Comet is a launch-safe and cost-effective electrothermal propulsion system that offers the ideal balance of cost and performance. This high-performance propulsion unit uses water as propellant, making the system easy to work with and easy to fuel. Its highly-flexible interface is easy to integrate into your small satellite, regardless of size and form factor, and easy to operate on orbit. Comet has also been optimized for minimal power consumption and short maneuvering times, allowing you to focus more resources on your payload.

Currently in production, Comet is flight-ready and shipping now.

Great Performance

Comet boasts much of the specific impulse of dangerous mono-propellant systems, but at only a fraction of their typical price. It also offers more thrust with less electrical power than electric propulsion systems, allowing shorter maneuver times. This means your spacecraft can expend its valuable resources on operating the payload rather than the propulsion system.

Robust Operations

Using water as a propellant makes Comet easy to work with. The system is already approved to fly on multiple launch vehicles as part of a secondary or rideshare spacecraft. It was designed for ease of operations, meaning Comet will be easy to use, from the lab to orbit.

Easy Integration

Comet is easy to adapt and integrate to your spacecraft. The tank design is scalable from CubeSats to small micro-satellites, and the electronics have a flexible interface suitable for a wide range of spacecraft.

Comet Advantages:

  • Non-toxic; safe for humans and for launch vehicles.
  • Approved for flight on multiple launch vehicles.
  • More thrust with less electrical power than electric thrusters.
  • Highly-flexible interface suitable for a wide range of spacecraft sizes.
  • Typical schedule is four months from order to delivery.

Comet Specifications

Performance Characteristics  
Typical Specific Impulse 175 s
Warm-Up Time 10 minutes
Power Consumption while Thrusting 55 W for indefinite thrust, 25 W for < 1 minute thrust
Power Consumption while Idle 0.25 W
Nominal Thrust 17 mN
Mechanical / Electrical Characteristics  
Dimensions of Thruster Head 10 x 10 x 3 cm
Dimensions of Propellant Tank Sized for your application
Dimensions of 1,000 Ns Tank 10 x 10 x 17 cm
Input Voltage Range 8 – 34 V
Physical Layer Interface RS422/485, CAN
Protocol and Command Interface NSPv4, customizable