SACRAMENTO, Calif. - Aerojet Rocketdyne and United Launch Alliance (ULA) have signed a contract for a joint investment to complete technical feasibility analysis, detailed program plans, technology integration, affordable production processes and plans, mission assurance, and related criteria for a number of rocket programs. The efforts will eventually lead to a competitive cost estimate, schedule and risk management plans. Engines included in the effort are the new AR1 as well as current RS-68 and RL10 solid rocket motors. This activity is in support of ULA as it prepares to execute Phase 2 of the Evolved Expendable Launch Vehicle (EELV) program.
The development program will support the EELV as the Air Force seeks to upgrade its launch vehicles. A number of factors are driving the need for upgrades. One is increases tension between Russia and the United States. Conflict over Ukraine has lead the U.S. to seek alternatives to the Russian-built RD-180 engine that is currently being used to power the Atlas V. The AR1 has been proposed as one alternative to the RD-180.
Another factor driving upgrades are an increased focus on cost reduction. Improved engines could improve efficiency. More powerful engines will also make the Atlas V and Delta IV launch vehicles more capable. The RS-68 powers the Delta IV first stage, while variants of the RL10 power the upper stages of both the Atlas V and Delta IV. Improvements to these engines will improve the capabilities of both those launch vehicles.
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