Thrust bearing system with inverted non-contacting dynamic seals for gas turbine engine

A gas turbine engine comprising:

• a spool defining an axis and including a thrust bearing supporting a hub and a compressor mechanically coupled to a turbine by said hub;
• a first non-contacting dynamic seal including a first body attached to a first floating shoe configured to seal first rotatable inner surfaces of said spool to define a first flow cavity, the first floating shoe radially inward of said first rotatable inner surfaces with respect to said axis;
• a second non-contacting dynamic seal including a second body attached to a second floating shoe configured to seal second rotatable inner surfaces of said spool to define a second flow cavity, the second floating shoe radially inward of said second rotatable inner surfaces with respect to said axis;
• and
• a third non-contacting dynamic seal including a third body attached to a third floating shoe configured to seal rotatable outer surfaces of said hub and is positioned in an axial direction relative to said axis between said first and second floating shoes to define said first flow cavity and said second flow cavity, the third floating shoe radially outward of said rotatable outer surfaces with respect to said axis;
• and
• wherein each of said first non-contacting dynamic seal, said second non-contacting dynamic seal and said third non-contacting dynamic seal is a hydrostatic seal.