A foil thrust bearing forms the primary rotating interface for a film
riding face seal. This face seal includes a spring system that will allow
the entire assembly to translate axially relative to a static attachment.
The complete assembly will form a hybrid foil/film riding face seal that
shows much promise at being sufficiently flexible to enable operation in
a gas turbine engine. The seal includes a flexible top plate having a
non-flat surface under its working conditions, and a spring support
system to allow the top plate to accommodate axial excursions and
out-of-flat distortions.