Scorpius

Composite propellant tanks for in-space propulsion

Scorpius tanks work with chemical and electric propulsion. They fly on spacecraft that must carry propellant and equipment through a wide temperature range.

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Built for spacecraft

  • Type-V propellant tanks have fewer failure modes than traditional approaches.
  • Stringers with integral shelves replace struts, straps, braces, clamps and brackets.
  • You attach payloads and bus subsystems to the tank.
  • Thermal expansion stays very low from cryogenic temperatures to 175 F.

Propellant expulsion

Scorpius sells Pressurmaxx® vessels with a bladder positive expulsion device for spacecraft in-space propulsion.

Flown on lunar landers

  • IM-1: Scorpius Type-V tanks stored liquid oxygen and liquid methane propellant for the Intuitive Machines Nova-C lander, which landed on February 22, 2024.
  • IM-2: two Scorpius Pressurmaxx® all-composite cryogenic Type-V tanks began the trip to the Moon on February 26, 2025, aboard the Intuitive Machines NOVA-C lander.

Pressurization

The tridyne pressurization system can save about 50% of the mass of the pressurant gas and tank.

See the flight record for the Intuitive Machines missions.

Capabilities for this work

Composite Type-V pressure vessels

All-composite, linerless, unibody pressure vessels built with Hexcel carbon fiber and Sapphire 77 cryogenic resin. A vessel can serve as the primary structure of a launch vehicle or spacecraft.

Tridyne pressurization system

A high-performance pressurization system that adds small amounts of hydrogen and oxygen to helium. It saves about 50% of the mass of the pressurant gas and the pressurant tank.

Talk to an engineer

Tell us what you are building, the propellant and the pressure range.

Book an engineering consultation