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  [Discuss] SLS composite booster development

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Author Topic:   [Discuss] SLS composite booster development
Robert Pearlman
Editor

Posts: 48793
From: Houston, TX
Registered: Nov 1999

posted 02-17-2015 04:30 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
Editor's note: In an effort to keep the topic SLS: Composite booster development and tests focused on status updates, readers' feedback and opinions are directed to this thread.

Please use this topic to discuss NASA's and Orbital ATK's development of an advanced composite booster for the Space Launch System (SLS).

cspg
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Posts: 6312
From: Geneva, Switzerland
Registered: May 2006

posted 02-18-2015 05:07 AM     Click Here to See the Profile for cspg   Click Here to Email cspg     Edit/Delete Message   Reply w/Quote
How does this differ (or not) from the planned filament-wound boosters that were planned for the space shuttle and abandoned after Challenger/STS-51L?

Jim Behling
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Posts: 1736
From: Cape Canaveral, FL
Registered: Mar 2010

posted 02-18-2015 06:23 AM     Click Here to See the Profile for Jim Behling   Click Here to Email Jim Behling     Edit/Delete Message   Reply w/Quote
I believe the total length is longer and there are fewer segments.

garymilgrom
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Posts: 2091
From: Atlanta, GA
Registered: Feb 2007

posted 02-18-2015 04:12 PM     Click Here to See the Profile for garymilgrom   Click Here to Email garymilgrom     Edit/Delete Message   Reply w/Quote
I thought this was called a 5-segment booster? (I believe the shuttle's SRB's had only 4). Maybe I am not understanding it well.

Robert Pearlman
Editor

Posts: 48793
From: Houston, TX
Registered: Nov 1999

posted 02-18-2015 04:42 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
The initial 70-metric-ton SLS will use two five-segment solid rocket boosters similar to the boosters that powered the space shuttle.

An evolved 130-metric-ton SLS will require an advanced booster with more thrust than any existing U.S. liquid- or solid-fueled boosters.

To that end, NASA has contracted with four companies to study an advanced booster for the future version of the SLS. Orbital ATK, as one of these companies, is advancing its composite motors as its proposal for the advanced booster.

Paul78zephyr
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Posts: 768
From: Hudson, MA
Registered: Jul 2005

posted 07-29-2022 09:21 PM     Click Here to See the Profile for Paul78zephyr     Edit/Delete Message   Reply w/Quote
Are the BOLE (Booster Obsolescence and Life Extension) boosters with composite cases anything like the FW cases designed and built in the late 1980s (but ultimately not used)?

Also do all of the post-shuttle era boosters to be used on Artemis/SLS (including the BOLE boosters) still use the post-Challenger SRB field joint design verbatim?

Editor's note: Threads merged.

Robert Pearlman
Editor

Posts: 48793
From: Houston, TX
Registered: Nov 1999

posted 07-29-2022 09:28 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
The BOLE design is a more modern, advanced approach to manufacturing filament-wound solid rocket motors. There are many improvements over the legacy hardware used and designed for the space shuttle, as detailed here.

Those improvements include the types of seals used:

An area of emphasis for the case design has been in seals design, and the team has developed sealing systems that are not only mass efficient, but have sealing capability that is significantly improved over heritage RSRMV [Reusable Solid Rocket Motor-V] designs.

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