Blog
Spline Tooth Count and Load Sharing in Floating Sun GearsA floating sun gear is intended to move slightly within a planetary gearbox so that it can find a balanced position between the surrounding planet gears. This…
Predicting Gearbox Assembly Yield With Monte Carlo SimulationAerospace gearbox programmes live or die by the relationship between nominal design intent and manufactured reality. A gear may meet its drawing dimensions, a…
How Bearing Cage Design Influences Skidding At High Shaft SpeedsIn a geared aircraft engine, the bearing cage may look like a secondary component beside the gears, shafts and raceways. At high rotational speed, however, its…
How Housing Damping Shapes Gearbox Radiated NoiseA geared aircraft engine transfers power through a compact transmission operating at high rotational speed, substantial torque and tightly controlled…
Optimizing Sun Gear Bore Diameter for Weight Savings and Stress ConcentrationIn a geared aircraft engine, a sun gear may appear compact and straightforward, yet its central bore has a strong influence on the performance of the entire…
How Oil Jet Velocity Shapes Cooling in High-Speed Gear MeshesIn a geared aircraft engine, the oil jet has a difficult job. It must cross a fast-moving flow field, reach the loaded tooth flanks, remove heat from the…
Finding the Main Sources of Gearbox Noise with Fractional Factorial DOEGearbox noise is a useful but demanding signal of how an aircraft transmission is behaving. Tonal whine, broadband mesh noise, bearing rumble and intermittent…
Gear Tooth Lead Crowning And Load Distribution Under MisalignmentIn a geared aircraft engine, the ideal contact pattern rarely survives the full operating envelope. Shafts bend under torque, bearings settle, housings…
Optimising Oil Jet Position For Efficient Gear CoolingIn a geared aircraft engine, the oil jet has to do two jobs at once: deliver enough lubricant to the gear mesh and remove heat from the tooth flanks, bearings…
Reading Gear Tooth Prints Across the Load RangeA gear tooth contact pattern is a visible record of how two mating surfaces share force. Engineers apply marking compound to one tooth or gear, rotate the…