RS-25 Engine Tests Modernization Upgrades
- NASA Administrator Bridenstine viewed Aerojet Rocketdyne’s RS-25 engine test at NASA Stennis;
four RS-25 engines will power NASA’s Space Launch System.
- The development engine tested features a main combustion chamber manufactured with an innovative bonding technique, cutting costs and fabrication time by 50 percent
- Fifth successful demonstration of a 3-D printed
Pogo Assemblyand tested new flight controller
STENNIS SPACE CENTER, Miss.,
The occasion was a hot-fire test of an RS-25 development engine where its main combustion chamber (MCC), the very heart of the engine, was fabricated using a bonding technique called hot isostatic pressing (HIP), an innovative manufacturing process that saves considerable time and money over more traditional methods. Initial test data indicates the chamber performed flawlessly during the 319-second test, which represents the anticipated SLS flight profile.
Each SLS is powered by
“As we develop a new generation of RS-25 engines, ensuring they continue to remain reliable while reducing costs is a major focus at Aerojet Rocketdyne,” said Eileen Drake, Aerojet Rocketdyne CEO and president. “That’s why we’re working hard to drive down costs on the RS-25 by incorporating the most modern and efficient manufacturing techniques.”
Aerojet Rocketdyne is under contract to manufacture an initial set of six new engines for future SLS missions. These new engines will be fabricated using the components and techniques that are being validated now on development engines at Stennis. The test today also marked the fifth successful demonstration of an additively manufactured
A HIP-bonded MCC is the latest component developed under the new engine contract to enter hot-fire testing. The HIP-bonding technique employs high pressure and heat to create bonds between engine details that can withstand extremely high stress applications. In the case of the RS-25 MCC, where the engine’s “smoke and fire” initiates, that means withstanding combustion temperatures exceeding 6,000 degrees Fahrenheit and pressures over 3,000 psi.
“The HIP-bonded MCC is the single largest affordability improvement being incorporated into the new RS-25 engines,” continued Drake. “It cuts in half both the cost and fabrication cycle time compared to the heritage Space Shuttle Main Engines. HIP bonding is also an extremely robust and predictable process, which greatly reduces process variation.”
HIP-bonded combustion chambers are flying today on Aerojet Rocketdyne’s RS-68A engines, the booster engine for United Launch Alliance’s Delta IV satellite-launching workhorse. The process was also successfully validated during the J-2X upper stage and the X-33 Linear Aerospike engine development programs.
“We were incredibly honored to have Administrator Bridenstine witness an RS-25 engine and see first-hand the affordability initiatives we are undertaking with this engine and program,” added Drake.
About Aerojet Rocketdyne: Aerojet Rocketdyne, a subsidiary of
A photo accompanying this announcement is available at http://www.globenewswire.com/NewsRoom/AttachmentNg/0ef959af-0cfc-4e14-ad5f-70295c34e4da
Source: Aerojet Rocketdyne, Inc.