The Space Launch System is designed around remaining Space Shuttle program hardware, plus a Delta Cryogenic Second Stage, known as the Interim Cryogenic Propuls

The Space Launch System is designed around remaining Space Shuttle program hardware, plus a Delta Cryogenic Second Stage, known as the Interim Cryogenic Propulsion Stage.[1] One SLS flight has already been made, Artemis I [2] There are enough modified shuttle SRBs for 7 more flights, enough Space Shuttle Main Engines for 3 more flights, and the ICPS is only intended for use on two more flights. All Space Launch System Flights after Artemis III are intended to use new replacements for these systems. The BOLE (that just failed) is the intended replacement for the modified shuttle SRBs. The RS-25E replacement for the Space Shuttle Main Engines was successfully test-fired earlier this week. [3] 1. https://en.wikipedia.org/wiki/Delta_Cryogenic_Second_Stage https://en.wikipedia.org/wiki/Delta_Cryogenic_Second_Stage 2. https://en.wikipedia.org/wiki/Artemis_I https://en.wikipedia.org/wiki/Artemis_I 3. https://news.satnews.com/2025/06/25/nasa-l3harris-hot-fire-test-the-new-rs-25-rocket-engine-for-artemis/ https://news.satnews.com/2025/06/25/nasa-l3harris-hot-fire-t...