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Aerojet Rocketdyne completes propulsion systems for Artemis II mission

Stephen Kuper

Aerojet Rocketdyne recently completed all of its propulsion hardware for the first crewed flight of NASA’s Space Launch System (SLS) rocket and Orion spacecraft.

Aerojet Rocketdyne completes propulsion systems for Artemis II mission
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The engines and motors, which Aerojet Rocketdyne produces at its major space operations sites across the country, will support NASA’s Artemis II mission. The Artemis II mission is the second flight of SLS and Orion and the first to send an astronaut crew to fly around the moon.

Four Aerojet Rocketdyne RS-25 engines collectively provide 2 million pounds of thrust to power the core stage of SLS, the world’s most powerful rocket. The company completed upgrading the Artemis II RS-25 engines with advanced components and controllers in November 2019.

Eileen Drake, Aerojet Rocketdyne CEO and president, said, "These are very exciting times for both NASA and the nation. The United States is sending humans beyond low-Earth orbit for the first time in nearly 50 years, and we are travelling even farther with Artemis than we did with Apollo."

Engine assembly and testing was completed at Aerojet Rocketdyne’s facility at NASA’s Stennis Space Center in Mississippi, and all four engines are ready for integration with the Artemis II core stage.

Aerojet Rocketdyne’s RL10 engine powers the Interim Cryogenic Propulsion Stage (ICPS), or the second stage, of the SLS. This engine provides the power to accelerate the Orion spacecraft to speeds over 38,000km/h and set it on a course for the moon.

Design, manufacture, assembly and test of the RL10 engine for the Artemis II mission took place at Aerojet Rocketdyne’s West Palm Beach facility in Florida. The engine is ready for installation on the ICPS being manufactured by Boeing and United Launch Alliance in Decatur, Alabama.

Aerojet Rocketdyne provides a number of propulsion systems for the Lockheed Martin-built Orion crew module and the European Service Module that will be used on the Artemis II mission.

Drake added, "The Artemis II mission will be the first time the Space Launch System and Orion will send astronauts into orbit around the moon, and it is a key precursor to landing the first woman and the next man on the moon. Aerojet Rocketdyne propulsion systems will play a critical role in making this endeavour a reality."

The biggest of these is the jettison motor, which generates 40,000 pounds of thrust for the Launch Abort System (LAS). The jettison motor pulls the LAS off the crew module during both nominal operations and abort modes. Qualification testing was conducted at Redstone Arsenal in Huntsville, Alabama, and assembly of the Artemis II motor was completed in October 2019 at Aerojet Rocketdyne’s facility in Orange, Virginia, and delivered to Lockheed Martin in February 2020.

Once in space, the Orion Main Engine (OME) on the service module will manoeuvre the spacecraft. Aerojet Rocketdyne is the original manufacturer of the OME, which was originally built and used for the space shuttle program. In March 2019, Aerojet Rocketdyne provided key valve and thermal components to NASA to complete the refurbishment of the Artemis II OME.

Also aboard Orion, Aerojet Rocketdyne is responsible for eight auxiliary engines on the service module and 12 reaction control thrusters on the crew module. The auxiliary engines, built in Redmond, Washington, each generate 110 pounds of thrust to provide position control while backing up the OME for required thrust. They were provided in March 2019 to Lockheed Martin for shipment to Europe for integration into the service module.

The reaction control system thrusters, also built in Redmond, each generating 160 pounds of thrust, will be used to control and properly orient the Orion crew module during its atmospheric re-entry. Those thrusters were delivered in March 2020.

Aerojet Rocketdyne, a subsidiary of Aerojet Rocketdyne Holdings, is a world-recognised aerospace and defence leader that provides propulsion systems and energetics to the space, missile defence and strategic systems, and tactical systems areas, in support of domestic and international customers.

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