Knowledge of research and testing activities associated
with liquid and solid rocket propulsion. Includes knowledge
of combustion devices, cryogenic tanks, propellant
feedlines, tank pressurization systems, engine systems, and
propulsion system subcomponents such as gas generators,
thrust chambers, turbopump assemblies, valves, propellant
ducts, and auxiliary propulsion systems, as well as
application of combined cycle systems to advanced
propulsion techniques.