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Designing a Compact Oil Sump for High-G Maneuvers in Geared TurbofansA geared turbofan gearbox must transfer substantial power while operating at high rotational speed, elevated temperature, and rapidly changing aircraft…
How oil jet size and pressure control cooling in thin gear rimsThin-rim gears help reduce mass and rotational inertia in geared aircraft engines, but their lightweight geometry creates a demanding thermal problem. A narrow…
Monte Carlo Risk Assessment for Gear Scuffing in Aircraft GearboxesA geared aircraft engine transfers power through a compact gearbox operating under demanding speed, load, temperature, and lubrication conditions. Within that…
How mounting stiffness shapes aircraft gearbox vibrationIn a geared aircraft engine, the gearbox is more than a collection of gears, shafts, bearings, and lubrication circuits. It is also a structural path through…
Nitrided And Carburized Gears For High-Speed Aerospace ApplicationsGeared aircraft engines place demanding requirements on every transmission component. A reduction gearbox must transmit substantial torque while rotating at…
Designing gear tooth flank modification for real operating conditionsA gear tooth flank is shaped under nominal geometry, yet a geared aircraft engine operates far from nominal conditions. Torque changes across the flight…
Bearing Shield Design for Oil Retention Under High-g LoadsIn a geared aircraft engine, bearing shields have a deceptively demanding role. They must retain enough lubricant around rolling contacts during rapid…
Oil Jet Alignment In High-Speed Gearbox CoolingHigh-speed gears in geared aircraft engines depend on a carefully controlled oil supply. The lubricant must reach the mesh in sufficient volume, remove…
Measuring Gear Root Stress In Situ With Strain Gauge TelemetryA gearbox test stand can reveal how an aircraft transmission behaves under torque, speed, lubrication, and thermal load, but the most useful evidence often…
Bearing Seat Tolerances and Preload Consistency in GearboxesIn a geared aircraft engine, bearing preload is established through a chain of dimensions rather than by a single adjustment. Bearing seat diameters, housing…