Subliming Solid Microthrusters

Devices are proposed that would sublime solid propellants to generate small thrusts for maneuvering spacecraft with masses of no more than 15 kg. With solids rather than gases in propellant tanks, there would be no leakage and thus no waste of limited quantities of propellants. There would also be none of the bulk, weight, and cost of plumbing like that needed for handling liquid or gaseous propellants if the propellant tank would be integrated with the subliming solid thruster.