The Propulsion Subsystem's main goal is to build, design, and test a fully functional prototype of a gas propulsion system. This subsystem has to be fully functional in a vacuum environment. This is important for providing a general direction for the CubeSat and supporting control for about one axis of rotation. The Propulsion Subsystem is beneficial for the Attitude Control Subsystem because the propulsion will keep the CubeSat oriented without lack of control. The propulsion fuel varies from gas to plasma.