Abstract: A method of generating mobility in an internal propulsion apparatus of a closed system utilizing the non-inertial Coriolis force comprises the steps of: locating at least two masses (M1, M2), at both ends of an axis, each of which mass has a radius (r) from the mass center of masses (MCM); generating the Coriolis force at the center of mass 2 (M2) by applying torque (?Tc) to the rotating direction with respect to the rotating center (RCM) of mass 1 (M1), while the radii (r) of the two masses (M1, M2) are varied and the two masses (M1, M2) are rotating at equal velocity with respect to the rotating center (RCM) of mass 1 (M1); the mass 2 (M2) is momentarily stopped in order to become the instant center of mass (ICM) by the Coriolis force, then mass 1 (M1) is rotated to generate a non-initial Coriolis force, after ? seconds, with respect to the mass center of mass (MCM); after the Coriolis force (fc) is generated and a certain period of time has elapsed, a reverse Coriolis force (fc?) is generated in the opposi

Abstract: An internal propulsion apparatus of a closed system utilizing the Coriolis force is provided to generate locomotion without external force.