4
$\begingroup$

@OrganicMarble's answer shows some very cool looking historical rocket launches.

What is the smaller structure attached to the booster on the right side, that looks like a "baby rocket"?

enter image description here

$\endgroup$

marked as duplicate by Organic Marble, uhoh, Nathan Tuggy, Mark Omo, Jack Aug 3 '18 at 6:15

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

3
$\begingroup$

Those are the tanks for the "fluid thrust vector control" (TVC) system. There's one on each booster.

enter image description here

(from NASA SX-79) TVC would inject NO4 fluid at different points around the circumference of the nozzle to deflect the flow, which changed the thrust direction enough that a gimbeled nozzle wasn't needed.

$\endgroup$

Not the answer you're looking for? Browse other questions tagged or ask your own question.