Overview
Our solutions include “bolt on” propulsion modules as well as application-specific spacecraft capable of semi-autonomously performing entire missions.
Rapid Orbital Mobility Bus
- Parabilis’ Rapid Orbital Mobility Bus (ROMBUS) family of propulsion modules provide high-impulse thrust for satellite translational maneuvers, and can be used for initial orbit insertion, rapid orbit rephasing, threat/collision avoidance, and targeted re-entry at the satellite’s mission end of life. The low-cost ROMBUS design consists of a safe, green hybrid propulsion system utilizing rubber (HTPB) or acrylic (PMMA) for fuel, and nitrous oxide (N2O) or hydrogen peroxide (H2O2) as an oxidizer. The baseline configuration is a single, centrally located motor nested within the oxidizer tanks. The highly maneuverable configuration features four or more hybrid motors with a centralized oxidizer tank. Configurations can be augmented with a gimballed nozzle for thrust vector control, and/or RCS thrusters for low-thrust maneuvers and attitude control to augment reaction wheels or to dump momentum from reaction wheels.
Dense Orbital Transfer System (DOTS)
The Parabilis Dense Orbital Transfer System (DOTS) is a fully integrated CubeSat-scale family of modular propulsion systems. It leverages Parabilis’ solid-liquid hybrid engine technology, combining a plastic-based fuel with a hydrogen peroxide oxidizer. The DOTS engine accelerates CubeSats significantly, boosting Delta-V to hundreds of meters per second (over 1,000 mph) in just a few minutes, providing small satellites with the essential speed to maneuver decisively, evade threats, and execute dynamic repositioning swiftly. The safe, non-toxic fuel and oxidizer combination simplifies handling and integration for CubeSat providers and operators, accelerating deployment. Parabilis has successfully performed multiple hot-fire tests of the fully integrated DOTS system, and every major component was individually tested and characterized. DOTS is expandable in size, enabling high thrust across the full CubeSat class of vehicles, payloads and missions.
Hybrid Orbital Transfer Systems (HOTS)
The Parabilis Hybrid Orbital Transfer Systems (HOTS) family of propulsion modules deliver high-thrust hybrid propulsion for SmallSat mobility. It is designed for spacecraft in the 100–500 kg class with a target thrust range of 50–250 lb.
The system provides delta-v capability for rapid orbit adjustments, phasing, collision avoidance, and other maneuvering needs typical of small satellites, while retaining the non-toxic, storable hybrid propellant approach used across the product line.
eXtended-reach Hybrid Orbital Transfer Systems (XHOTS)
Parabilis' eXtended-reach Hybrid Orbital Transfer Systems (XHOTS) scales the same hybrid technology of HOTS for higher-energy missions. XHOTS targets platforms in the 500–1000 kg range and is sized for 2–6 km/s total delta-v with thrust levels from 250–3000 lb.
It leverages the core advantages of Parabilis' hybrid propulsion with safe, green propellants (solid fuel with nitrous-oxide oxidizer), restart capability, long-term storability, and a compact, simple architecture, while scaling thrust and total impulse. This performance envelope supports emerging mission operations that require significantly higher maneuver capability at scale than is available with today's technologies.