B7

B7 embodies the first generation of operational Super Heavy boosters: 33 Raptors instead of 29 on the previous generation and, above all, the switch to Raptor 2, more powerful, simpler and more reliable than Raptor 1.5. Still fitted with a hydraulic system, its COPV layout was redesigned to integrate them into two chines, improving the booster's aerodynamic properties. B7 went through many cryo tests, had several notable incidents (broken methane downcomer, explosive spin prime) and performed no fewer than 7 static fires. It flew with S24 on the first flight but lost several engines and flight control after a TVC failure. It exploded at 3 min 59 s.