This paper deals with a 1-N class liquid propellant thruster using SHP163 monopropellant and arc discharge assisted combustion. SHP163 is a hydroxyl-ammonium nitrate (HAN)-based monopropellant, which has relatively low toxicity and reactivity to materials such as metal and polymers, and can be stored in a liquid form due to its relatively low freezing point. Arc discharge, supporting a SHP163 exothermic chemical reaction, is used as an alternative to conventional particulate catalysts. Part of the pressurant is used as working fluid for the arcjet. Thrust measurement in the atmospheric pressure showed that the prototyped thruster yielded a thrust of 0.47 N and a specific impulse of 62 s at a discharge power of 0.98 kW.
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