An Hydrogen Serial Engine (HSE) is an engine that combusts water in a cyclic way to achieve a state of superdensity used to set something in motion. The engine is used in a diverse range of technologies, of which the most prominent is space travel. The HSE allows for agile manoeuvring and is also used to enter deep space, reducing travel times to almost nothing. 

An Hydrogen Serial Engine consists of a combustion tank, a tubular semi-cyclic system A, a semi-cyclic system B, a cyclic system, a magnetic propulsion plate, a Munsey pressure chamber, a density tank, two to four chain-engines and a set of Altin-Bruckner plates. This device is able to manipulate density to cause superdensity, which overrules gravity. In a slightly altered way, the technology is also used to introduce artificial gravity in space ships.