United Launch Alliance (ULA), the prime contractor for the Space Launch System’s (SLS’s) Interim Cryogenic Propulsion Stage (ICPS), has declared the stage’s overall performance on the ...

The four RS-25 engines from Aerojet Rocketdyne successfully propelled the Core Stage, Interim Cryogenic Propulsion System, and Orion/Service Module stack into its initial Earth orbit during the ...

One issue involves a valve in the Interim Cryogenic Propulsion Stage (ICPS), a propulsion module that’s being used on the early SLS flights to provide the trans-lunar injection (TLI) burn that ...

These first three lunar missions use an the interim cryogenic propulsion stage to boost the Orion spacecraft, which is a single-engine stage, NASA officials explained. The missions starting with ...