Abstract: Gas turbine engines systems and methods involving oil flow management are provided. In this regard, a oil pressure analysis system for a gas turbine engine is operative to: receive information corresponding to measured oil pressure and rotational speed during a start up of the engine; correlate the information into data sets, each of the data sets containing a measured oil pressure and a corresponding rotational speed; and determine whether the oil flow valve is functioning properly based on the information contained in the data sets.

Abstract: An assembly includes a debris monitor mount, a motor, and a particle belt. The particle belt carries one or more metallic particles. The particle belt is driven by the motor. The particle belt extends proximate the debris monitor mount when driven by the motor.

Abstract: An assembly includes a debris monitor mount, a motor, and a particle belt. The particle belt carries one or more metallic particles. The particle belt is driven by the motor. The particle belt extends proximate the debris monitor mount when driven by the motor.

Abstract: A tandem fan-turbine rotor assembly for a tip turbine engine includes a hollow fan blade rotor and a solid fan blade rotor. The hollow fan blade rotor includes a first fan blade rotor hub, hollow fan blades, and an inducer. The solid fan blade rotor includes a second fan blade rotor hub, solid fan blades, an exo-ring, and tip turbine blades. The exo-ring connects the solid fan blades at their maximum outward radial extent. The tip turbine blades are connected to the exo-ring and extend radially outward from the exo-ring. The hollow fan blade rotor and the solid fan blade rotor rigidly attach to each other at the first and second fan blade rotor hubs.

Abstract: Gas turbine engines systems and methods involving oil flow management are provided. In this regard, a oil pressure analysis system for a gas turbine engine is operative to: receive information corresponding to measured oil pressure and rotational speed during a start up of the engine; correlate the information into data sets, each of the data sets containing a measured oil pressure and a corresponding rotational speed; and determine whether the oil flow valve is functioning properly based on the information contained in the data sets.

Abstract: A turbine disk has an at least partially radially-extending first portion. An at least partially axially-extending circumferential flange has a root connecting the flange to the first portion. The flange extends to a rim and has a plurality of pairs of first and second weight-mounting fastener apertures. A plurality of first recesses are provided in the rim, each position between an associated first and second aperture of an associated one of the aperture pairs. A plurality of second recesses are provided in the rim each positioned between an adjacent two of the pairs.

Abstract: A turbine disk has an at least partially radially-extending first portion. An at least partially axially-extending circumferential flange has a root connecting the flange to the first portion. The flange extends to a rim and has a plurality of pairs of first and second weight-mounting fastener apertures. A plurality of first recesses are provided in the rim, each position between an associated first and second aperture of an associated one of the aperture pairs. A plurality of second recesses are provided in the rim each positioned between an adjacent two of the pairs.