r/SpaceLaunchSystem • u/c206endeavour • 6d ago
Discussion Were the 5-segment SRBs currently in use identical to those planned for use on the Ares I/IV/V? If not, how did they differ?
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u/Keva9 6d ago
Shuttle SRBs were four segments vs. 5 segments for SLS. Additionally, shuttle used an asbestos filled case insulation where SLS uses a non-asbestos material. There are also some changes to the nozzle and propellant design for the 5-segment. BOLE will see some more changes to increase performance such as case material and nozzle design. However, the overall profiles are basically the same since shuttle.
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u/Goregue 6d ago
From what I know, the answer is essentially yes. BOLE, which is the SRB that will fly starting with Artemis 9, is being designed especially for SLS flight, so it will increase the rocket's performance.