Arrgh! I don't follow how bleed air is used for sealing as it relates to jet engines.
Does bleed air enterly directly into the oil breather? If so, how is it cooled first (heat exchanger perhaps?).
Is the bearing sealing and oil breather the same thing?
Why do the bearing compartments need to be pressurized?
Does anyone have a pic of an oil breather? Perhaps that would help.
Why didn't I study engineering in school!