17
$\begingroup$

The Shuttle boosters had 4 segments and Artemis has 5. What are the differences in total mass, thrust and burn time? Is the thrust profile (thrust over time) the same?

$\endgroup$

1 Answer 1

21
$\begingroup$

(This answer assumes the the SLS SRBs are the same as the Five-Segment Boosters (FSBs) studied for a shuttle upgrade...I believe they are, but have not seen this explicitly stated).

The thrust time curves are compared here

enter image description here

  • RSRM = Redesigned Solid Rocket Motor (shuttle SRB)
  • FSB1 = Five Segment Booster (not sure about the 1)

Reference (a paper by my old boss):

Achieving Space Shuttle Abort-to-Orbit Using the Five-Segment Booster

Weight difference:

Other differences:

enter image description here

Ignore the part about parachutes. No chutes on SLS boosters.

Source:

Achieving Space Shuttle ATO Using the Five-Segment Booster (FSB)

Addendum:

Thanks to Jörg W Mittag who suggested in a comment that the SLS SRBs might have been derived from the Ares 1 design. I found a plot for that, which looks superficially similar to the one above except for maybe a bigger thrust difference on the "second hump". Also it's a clearer image.

enter image description here

Source Ares First Stage Element Status

$\endgroup$
4
  • 2
    $\begingroup$ Great comparison, but that NASA fact sheet for the SLS SRB gives 3.6 million pounds and 126 sec. burntime. Not that much of a difference though ! :) $\endgroup$
    – Cornelis
    Aug 30, 2022 at 10:16
  • 2
    $\begingroup$ @Cornelis thanks! I'll try and find a newer thrust-time curve. $\endgroup$ Aug 30, 2022 at 11:48
  • $\begingroup$ I heard that the SLS FSBs are actually (based on) the Ares I first stage ones. Could that account for the thrust profile difference? $\endgroup$ Aug 30, 2022 at 18:48
  • $\begingroup$ @JörgWMittag thanks! A curve for Ares might be available. $\endgroup$ Aug 30, 2022 at 19:22

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

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