tag:blogger.com,1999:blog-8472211903033725545.post3057823502230980529..comments2024-01-12T12:52:08.097-07:00Comments on Billlls Idle Mind: The Future Of Humanity - Rocket FuelBillllhttp://www.blogger.com/profile/13913354887560267235noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-8472211903033725545.post-20139135136799629562017-07-23T21:53:11.774-07:002017-07-23T21:53:11.774-07:00If I understand things correctly, it also depends ...If I understand things correctly, it also depends on altitude, or the thickness of the atmosphere. At lower altitudes, RP1 actually performs better. At higher altitudes and in space, LH does better.<br /><br />The Saturn V used RP1 on its first stage, then LH for the second and third. SpaceX only uses RP1 (for simplicity), but they made adjustments to their second stage to improve performance in space. The shuttle, and SLS, of course, had the huge LH/LOX ET, but they use SRBs for low altitude thrust.Stevehttps://www.blogger.com/profile/04829766843115897356noreply@blogger.com