Super Heavy booster

Booster 21

Static Fire
Type
Booster
Block
TBD
Current stage
Static Fire
Location
TBD
Facing
IFT-14 candidate
Milestones
6

Production timeline

  1. Static Fire28 AUG '26
    STATIC FIRE Starship Booster 21 performed what looked like a 14 second multi engine static fire test ahead of flight 14
  2. Engine Install24 AUG '26
    B21 engine installation complete (all engines installed); now awaiting rollout to pad NET Aug 25 for Flight Test 14.
  3. Cryo Proof21 JUL '26
    Following two partial tests in the previous days, Starship Booster 21 (flight 14) completed a full tanking cyro test, with the booster fully frosty
  4. Stacking29 JUN '26
    Booster 21 forward section F:11 stacked atop aft A:25 on 28-29 Jun, completing the stack.
  5. Stacking25 JUN '26
    Booster 21 forward section (F3:4) moved into Mega Bay 1 for stacking.
  6. Stacking14 JUN '26
    Booster 21 undergoing stacking in Mega Bay 1 ahead of Flight Test 14 (with Ship 41).