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What are they doing to this rocket following its test fire?

What would one learn by borescoping a rocket engine after an aborted launch?

14

$begingroup$

Watching video of today's test of Northrop Grumman's OmegA first stage SRB after the test is over and the flames have died down a bit, it looks like they are sticking something into the back end of this rocket to probe it.

Question: What is the device shown in the rocket's nozzle, and what purpose does it serve?

Screenshot from OmegA Milestone: First Stage Static Test Fire

identify-this-object srb omega-rocket

share|improve this question

edited Jun 1 at 16:47

Community♦

1

asked May 31 at 7:14

uhohuhoh

44k21172569

$endgroup$

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  3
  

  
  
  
  
  
  

  
  $begingroup$
  Related: what would one learn by borescoping a rocket engine?
  $endgroup$
  – Russell Borogove
  May 31 at 8:05
  
  

  
  
  
  


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  2
  

  
  
  
  
  
  

  
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  LOL, they "borescope" SRBs by lowering a technician down into it on a sling.
  $endgroup$
  – Organic Marble
  May 31 at 21:00
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
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  Is the nozzle supposed to look that damaged?
  $endgroup$
  – Moo
  Jun 1 at 4:14
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Much better... :) Down vote removed.
  $endgroup$
  – RonJohn
  Jun 1 at 11:44
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  @Moo no, it suffered a failure late in the test.
  $endgroup$
  – Organic Marble
  Jun 1 at 12:04
  

  
  
  
  

 | 
show 1 more comment

14

$begingroup$

Watching video of today's test of Northrop Grumman's OmegA first stage SRB after the test is over and the flames have died down a bit, it looks like they are sticking something into the back end of this rocket to probe it.

Question: What is the device shown in the rocket's nozzle, and what purpose does it serve?

Screenshot from OmegA Milestone: First Stage Static Test Fire

identify-this-object srb omega-rocket

share|improve this question

edited Jun 1 at 16:47

Community♦

1

asked May 31 at 7:14

uhohuhoh

44k21172569

$endgroup$

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  $begingroup$
  Related: what would one learn by borescoping a rocket engine?
  $endgroup$
  – Russell Borogove
  May 31 at 8:05
  
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  LOL, they "borescope" SRBs by lowering a technician down into it on a sling.
  $endgroup$
  – Organic Marble
  May 31 at 21:00
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  Is the nozzle supposed to look that damaged?
  $endgroup$
  – Moo
  Jun 1 at 4:14
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Much better... :) Down vote removed.
  $endgroup$
  – RonJohn
  Jun 1 at 11:44
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  @Moo no, it suffered a failure late in the test.
  $endgroup$
  – Organic Marble
  Jun 1 at 12:04
  

  
  
  
  

 | 
show 1 more comment

$begingroup$

Watching video of today's test of Northrop Grumman's OmegA first stage SRB after the test is over and the flames have died down a bit, it looks like they are sticking something into the back end of this rocket to probe it.

Question: What is the device shown in the rocket's nozzle, and what purpose does it serve?

Screenshot from OmegA Milestone: First Stage Static Test Fire

identify-this-object srb omega-rocket

share|improve this question

edited Jun 1 at 16:47

Community♦

1

asked May 31 at 7:14

uhohuhoh

44k21172569

$endgroup$

share|improve this question

edited Jun 1 at 16:47

Community♦

1

asked May 31 at 7:14

uhohuhoh

44k21172569

share|improve this question

edited Jun 1 at 16:47

Community♦

1

asked May 31 at 7:14

uhohuhoh

44k21172569

edited Jun 1 at 16:47

Community♦

1

edited Jun 1 at 16:47

Community♦

1

asked May 31 at 7:14

uhohuhoh

44k21172569

asked May 31 at 7:14

uhohuhoh

44k21172569

2 Answers
2

active

oldest

votes

21

$begingroup$

It's a quenching probe.

After burnout of the booster was confirmed, a CO2 fire extinguisher was moved into the nozzle area to inject carbon dioxide into the booster to kill any remaining fire in order to preserve the systems in their condition at burnout, allowing for a detailed study of the components of the SRB. 

Source: http://www.spaceflight101.net/sls-srb---qm-1-updates.html

(This is from an article on a Space Launch System SRB test)

Presumably required due to the non-flight-like horizontal attitude at burnout.

share|improve this answer

edited May 31 at 10:57

answered May 31 at 9:42

Organic MarbleOrganic Marble

64.9k4180274

$endgroup$

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  It may be required in order to preserve the engine (as much as possible) for inspection afterwards.
  $endgroup$
  – ceejayoz
  May 31 at 13:09
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  @ceejayoz that is indeed the purpose as stated in the quote in my answer.
  $endgroup$
  – Organic Marble
  May 31 at 21:19
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  @OrganicMarble I'm pretty sure a comment got deleted somewhere that I was replying to.
  $endgroup$
  – ceejayoz
  May 31 at 21:28
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  I'm guessing this is unburnt "ash"? Actual solid fuel contains an oxidiser and would keep burning in a CO2 atmosphere, wouldn't it?
  $endgroup$
  – Rich
  Jun 1 at 3:25
  

  
  
  
  


• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  $begingroup$
  So they're probing the rocket's action end. For science.
  $endgroup$
  – Machavity
  Jun 1 at 3:28
  

  
  
  
  

 | 
show 5 more comments

2

$begingroup$

Structural failure of the nozzle happens prior to the probe being inserted. Without the nozzle, parts of the tail end of the rocket were burning and were not supposed to be. The fire was then extinguished with the probe to save the rocket itself and to save any evidence of why the nozzle exploded.

share|improve this answer

answered Jun 2 at 19:06

J. P. SmithJ. P. Smith

211

New contributor

J. P. Smith is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  The probe was used on every test, whether the nozzle was damaged is irrelevant.
  $endgroup$
  – Organic Marble
  5 hours ago
  

  
  
  
  

add a comment | 

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21

$begingroup$

It's a quenching probe.

After burnout of the booster was confirmed, a CO2 fire extinguisher was moved into the nozzle area to inject carbon dioxide into the booster to kill any remaining fire in order to preserve the systems in their condition at burnout, allowing for a detailed study of the components of the SRB. 

Source: http://www.spaceflight101.net/sls-srb---qm-1-updates.html

(This is from an article on a Space Launch System SRB test)

Presumably required due to the non-flight-like horizontal attitude at burnout.

share|improve this answer

edited May 31 at 10:57

answered May 31 at 9:42

Organic MarbleOrganic Marble

64.9k4180274

$endgroup$

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  It may be required in order to preserve the engine (as much as possible) for inspection afterwards.
  $endgroup$
  – ceejayoz
  May 31 at 13:09
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  @ceejayoz that is indeed the purpose as stated in the quote in my answer.
  $endgroup$
  – Organic Marble
  May 31 at 21:19
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  @OrganicMarble I'm pretty sure a comment got deleted somewhere that I was replying to.
  $endgroup$
  – ceejayoz
  May 31 at 21:28
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  I'm guessing this is unburnt "ash"? Actual solid fuel contains an oxidiser and would keep burning in a CO2 atmosphere, wouldn't it?
  $endgroup$
  – Rich
  Jun 1 at 3:25
  

  
  
  
  


• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  $begingroup$
  So they're probing the rocket's action end. For science.
  $endgroup$
  – Machavity
  Jun 1 at 3:28
  

  
  
  
  

 | 
show 5 more comments

21

$begingroup$

It's a quenching probe.

After burnout of the booster was confirmed, a CO2 fire extinguisher was moved into the nozzle area to inject carbon dioxide into the booster to kill any remaining fire in order to preserve the systems in their condition at burnout, allowing for a detailed study of the components of the SRB. 

Source: http://www.spaceflight101.net/sls-srb---qm-1-updates.html

(This is from an article on a Space Launch System SRB test)

Presumably required due to the non-flight-like horizontal attitude at burnout.

share|improve this answer

edited May 31 at 10:57

answered May 31 at 9:42

Organic MarbleOrganic Marble

64.9k4180274

$endgroup$

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  It may be required in order to preserve the engine (as much as possible) for inspection afterwards.
  $endgroup$
  – ceejayoz
  May 31 at 13:09
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  @ceejayoz that is indeed the purpose as stated in the quote in my answer.
  $endgroup$
  – Organic Marble
  May 31 at 21:19
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  @OrganicMarble I'm pretty sure a comment got deleted somewhere that I was replying to.
  $endgroup$
  – ceejayoz
  May 31 at 21:28
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  I'm guessing this is unburnt "ash"? Actual solid fuel contains an oxidiser and would keep burning in a CO2 atmosphere, wouldn't it?
  $endgroup$
  – Rich
  Jun 1 at 3:25
  

  
  
  
  


• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  $begingroup$
  So they're probing the rocket's action end. For science.
  $endgroup$
  – Machavity
  Jun 1 at 3:28
  

  
  
  
  

 | 
show 5 more comments

$begingroup$

It's a quenching probe.

After burnout of the booster was confirmed, a CO2 fire extinguisher was moved into the nozzle area to inject carbon dioxide into the booster to kill any remaining fire in order to preserve the systems in their condition at burnout, allowing for a detailed study of the components of the SRB. 

Source: http://www.spaceflight101.net/sls-srb---qm-1-updates.html

(This is from an article on a Space Launch System SRB test)

Presumably required due to the non-flight-like horizontal attitude at burnout.

share|improve this answer

edited May 31 at 10:57

answered May 31 at 9:42

Organic MarbleOrganic Marble

64.9k4180274

$endgroup$

share|improve this answer

edited May 31 at 10:57

answered May 31 at 9:42

Organic MarbleOrganic Marble

64.9k4180274

answered May 31 at 9:42

Organic MarbleOrganic Marble

64.9k4180274

answered May 31 at 9:42

Organic MarbleOrganic Marble

64.9k4180274

2

$begingroup$

Structural failure of the nozzle happens prior to the probe being inserted. Without the nozzle, parts of the tail end of the rocket were burning and were not supposed to be. The fire was then extinguished with the probe to save the rocket itself and to save any evidence of why the nozzle exploded.

share|improve this answer

answered Jun 2 at 19:06

J. P. SmithJ. P. Smith

211

New contributor

J. P. Smith is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  The probe was used on every test, whether the nozzle was damaged is irrelevant.
  $endgroup$
  – Organic Marble
  5 hours ago
  

  
  
  
  

add a comment | 

2

$begingroup$

Structural failure of the nozzle happens prior to the probe being inserted. Without the nozzle, parts of the tail end of the rocket were burning and were not supposed to be. The fire was then extinguished with the probe to save the rocket itself and to save any evidence of why the nozzle exploded.

share|improve this answer

answered Jun 2 at 19:06

J. P. SmithJ. P. Smith

211

New contributor

J. P. Smith is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  The probe was used on every test, whether the nozzle was damaged is irrelevant.
  $endgroup$
  – Organic Marble
  5 hours ago
  

  
  
  
  

add a comment | 

$begingroup$

Structural failure of the nozzle happens prior to the probe being inserted. Without the nozzle, parts of the tail end of the rocket were burning and were not supposed to be. The fire was then extinguished with the probe to save the rocket itself and to save any evidence of why the nozzle exploded.

share|improve this answer

answered Jun 2 at 19:06

J. P. SmithJ. P. Smith

211

New contributor

J. P. Smith is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

share|improve this answer

answered Jun 2 at 19:06

J. P. SmithJ. P. Smith

211

New contributor

J. P. Smith is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

answered Jun 2 at 19:06

J. P. SmithJ. P. Smith

211

New contributor

J. P. Smith is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

answered Jun 2 at 19:06

J. P. SmithJ. P. Smith

211