invention than a complex liquid based propellant system as stated previously the beauty of this system is its simplicity although the primary teaching of this invention is for mems thruster use it can also be applied to sensors communications equipment exposure of experiment platforms and other extraterrestrial uses that require selectable exposure for example for sensors that need to be pointed precisely to have exactly the same view multiple sensors can be installed on a substrate and rotated a module thruster according to the teachings of the present invention can accommodate a variety of mems thrusters the currently preferred embodiment would use a solid fuel however a modular thruster could accommodate other chemical fuels including monopropellant bipropellant and hybrid different types of mems thrusters can coexist within a single device which would allow operators to select between types of thrusters with different configurations propellant and specific impulses depending on the situation the different thruster types could all be manufactured on the same substrate the location of the specific types of thrusters can either be store in a local controller or coded into the substrate itself through magnetic or other means regarding the region of a rolled propellant in contact with an.