Super Heavy booster

Booster 21

Cryo Proof
Type
Booster
Block
TBD
Current stage
Cryo Proof
Location
TBD
Facing
IFT-14 candidate
Milestones
4

Production timeline

  1. 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
  2. Stacking29 JUN '26
    Booster 21 forward section F:11 stacked atop aft A:25 on 28-29 Jun, completing the stack.
  3. Stacking25 JUN '26
    Booster 21 forward section (F3:4) moved into Mega Bay 1 for stacking.
  4. Stacking14 JUN '26
    Booster 21 undergoing stacking in Mega Bay 1 ahead of Flight Test 14 (with Ship 41).