https://behindtheblack.com/behind-the-black/points-of-information/ula-picks-aerojet-rocketdyne-engine-for-vulcan-upper-stage/ Sun, 13 May 2018 18:37:19 +0000 hourly 1 https://wordpress.org/?v=6.9.4 https://behindtheblack.com/behind-the-black/points-of-information/ula-picks-aerojet-rocketdyne-engine-for-vulcan-upper-stage/#comment-1051862 Sun, 13 May 2018 18:37:19 +0000 http://behindtheblack.com/?p=51645#comment-1051862 As has been pointed out elsewhere, this isn’t the engine selection for ACES, this is just official contractual confirmation of what everyone knew, Vulcan is going to start off using a Centaur upper stage, which of course will use RL-10 engines. That said, they’re pretty clearly leaning towards sticking with the RL-10 for ACES, and this sets the ground for more dev work on the RL-10 to bring costs down.

]]> https://behindtheblack.com/behind-the-black/points-of-information/ula-picks-aerojet-rocketdyne-engine-for-vulcan-upper-stage/#comment-1051749 Sat, 12 May 2018 20:04:05 +0000 http://behindtheblack.com/?p=51645#comment-1051749 This would seem to make the selection of the BE-4 more likely. AR has now gotten a cut of the Vulcan pie, which should make losing out on the AR-1 more palatable to congressional stakeholders.

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