Oil_Free_Engine_Technology @SRW (Subsonic Rotary Wing)

Fundamental waves:
~ foil gas bearings have begun to replace traditional oil-lubricated rolling element bearings in small gas turbines
~ the foil bearing technology is ready for consideration for small propulsion gas turbines for rotorcraft
~ significant improvements in thrust/weight ratio and lowered maintenance are primary benefits of enabling oil-free rotorcraft engines
~ improved fundamental understanding of compliant surface foil gas bearing technology is required
~ to develop accurate hydrodynamic fluid film modeling of a non-isothermal case with a fluid, pressure-dependant, moveable boundary
~ thrust load sharing between an oil-free engine and an optimized gearbox
~ high power density electrical machines are needed for core shaft power generation and starting
~ higher power density engines and drive systems
~ predicting foil bearing performance and life
~ modeling technologies to predict bearing power loss, stiffness and damping coefficients and tolerance to misalignment and shaft imbalance
~ the needs for electrical power generation will be determined and coupled with the bearing and rotor activities


catch ~>Subsonic Rotary Wing !