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toodroot t1_j0ngdv6 wrote

> ULA but they have shown little willingness to innovate from a tried and true method.

ACES and on-orbit refueling is an awesome concept, too bad NASA has shown very little interest in it.

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A_Vandalay t1_j0nxed7 wrote

They have long since abandoned ACES in favor of incremental upgrades to centaur such as improved performance and on orbit lifetime. These are primarily geared towards national security payloads and don’t really offer much in the way of revolutionary change.

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