The invention comprises a method for heating a fluid in an engine, including: a rotor rotating relative to a stator about a shaft and a set of vanes extending radially outward, relative to an elongated axis of the shaft, between the rotator and the stator, the set of vanes separating a set of expansion chambers, where the method comprises the steps of: (1) applying a shear force to the fluid to form a gas with a rotatable chamber within the shaft of the engine; and (2) exhausting the gas from the shaft to a rotor-vane chamber, the rotor-vane chamber comprising a void in a vane slot on a shaft side of a first vane, of the set of vanes. Optionally, the gas applies a rotation force by passing the gas from the first vane to a trailing expansion chamber of the set of expansion chambers.

The invention comprises a method for heating a fluid in an engine, including: a rotor rotating relative to a stator about a shaft and a set of vanes extending radially outward, relative to an elongated axis of the shaft, between the rotator and the stator, the set of vanes separating a set of expansion chambers, where the method comprises the steps of: (1) applying a shear force to the fluid to form a gas with a rotatable chamber within the shaft of the engine; and (2) exhausting the gas from the shaft to a rotor-vane chamber, the rotor-vane chamber comprising a void in a vane slot on a shaft side of a first vane, of the set of vanes. Optionally, the gas applies a rotation force by passing the gas from the first vane to a trailing expansion chamber of the set of expansion chambers.