Comments on: Engine problems on a Delta 4 rocket launch two weeks ago could delay the launch of the Atlas 5 rocket scheduled to lift the X-37B on its next mission. https://behindtheblack.com/behind-the-black/points-of-information/engine-problems-on-a-delta-4-rocket-launch-two-weeks-ago-could-delay-the-launch-of-the-atlas-5-rocket-scheduled-to-lift-the-x-37b-on-its-next-mission/ Fri, 19 Oct 2012 19:39:11 +0000 hourly 1 https://wordpress.org/?v=6.9.4 By: Robert Zimmerman https://behindtheblack.com/behind-the-black/points-of-information/engine-problems-on-a-delta-4-rocket-launch-two-weeks-ago-could-delay-the-launch-of-the-atlas-5-rocket-scheduled-to-lift-the-x-37b-on-its-next-mission/#comment-67754 Fri, 19 Oct 2012 19:39:11 +0000 http://behindtheblack.com/?p=20367#comment-67754 In reply to Patrick Ritchie.

Patrick,

An excellent point. I hadn’t realized they used a variant of the same engine.

]]> By: Patrick Ritchie https://behindtheblack.com/behind-the-black/points-of-information/engine-problems-on-a-delta-4-rocket-launch-two-weeks-ago-could-delay-the-launch-of-the-atlas-5-rocket-scheduled-to-lift-the-x-37b-on-its-next-mission/#comment-67753 Fri, 19 Oct 2012 17:28:36 +0000 http://behindtheblack.com/?p=20367#comment-67753 Both the Delta IV and the Atlas V use variants of the RL-10 engine in their upper stages. Given that both variants are produced by the same company (and I assume in the same plant) it would seem prudent to at least look into the issue to make sure it’s not common to both engine variants.

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