The fast development time is due in part to the novel use of repurposed SCUBA air tanks and a rocket engine that uses cold gas, in place of a conventional fuel/oxidizer or monopropellant engine.
A concept to provide low Earth orbit (LEO) propellant depots that could be used as way-stations for other spacecraft to stop and refuel on the way to beyond-LEO missions has proposed that waste gaseous hydrogen—an inevitable byproduct of long-term liquid hydrogen storage in the radiative heat environment of space—would be usable as a monopropellant in a solar-thermal propulsion system.
Catalytic decomposition of T-Stoff by Z-Stoff was also used as a monopropellant in several "cold" Walter rocket engines, including early versions of the engine for the Me 163A, and rocket-assisted takeoff pack engines like the Walter HWK 500.