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Robustifying Aircraft Gearbox Design with Taguchi ExperimentsGeared aircraft engines live at the uncomfortable intersection of high rotational speed, tight mass budgets and unforgiving certification regimes. Every micron…
Gear tooth flank modification and the dynamics of mesh excitationGeared turbofan engines demand gearboxes that operate reliably at rotational speeds well beyond those found in conventional industrial drives. Within these…
Choosing the right planet count for aircraft gearbox power densityIn a geared aircraft engine, the planetary gearbox must transmit enormous torque through a compact, lightweight assembly. The number of planet gears affects…
Oil Scavenge Diameter Effects on Aeration and Pump Demand at High-GIn modern geared turbofan engines, the oil scavenge circuit works quietly in the background, returning lubricant from bearings, gears, and seals back to the…
Lightweight CFRP Gearbox Housings Cut Weight and Vibration TransmissionFor decades, designers of geared aircraft engines have chased the same two prizes: lighter drivetrains and quieter cabins. Carbon fibre reinforced polymer…
How gear face width reshapes helix angle correction under loadHelical gears carry torque across their flanks with a smoothly inclined contact line, and the angle of that line — the helix angle — defines how the load is…
Regression of gearbox efficiency on oil temperature and viscosityThe relationship between lubricant conditions and mechanical efficiency has long sat at the heart of geared engine development. Within high-speed aerospace…
Planet Pin Diameter And Gearbox EfficiencyIn a geared aircraft engine, the planet pin carries a demanding combination of forces. It supports the planet gear, transfers torque through the epicyclic…
How Case Carburizing Depth Variation Changes Tooth Fatigue ScatterFor a geared aircraft engine, tooth bending fatigue is governed by more than nominal geometry and rated torque. The case-hardening profile creates a…
Dry Sump Lubrication For Efficient Aero GearboxesDesigning a dry sump lubrication system for reduced oil volume in aero gearboxes requires more than removing oil from a conventional housing. The system must…