Key highlights

The Dawn Aerospace B20 Thruster is developed to utilize in the NewSpace missions.

Its assembly includes the thruster body, valves, and control electronics. The thruster body is additively manufactured as a single structure using Inconel 718 and includes the injector, combustion chamber, and nozzle. Isolation valves are included upstream of the firing valves for added redundancy.

The health monitoring instrumentation includes an integrated and isolated thermocouple and chamber pressure sensor.

With standard data and power interfaces, thrusters are easy to command and operate. It can also operate under ambient conditions to enable fast turnaround ground testing.

The B20 thruster can be combined with multiple thrusters for high-thrust missions. It can be also paired with Dawn's B1 thruster for torque compensation or 6DOF control through common tanks, interfaces, and control electronics.

Key features

  • Valves
    Normally-closed solenoid
    Four per thruster (firing and isolation)
  • Ignition
    Spark-based igniter
  • Control
    Operable together or independently
    Select your desired quantity
    Pair with B1 thruster
  • Firing modes
    Bi-prop & cold-gas. Switch at will. Managed by not engaging the spark-ignitor
  • Cold-start capable
    Yes. Highly repeatable

Flight heritage

Dawn Aerospace propulsion systems have flown on all SpaceX Transporter missions to date, Starlink rideshare, and Arianespace’s Vega rideshare.

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Last updated: 2024-09-02

B20 Thruster - Green Chemical Propulsion

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Technical specs

dry mass
600 g
length
79 mm
width
80 mm
height
176 mm
thrust range
6.1 to 16.7 N
minimum impulse bit
bi-prop: 1 N s
cold gas: 0.05 N s
propellant type
nitrous oxide (N2O)
propene (C3H6)
pulse frequency
< 4 Hz

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