat located below the pads compressed by the pressure, so that the finished panel includes an integrally-molded flange. The height, shape and/or spacing of the pads in the present invention advantageously provide improved mold release and greater resistance to compression set after repeated use. The pads provide greater consistency and improved quality in the flange formation on the panels.