Booster 7


Booster 7 (B7) was a Super Heavy booster prototype that took flight for the first near orbital flight attempt In April 20 2023, after booster 4 (B4) was retired.

Test history


Tue 04, Apr 2023

a year ago

Cryo proof test

B7 first cryo proof test, both tanks fully frosted up at the nearly same pace (CH4 tank frost reaching the top faster);


Fri 31, Mar 2023

a year ago

Roll out

In the early morning of March 31, 2022, SpaceX rolled out B7 from the high bay to the orbital launch site very quickly, although its grid fins haven't been installed yet.


Booster 7 (B7) succeeded Booster 4 (B4) and made its near-orbital flight debut on April 20, 2023. It was the first Super Heavy booster to incorporate 33 Raptor 2 engines. After its initial rollout on March 31, 2022, B7 underwent an extensive testing phase. Its inaugural static fire on the orbital launch mount took place on August 9, 2022. Earlier, a spin prime test on July 12, 2022, led to an explosion at the launch mount due to cryogenic fuel reacting with the atmospheric oxygen, causing some damage to both the mount and the booster's engines.

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