Interim Cryogenic Propulsion Stage (ICPS)
Giving Orion the big push needed to fly beyond the Moon.
ICPS is a modified Delta IV Cryogenic Second Stage for NASA's Artemis program.
For the Artemis missions, the stage feeds liquid hydrogen and liquid oxygen to the Aerojet Rocketdyne RL10 main engine to produce 24,750 pounds (110.1 kilo-Newtons) of highly efficient thrust.
ULA has built three ICPS stages for each of the first three Artemis missions to the Moon through a collaborative partnership with Boeing.
NASA's SLS with ICPS is one of the most powerful rockets ever developed, producing 8.8 million pounds of thrust during liftoff to loft a vehicle weighing nearly six million pounds.
What is ICPS?
Status Check Blog
ICPS-1: ULA teams support Artemis I countdown and launch
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ICPS-1: Stage stacked atop first SLS rocket
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ICPS-2: ULA-built upper stage arrives for Artemis II launch
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ICPS-2: Rendezvous target guides Artemis II Orion demonstrations
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ICPS-3: Upperstage that will propel Artemis III astronauts to the Moon arrives for processing
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