The B20 from Dawn Aerospace is a Cold Gas thruster that has a thrust of 6.6-19.3 N. It has a dry mass of 610 gms and a specific impulse of 285 s. It has a valve pressure of 0.8-12 W and requires a DC supply of 12-28 V. This spacecraft thruster supports standard data and power interfaces, such as RS-485/RS-422, solenoid, and dual-seat valves (four valves per thruster). It is easy to command and is operable under ambient conditions to enable fast turnaround ground testing.
The thruster body is manufactured as a single structure using Inconel 718 and consists of an injector, combustion chamber, and nozzle. Isolation valves are included upstream of the firing valves for added redundancy. This ITAR-free REACH-compliant thruster consists of a health monitoring instrumentation system that includes an integrated and isolated thermocouple and chamber pressure sensor. It utilizes green propellants like nitrous oxide (N2O) and propene (C3H6). This cold gas thruster measures 167 x 80 x 68 mm.
