WaterCube+

WaterCube+ is the next-generation, higher-performance version of our water-based propulsion. It is a dual-mode system that combines chemical propulsion and resistojet propulsion in a single unit, with water as the only propellant.

Both modes run from the same propellant, so operators can choose the mode that best suits each manoeuvre without carrying two separate systems. This extends the range of missions water propulsion can serve, including larger SmallSats and more demanding manoeuvres such as orbit raising, constellation deployment and end-of-life disposal.

WaterCube+ keeps everything that makes WaterCube safe and easy to work with. The propellant is non-toxic and stored at low pressure, ground handling and testing are simple, and the supply chain is fully European. The system builds on the same metal additive manufacturing and proprietary heat-exchanger technology, and customers can model it in OrbitRev, our propulsion digital twin, during mission design.

WaterCube+ is being developed under an ESA Technology Development Element contract, with Capsule Space as prime contractor working alongside Politecnico di Milano and industrial partners. The system is currently at TRL 4+, and market launch is planned for Q2 2028.

We are looking for early adopters and mission partners to help shape WaterCube+ requirements ahead of qualification.

More information: https://www.capsule-space.com/