such as the effort seen in 2011 when an upgraded turbopump underwent a Preliminary Design Review (PDR) as part of the Next Generation Engine (NGE) project for the US Air Force, of which ULA ...

Different approaches are chosen, ranging from the improvement of conventional methods to the development of new concepts with which, for example, genetic algorithms can be trained for the design ...

Utilizing liquid-propellant, the Merlin has a turbopump design with a single shaft that ... the staged combustion cycle found in other rocket engines, the Merlin uses a gas generator cycle ...