Orbit Transfer Stage
Powered by the Mjölnir full flow staged combustion engine - with the highest specific power of any chemical rocket thermodynamic cycle
The high-performance engine enables the design of a small and lightweight Orbital Transfer Stage (OTS) due to both its performance and the high bulk density of LOX/LNG fuel, which is over twice that of LOX/LH2 fuels. This level of performance and dense propellants allow delivery of a reliable, long-life, light-weight, and low-cost OTS with key performance parameters:
Powered by a high-performance full-flow staged combustion engine.
Throttleable from 30% to 100% thrust.
Autogenous pressurization with unlimited zero-g restarts.
Access to all cislunar orbits.
Mjölnir has the potential to be an expendable NASA OTS evolving into a lunar lander and a fully reusable OTS. From LEO a 3,000 lb gross OTS can deploy a 400 lb payload to GEO and over 200 lbs to any location in cislunar space, including Earth escape velocity.
A 3,000 lb OTS also has potential military applications by enabling responsive military space domain awareness throughout cislunar space.
The OTS has a small form factor optimized for launch inside the fairing of venture-class vehicles.
The Mjölnir engine will be available for OTS, lunar lander, or related capabilities in 2024.
Download the factsheet.