Abstract: A gas turbine engine rotor tip clearance and shaft dynamics system and method are provided. The system includes a gas turbine engine that is disposed within an engine case and includes a rotor. A rotor bearing assembly disposed within the engine case rotationally mounts the gas turbine engine rotor. Vibration isolators mounted on the engine case are coupled to the rotor bearing assembly, and are configured to provide linear and independently tunable stiffness and damping. A method includes determining the location of a gas turbine engine rotor rotational axis, disposing the gas turbine engine rotor in an engine case at the rotational axis location, mounting a plurality of vibration isolators that include a plurality of adjustment devices on the engine case, coupling each vibration isolator to the gas turbine engine rotor, and locking the gas turbine engine rotor at the rotational axis location using the plurality of adjustment devices.

Abstract: A gas turbine engine rotor tip clearance and shaft dynamics system and method are provided. The system includes a gas turbine engine that is disposed within an engine case and includes a rotor. A rotor bearing assembly disposed within the engine case rotationally mounts the gas turbine engine rotor. Vibration isolators mounted on the engine case are coupled to the rotor bearing assembly, and are configured to provide linear and independently tunable stiffness and damping. A method includes determining the location of a gas turbine engine rotor rotational axis, disposing the gas turbine engine rotor in an engine case at the rotational axis location, mounting a plurality of vibration isolators that include a plurality of adjustment devices on the engine case, coupling each vibration isolator to the gas turbine engine rotor, and locking the gas turbine engine rotor at the rotational axis location using the plurality of adjustment devices.

Abstract: An axial vane rotary combustion engine includes various performance improving features. These features include fluid film bearings that enable the vane assemblies to react large loads, a dual vane assembly configuration that share vane loads over two cylindrical bearing supports, a vane actuation mechanism that provides positive actuation even with cam surface tolerance variations, and various features to reduce friction to thereby improve efficiency and reduce heat generation.