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Was the LES used in the MS-10 abort?
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I can find no clear information regarding the use of the launch escape system in today's Soyoz MS-10 abort-to-ground. The failure seems to occur just as LES jettison is scheduled to take place.
The live webcast commentator is clearly describing the events as planned, not as they unfolded, so it is not clear how the Soyuz cleared the rocket without an LES.
soyuz-spacecraft failure launch-escape-system
asked 1 hour ago
dotancohen
3,55411335
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up vote
5
down vote
favorite
I can find no clear information regarding the use of the launch escape system in today's Soyoz MS-10 abort-to-ground. The failure seems to occur just as LES jettison is scheduled to take place.
The live webcast commentator is clearly describing the events as planned, not as they unfolded, so it is not clear how the Soyuz cleared the rocket without an LES.
soyuz-spacecraft failure launch-escape-system
asked 1 hour ago
dotancohen
3,55411335
add a comment |Â
up vote
5
down vote
favorite
up vote
5
down vote
favorite
I can find no clear information regarding the use of the launch escape system in today's Soyoz MS-10 abort-to-ground. The failure seems to occur just as LES jettison is scheduled to take place.
The live webcast commentator is clearly describing the events as planned, not as they unfolded, so it is not clear how the Soyuz cleared the rocket without an LES.
soyuz-spacecraft failure launch-escape-system
asked 1 hour ago
dotancohen
3,55411335
I can find no clear information regarding the use of the launch escape system in today's Soyoz MS-10 abort-to-ground. The failure seems to occur just as LES jettison is scheduled to take place.
The live webcast commentator is clearly describing the events as planned, not as they unfolded, so it is not clear how the Soyuz cleared the rocket without an LES.
soyuz-spacecraft failure launch-escape-system
soyuz-spacecraft failure launch-escape-system
asked 1 hour ago
dotancohen
3,55411335
asked 1 hour ago
dotancohen
3,55411335
asked 1 hour ago
dotancohen
3,55411335
asked 1 hour ago
dotancohen
3,55411335
asked 1 hour ago
dotancohen
3,55411335
3,55411335
add a comment |Â
add a comment |Â
1 Answer
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active
oldest
votes
up vote
5
down vote
No, the Launch Escape System was not used.
The announcer was basing their reporting based on canned telemetry, and did not realize what was going on until after the canned telemetry showed the first stage separation.
These details are still developing, but it appears that during the separation of the strap-on boosters, one of the boosters hit the core stage.
It is a tradition for Soyuz rockets to include a plush toy suspended above the crew on an elastic cord as a quick-and-dirty G-force indicator. About 2 minutes 40 seconds into the video that NASA released of the launch (link to YouTube), during the booster separation, we see an internal shot of the capsule where the toy is suspended to about 3 Gs, then instead of going to just 1.5 Gs as expected, it becomes weightless and the internal cameras glitch out, likely due to the directional antenna not being aligned properly any more.
Next we see the strap-on boosters flying away asymmetrically, instead of the usual Korolev Cross, we see 3 boosters tumble away, signs of heavy debris, and the exhaust from the core stage is very asymmetrical.
The video then goes on to show the canned telemetry, but we can hear the translator quietly in the background giving details about loss of thrust as they translate the crew's broadcasts.
The LES tower was not jettisoned, but also was not used. This is likely because there was no debris to escape from due to still being well within the atmosphere, and no explosion to forcefully shove debris towards the crew. Without immediate danger to the crew, there was no need to subject them to the 14 Gs of acceleration that the Soyuz LES tower produces.
The crew would have performed an emergency separation from the rocket, which consists of detaching the Service Module from the third stage and jettisoning both the LES tower and fairing at the same time, firing the Service Module's engines momentarily to get away from the rocket, then detaching the Entry Module from the Orbital Module and Service Module. Aerodynamic drag would further separate the Entry Module from the rest of the spacecraft.
Scott Manley produced a video further highlighting details of the abort, where I get some additional information from.
answered 1 hour ago
Ghedipunk
26016
I'm not sure this is entirely right - I think the failure occurred after the tower jettison (as you state), but before core stage shutdown. Here's a typical flight profile with core shutdown around +4:45. SpaceflightNow suggests the failure was around +2 minutes.
– Jack
1 hour ago
@Jack I'm taking a closer look at the videos (using the longer version that NASA made available on their YouTube channel: youtube.com/watch?v=LUwnLFKfuBE )... So far I do hear the words "failure of the booster" at about t+165s from the translator, but the announcer acts like everything is nominal and the telemetry shows normal until they cut away shortly after the first stage ends.
– Ghedipunk
1 hour ago
Yeh I noticed that too, I guess maybe the broadcast telemetry isn't really designed to handle this sort of situation? I suspect we'll only get a detailed timeline until after the investigation, but we can be pretty certain it was after the tower jettison
– Jack
57 mins ago
2
Yeah, Scott Manley just posted an analysis. I'll be updating this with better information. Looks like one of the strap-on boosters likely collided with the core stage during separation. They did keep the LES tower on but did not use it... Will gather more details and better sources, then update the answer.
– Ghedipunk
53 mins ago
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
5
down vote
No, the Launch Escape System was not used.
The announcer was basing their reporting based on canned telemetry, and did not realize what was going on until after the canned telemetry showed the first stage separation.
These details are still developing, but it appears that during the separation of the strap-on boosters, one of the boosters hit the core stage.
It is a tradition for Soyuz rockets to include a plush toy suspended above the crew on an elastic cord as a quick-and-dirty G-force indicator. About 2 minutes 40 seconds into the video that NASA released of the launch (link to YouTube), during the booster separation, we see an internal shot of the capsule where the toy is suspended to about 3 Gs, then instead of going to just 1.5 Gs as expected, it becomes weightless and the internal cameras glitch out, likely due to the directional antenna not being aligned properly any more.
Next we see the strap-on boosters flying away asymmetrically, instead of the usual Korolev Cross, we see 3 boosters tumble away, signs of heavy debris, and the exhaust from the core stage is very asymmetrical.
The video then goes on to show the canned telemetry, but we can hear the translator quietly in the background giving details about loss of thrust as they translate the crew's broadcasts.
The LES tower was not jettisoned, but also was not used. This is likely because there was no debris to escape from due to still being well within the atmosphere, and no explosion to forcefully shove debris towards the crew. Without immediate danger to the crew, there was no need to subject them to the 14 Gs of acceleration that the Soyuz LES tower produces.
The crew would have performed an emergency separation from the rocket, which consists of detaching the Service Module from the third stage and jettisoning both the LES tower and fairing at the same time, firing the Service Module's engines momentarily to get away from the rocket, then detaching the Entry Module from the Orbital Module and Service Module. Aerodynamic drag would further separate the Entry Module from the rest of the spacecraft.
Scott Manley produced a video further highlighting details of the abort, where I get some additional information from.
answered 1 hour ago
Ghedipunk
26016
I'm not sure this is entirely right - I think the failure occurred after the tower jettison (as you state), but before core stage shutdown. Here's a typical flight profile with core shutdown around +4:45. SpaceflightNow suggests the failure was around +2 minutes.
– Jack
1 hour ago
@Jack I'm taking a closer look at the videos (using the longer version that NASA made available on their YouTube channel: youtube.com/watch?v=LUwnLFKfuBE )... So far I do hear the words "failure of the booster" at about t+165s from the translator, but the announcer acts like everything is nominal and the telemetry shows normal until they cut away shortly after the first stage ends.
– Ghedipunk
1 hour ago
Yeh I noticed that too, I guess maybe the broadcast telemetry isn't really designed to handle this sort of situation? I suspect we'll only get a detailed timeline until after the investigation, but we can be pretty certain it was after the tower jettison
– Jack
57 mins ago
2
Yeah, Scott Manley just posted an analysis. I'll be updating this with better information. Looks like one of the strap-on boosters likely collided with the core stage during separation. They did keep the LES tower on but did not use it... Will gather more details and better sources, then update the answer.
– Ghedipunk
53 mins ago
add a comment |Â
up vote
5
down vote
No, the Launch Escape System was not used.
The announcer was basing their reporting based on canned telemetry, and did not realize what was going on until after the canned telemetry showed the first stage separation.
These details are still developing, but it appears that during the separation of the strap-on boosters, one of the boosters hit the core stage.
It is a tradition for Soyuz rockets to include a plush toy suspended above the crew on an elastic cord as a quick-and-dirty G-force indicator. About 2 minutes 40 seconds into the video that NASA released of the launch (link to YouTube), during the booster separation, we see an internal shot of the capsule where the toy is suspended to about 3 Gs, then instead of going to just 1.5 Gs as expected, it becomes weightless and the internal cameras glitch out, likely due to the directional antenna not being aligned properly any more.
Next we see the strap-on boosters flying away asymmetrically, instead of the usual Korolev Cross, we see 3 boosters tumble away, signs of heavy debris, and the exhaust from the core stage is very asymmetrical.
The video then goes on to show the canned telemetry, but we can hear the translator quietly in the background giving details about loss of thrust as they translate the crew's broadcasts.
The LES tower was not jettisoned, but also was not used. This is likely because there was no debris to escape from due to still being well within the atmosphere, and no explosion to forcefully shove debris towards the crew. Without immediate danger to the crew, there was no need to subject them to the 14 Gs of acceleration that the Soyuz LES tower produces.
The crew would have performed an emergency separation from the rocket, which consists of detaching the Service Module from the third stage and jettisoning both the LES tower and fairing at the same time, firing the Service Module's engines momentarily to get away from the rocket, then detaching the Entry Module from the Orbital Module and Service Module. Aerodynamic drag would further separate the Entry Module from the rest of the spacecraft.
Scott Manley produced a video further highlighting details of the abort, where I get some additional information from.
answered 1 hour ago
Ghedipunk
26016
I'm not sure this is entirely right - I think the failure occurred after the tower jettison (as you state), but before core stage shutdown. Here's a typical flight profile with core shutdown around +4:45. SpaceflightNow suggests the failure was around +2 minutes.
– Jack
1 hour ago
@Jack I'm taking a closer look at the videos (using the longer version that NASA made available on their YouTube channel: youtube.com/watch?v=LUwnLFKfuBE )... So far I do hear the words "failure of the booster" at about t+165s from the translator, but the announcer acts like everything is nominal and the telemetry shows normal until they cut away shortly after the first stage ends.
– Ghedipunk
1 hour ago
Yeh I noticed that too, I guess maybe the broadcast telemetry isn't really designed to handle this sort of situation? I suspect we'll only get a detailed timeline until after the investigation, but we can be pretty certain it was after the tower jettison
– Jack
57 mins ago
2
Yeah, Scott Manley just posted an analysis. I'll be updating this with better information. Looks like one of the strap-on boosters likely collided with the core stage during separation. They did keep the LES tower on but did not use it... Will gather more details and better sources, then update the answer.
– Ghedipunk
53 mins ago
add a comment |Â
up vote
5
down vote
up vote
5
down vote
No, the Launch Escape System was not used.
The announcer was basing their reporting based on canned telemetry, and did not realize what was going on until after the canned telemetry showed the first stage separation.
These details are still developing, but it appears that during the separation of the strap-on boosters, one of the boosters hit the core stage.
It is a tradition for Soyuz rockets to include a plush toy suspended above the crew on an elastic cord as a quick-and-dirty G-force indicator. About 2 minutes 40 seconds into the video that NASA released of the launch (link to YouTube), during the booster separation, we see an internal shot of the capsule where the toy is suspended to about 3 Gs, then instead of going to just 1.5 Gs as expected, it becomes weightless and the internal cameras glitch out, likely due to the directional antenna not being aligned properly any more.
Next we see the strap-on boosters flying away asymmetrically, instead of the usual Korolev Cross, we see 3 boosters tumble away, signs of heavy debris, and the exhaust from the core stage is very asymmetrical.
The video then goes on to show the canned telemetry, but we can hear the translator quietly in the background giving details about loss of thrust as they translate the crew's broadcasts.
The LES tower was not jettisoned, but also was not used. This is likely because there was no debris to escape from due to still being well within the atmosphere, and no explosion to forcefully shove debris towards the crew. Without immediate danger to the crew, there was no need to subject them to the 14 Gs of acceleration that the Soyuz LES tower produces.
The crew would have performed an emergency separation from the rocket, which consists of detaching the Service Module from the third stage and jettisoning both the LES tower and fairing at the same time, firing the Service Module's engines momentarily to get away from the rocket, then detaching the Entry Module from the Orbital Module and Service Module. Aerodynamic drag would further separate the Entry Module from the rest of the spacecraft.
Scott Manley produced a video further highlighting details of the abort, where I get some additional information from.
answered 1 hour ago
Ghedipunk
26016
No, the Launch Escape System was not used.
The announcer was basing their reporting based on canned telemetry, and did not realize what was going on until after the canned telemetry showed the first stage separation.
These details are still developing, but it appears that during the separation of the strap-on boosters, one of the boosters hit the core stage.
It is a tradition for Soyuz rockets to include a plush toy suspended above the crew on an elastic cord as a quick-and-dirty G-force indicator. About 2 minutes 40 seconds into the video that NASA released of the launch (link to YouTube), during the booster separation, we see an internal shot of the capsule where the toy is suspended to about 3 Gs, then instead of going to just 1.5 Gs as expected, it becomes weightless and the internal cameras glitch out, likely due to the directional antenna not being aligned properly any more.
Next we see the strap-on boosters flying away asymmetrically, instead of the usual Korolev Cross, we see 3 boosters tumble away, signs of heavy debris, and the exhaust from the core stage is very asymmetrical.
The video then goes on to show the canned telemetry, but we can hear the translator quietly in the background giving details about loss of thrust as they translate the crew's broadcasts.
The LES tower was not jettisoned, but also was not used. This is likely because there was no debris to escape from due to still being well within the atmosphere, and no explosion to forcefully shove debris towards the crew. Without immediate danger to the crew, there was no need to subject them to the 14 Gs of acceleration that the Soyuz LES tower produces.
The crew would have performed an emergency separation from the rocket, which consists of detaching the Service Module from the third stage and jettisoning both the LES tower and fairing at the same time, firing the Service Module's engines momentarily to get away from the rocket, then detaching the Entry Module from the Orbital Module and Service Module. Aerodynamic drag would further separate the Entry Module from the rest of the spacecraft.
Scott Manley produced a video further highlighting details of the abort, where I get some additional information from.
answered 1 hour ago
Ghedipunk
26016
edited 13 mins ago
answered 1 hour ago
Ghedipunk
26016
answered 1 hour ago
Ghedipunk
26016
answered 1 hour ago
Ghedipunk
26016
26016
I'm not sure this is entirely right - I think the failure occurred after the tower jettison (as you state), but before core stage shutdown. Here's a typical flight profile with core shutdown around +4:45. SpaceflightNow suggests the failure was around +2 minutes.
– Jack
1 hour ago
@Jack I'm taking a closer look at the videos (using the longer version that NASA made available on their YouTube channel: youtube.com/watch?v=LUwnLFKfuBE )... So far I do hear the words "failure of the booster" at about t+165s from the translator, but the announcer acts like everything is nominal and the telemetry shows normal until they cut away shortly after the first stage ends.
– Ghedipunk
1 hour ago
Yeh I noticed that too, I guess maybe the broadcast telemetry isn't really designed to handle this sort of situation? I suspect we'll only get a detailed timeline until after the investigation, but we can be pretty certain it was after the tower jettison
– Jack
57 mins ago
2
Yeah, Scott Manley just posted an analysis. I'll be updating this with better information. Looks like one of the strap-on boosters likely collided with the core stage during separation. They did keep the LES tower on but did not use it... Will gather more details and better sources, then update the answer.
– Ghedipunk
53 mins ago
add a comment |Â
I'm not sure this is entirely right - I think the failure occurred after the tower jettison (as you state), but before core stage shutdown. Here's a typical flight profile with core shutdown around +4:45. SpaceflightNow suggests the failure was around +2 minutes.
– Jack
1 hour ago
@Jack I'm taking a closer look at the videos (using the longer version that NASA made available on their YouTube channel: youtube.com/watch?v=LUwnLFKfuBE )... So far I do hear the words "failure of the booster" at about t+165s from the translator, but the announcer acts like everything is nominal and the telemetry shows normal until they cut away shortly after the first stage ends.
– Ghedipunk
1 hour ago
Yeh I noticed that too, I guess maybe the broadcast telemetry isn't really designed to handle this sort of situation? I suspect we'll only get a detailed timeline until after the investigation, but we can be pretty certain it was after the tower jettison
– Jack
57 mins ago
2
Yeah, Scott Manley just posted an analysis. I'll be updating this with better information. Looks like one of the strap-on boosters likely collided with the core stage during separation. They did keep the LES tower on but did not use it... Will gather more details and better sources, then update the answer.
– Ghedipunk
53 mins ago
I'm not sure this is entirely right - I think the failure occurred after the tower jettison (as you state), but before core stage shutdown. Here's a typical flight profile with core shutdown around +4:45. SpaceflightNow suggests the failure was around +2 minutes.
– Jack
1 hour ago
I'm not sure this is entirely right - I think the failure occurred after the tower jettison (as you state), but before core stage shutdown. Here's a typical flight profile with core shutdown around +4:45. SpaceflightNow suggests the failure was around +2 minutes.
– Jack
1 hour ago
@Jack I'm taking a closer look at the videos (using the longer version that NASA made available on their YouTube channel: youtube.com/watch?v=LUwnLFKfuBE )... So far I do hear the words "failure of the booster" at about t+165s from the translator, but the announcer acts like everything is nominal and the telemetry shows normal until they cut away shortly after the first stage ends.
– Ghedipunk
1 hour ago
@Jack I'm taking a closer look at the videos (using the longer version that NASA made available on their YouTube channel: youtube.com/watch?v=LUwnLFKfuBE )... So far I do hear the words "failure of the booster" at about t+165s from the translator, but the announcer acts like everything is nominal and the telemetry shows normal until they cut away shortly after the first stage ends.
– Ghedipunk
1 hour ago
Yeh I noticed that too, I guess maybe the broadcast telemetry isn't really designed to handle this sort of situation? I suspect we'll only get a detailed timeline until after the investigation, but we can be pretty certain it was after the tower jettison
– Jack
57 mins ago
Yeh I noticed that too, I guess maybe the broadcast telemetry isn't really designed to handle this sort of situation? I suspect we'll only get a detailed timeline until after the investigation, but we can be pretty certain it was after the tower jettison
– Jack
57 mins ago
2
2
Yeah, Scott Manley just posted an analysis. I'll be updating this with better information. Looks like one of the strap-on boosters likely collided with the core stage during separation. They did keep the LES tower on but did not use it... Will gather more details and better sources, then update the answer.
– Ghedipunk
53 mins ago
Yeah, Scott Manley just posted an analysis. I'll be updating this with better information. Looks like one of the strap-on boosters likely collided with the core stage during separation. They did keep the LES tower on but did not use it... Will gather more details and better sources, then update the answer.
– Ghedipunk
53 mins ago
add a comment |Â
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