Existing gas thrust bearing concepts: (a) fixed geometry taper land/Rayleigh-step bearing, (b) spiral groove bearing, (c) fixed geometry hydrostatic bearing, (d) foil bearing, (e) compliant spiral groove bearing [18], (f) compliant hybrid spiral groove bearing [19,20]. (1) thrust runner, (2) thrust face sector, (3) taper land geometry, (4) Rayleigh step, (5) spiral groove, (6) fixed geometry bearing body, (7) thrust runner rotation, (8) annular hydrostatic pressure groove, (9) orifice restriction, (10) recess/countersink, (11) porous media, (12) hydrostatic feed, (13) bearing housing, (14) lubricating gas film thickness, (15) compliant top foil, (16) fixed leading edge of top foil, (17) free trailing edge of top foil, (18) compliant bump foil/spring, (19) foil bearing body, (20) flexibly mounted thrust face, (21) stationary bearing body, (22) flexible beam, (23) damper material in wire EDM slot, (24) compressor end spiral groove bearing, (25) turbine end spiral groove bearing, (26) flexure fixed outer rim, (27) flexure flexible inner rim, (28) flexures, (29) bearing carrier, (30) cover plate, (31) annular hydrostatic feed annulus, (32) hydrostatic orifice restriction, (33) clamping bolt, (34) moving damper clip, (35) stationary damper clip, and (36) spacer.