NASA's RS-25 Engines
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I am developing a FSX-based space flight simulator FSX SpacePort. I've been trying to get the detailed specs on NASA's RS-25 engine, namely, what were the ramp-up times for this engine? As in, how long did it take from ignition to full thrust?
Thanks!
nasa engines sls ssme
edited 3 hours ago
Organic Marble
58.2k3159249
asked 5 hours ago
Mitch99Mitch99
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Mitch99 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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I am developing a FSX-based space flight simulator FSX SpacePort. I've been trying to get the detailed specs on NASA's RS-25 engine, namely, what were the ramp-up times for this engine? As in, how long did it take from ignition to full thrust?
Thanks!
nasa engines sls ssme
edited 3 hours ago
Organic Marble
58.2k3159249
asked 5 hours ago
Mitch99Mitch99
254
New contributor
Mitch99 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
I am developing a FSX-based space flight simulator FSX SpacePort. I've been trying to get the detailed specs on NASA's RS-25 engine, namely, what were the ramp-up times for this engine? As in, how long did it take from ignition to full thrust?
Thanks!
nasa engines sls ssme
edited 3 hours ago
Organic Marble
58.2k3159249
asked 5 hours ago
Mitch99Mitch99
254
New contributor
Mitch99 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
I am developing a FSX-based space flight simulator FSX SpacePort. I've been trying to get the detailed specs on NASA's RS-25 engine, namely, what were the ramp-up times for this engine? As in, how long did it take from ignition to full thrust?
Thanks!
nasa engines sls ssme
nasa engines sls ssme
edited 3 hours ago
Organic Marble
58.2k3159249
asked 5 hours ago
Mitch99Mitch99
254
New contributor
Mitch99 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 3 hours ago
Organic Marble
58.2k3159249
asked 5 hours ago
Mitch99Mitch99
254
New contributor
Mitch99 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 3 hours ago
Organic Marble
58.2k3159249
edited 3 hours ago
Organic Marble
58.2k3159249
edited 3 hours ago
Organic Marble
58.2k3159249
58.2k3159249
asked 5 hours ago
Mitch99Mitch99
254
New contributor
Mitch99 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 5 hours ago
Mitch99Mitch99
254
asked 5 hours ago
Mitch99Mitch99
254
254
New contributor
Mitch99 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Mitch99 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Mitch99 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
1 Answer
1
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oldest
votes
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A good assumption is that the startup sequence is very similar to the SSME. Here is some SSME startup data showing the time you asked about from the Rocketdyne Pocket Data Book. Eventually the SLS will be using RS-25Es which are somewhat different from the SSME, but my guess is that the start sequence won't change much if at all.
The hashed field is test experience, the solid lines are the ICD requirements.
answered 3 hours ago
Organic MarbleOrganic Marble
58.2k3159249
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$begingroup$
Awesome! Exactly what I was looking for! Thank you!
$endgroup$
– Mitch99
2 hours ago
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@Mitch99 Since you're new to the site: If this answer is what you were looking for, please mark it as correct by clicking the gray checkmark beside it. And upvote if you have a mind to.
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– Organic Marble
2 hours ago
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Got it, thanks!!
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– Mitch99
2 hours ago
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So - since it takes ~4 seconds to get them to 100% thrust, do they then ignite them at T -4:00 seconds, and they count T -0:00 the time all of them are roughly at 100%, the SRBs get lit, and it's a "mission start"?
$endgroup$
– Mitch99
1 hour ago
$begingroup$
I only know about shuttle, but there the start command was send at ~T-5 seconds, which gave time for the SSMEs to light, the "twang" to settle, and then the SRBs lit at, yes, T-0. SLS won't have the "twang" to deal with because its engines are axially mounted.
$endgroup$
– Organic Marble
1 hour ago
|
show 2 more comments
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1 Answer
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1 Answer
1
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oldest
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active
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votes
$begingroup$
A good assumption is that the startup sequence is very similar to the SSME. Here is some SSME startup data showing the time you asked about from the Rocketdyne Pocket Data Book. Eventually the SLS will be using RS-25Es which are somewhat different from the SSME, but my guess is that the start sequence won't change much if at all.
The hashed field is test experience, the solid lines are the ICD requirements.
answered 3 hours ago
Organic MarbleOrganic Marble
58.2k3159249
$endgroup$
$begingroup$
Awesome! Exactly what I was looking for! Thank you!
$endgroup$
– Mitch99
2 hours ago
$begingroup$
@Mitch99 Since you're new to the site: If this answer is what you were looking for, please mark it as correct by clicking the gray checkmark beside it. And upvote if you have a mind to.
$endgroup$
– Organic Marble
2 hours ago
$begingroup$
Got it, thanks!!
$endgroup$
– Mitch99
2 hours ago
$begingroup$
So - since it takes ~4 seconds to get them to 100% thrust, do they then ignite them at T -4:00 seconds, and they count T -0:00 the time all of them are roughly at 100%, the SRBs get lit, and it's a "mission start"?
$endgroup$
– Mitch99
1 hour ago
$begingroup$
I only know about shuttle, but there the start command was send at ~T-5 seconds, which gave time for the SSMEs to light, the "twang" to settle, and then the SRBs lit at, yes, T-0. SLS won't have the "twang" to deal with because its engines are axially mounted.
$endgroup$
– Organic Marble
1 hour ago
|
show 2 more comments
$begingroup$
A good assumption is that the startup sequence is very similar to the SSME. Here is some SSME startup data showing the time you asked about from the Rocketdyne Pocket Data Book. Eventually the SLS will be using RS-25Es which are somewhat different from the SSME, but my guess is that the start sequence won't change much if at all.
The hashed field is test experience, the solid lines are the ICD requirements.
answered 3 hours ago
Organic MarbleOrganic Marble
58.2k3159249
$endgroup$
$begingroup$
Awesome! Exactly what I was looking for! Thank you!
$endgroup$
– Mitch99
2 hours ago
$begingroup$
@Mitch99 Since you're new to the site: If this answer is what you were looking for, please mark it as correct by clicking the gray checkmark beside it. And upvote if you have a mind to.
$endgroup$
– Organic Marble
2 hours ago
$begingroup$
Got it, thanks!!
$endgroup$
– Mitch99
2 hours ago
$begingroup$
So - since it takes ~4 seconds to get them to 100% thrust, do they then ignite them at T -4:00 seconds, and they count T -0:00 the time all of them are roughly at 100%, the SRBs get lit, and it's a "mission start"?
$endgroup$
– Mitch99
1 hour ago
$begingroup$
I only know about shuttle, but there the start command was send at ~T-5 seconds, which gave time for the SSMEs to light, the "twang" to settle, and then the SRBs lit at, yes, T-0. SLS won't have the "twang" to deal with because its engines are axially mounted.
$endgroup$
– Organic Marble
1 hour ago
|
show 2 more comments
$begingroup$
A good assumption is that the startup sequence is very similar to the SSME. Here is some SSME startup data showing the time you asked about from the Rocketdyne Pocket Data Book. Eventually the SLS will be using RS-25Es which are somewhat different from the SSME, but my guess is that the start sequence won't change much if at all.
The hashed field is test experience, the solid lines are the ICD requirements.
answered 3 hours ago
Organic MarbleOrganic Marble
58.2k3159249
$endgroup$
A good assumption is that the startup sequence is very similar to the SSME. Here is some SSME startup data showing the time you asked about from the Rocketdyne Pocket Data Book. Eventually the SLS will be using RS-25Es which are somewhat different from the SSME, but my guess is that the start sequence won't change much if at all.
The hashed field is test experience, the solid lines are the ICD requirements.
answered 3 hours ago
Organic MarbleOrganic Marble
58.2k3159249
edited 3 hours ago
answered 3 hours ago
Organic MarbleOrganic Marble
58.2k3159249
answered 3 hours ago
Organic MarbleOrganic Marble
58.2k3159249
answered 3 hours ago
Organic MarbleOrganic Marble
58.2k3159249
58.2k3159249
$begingroup$
Awesome! Exactly what I was looking for! Thank you!
$endgroup$
– Mitch99
2 hours ago
$begingroup$
@Mitch99 Since you're new to the site: If this answer is what you were looking for, please mark it as correct by clicking the gray checkmark beside it. And upvote if you have a mind to.
$endgroup$
– Organic Marble
2 hours ago
$begingroup$
Got it, thanks!!
$endgroup$
– Mitch99
2 hours ago
$begingroup$
So - since it takes ~4 seconds to get them to 100% thrust, do they then ignite them at T -4:00 seconds, and they count T -0:00 the time all of them are roughly at 100%, the SRBs get lit, and it's a "mission start"?
$endgroup$
– Mitch99
1 hour ago
$begingroup$
I only know about shuttle, but there the start command was send at ~T-5 seconds, which gave time for the SSMEs to light, the "twang" to settle, and then the SRBs lit at, yes, T-0. SLS won't have the "twang" to deal with because its engines are axially mounted.
$endgroup$
– Organic Marble
1 hour ago
|
show 2 more comments
$begingroup$
Awesome! Exactly what I was looking for! Thank you!
$endgroup$
– Mitch99
2 hours ago
$begingroup$
@Mitch99 Since you're new to the site: If this answer is what you were looking for, please mark it as correct by clicking the gray checkmark beside it. And upvote if you have a mind to.
$endgroup$
– Organic Marble
2 hours ago
$begingroup$
Got it, thanks!!
$endgroup$
– Mitch99
2 hours ago
$begingroup$
So - since it takes ~4 seconds to get them to 100% thrust, do they then ignite them at T -4:00 seconds, and they count T -0:00 the time all of them are roughly at 100%, the SRBs get lit, and it's a "mission start"?
$endgroup$
– Mitch99
1 hour ago
$begingroup$
I only know about shuttle, but there the start command was send at ~T-5 seconds, which gave time for the SSMEs to light, the "twang" to settle, and then the SRBs lit at, yes, T-0. SLS won't have the "twang" to deal with because its engines are axially mounted.
$endgroup$
– Organic Marble
1 hour ago
$begingroup$
Awesome! Exactly what I was looking for! Thank you!
$endgroup$
– Mitch99
2 hours ago
$begingroup$
Awesome! Exactly what I was looking for! Thank you!
$endgroup$
– Mitch99
2 hours ago
$begingroup$
@Mitch99 Since you're new to the site: If this answer is what you were looking for, please mark it as correct by clicking the gray checkmark beside it. And upvote if you have a mind to.
$endgroup$
– Organic Marble
2 hours ago
$begingroup$
@Mitch99 Since you're new to the site: If this answer is what you were looking for, please mark it as correct by clicking the gray checkmark beside it. And upvote if you have a mind to.
$endgroup$
– Organic Marble
2 hours ago
$begingroup$
Got it, thanks!!
$endgroup$
– Mitch99
2 hours ago
$begingroup$
Got it, thanks!!
$endgroup$
– Mitch99
2 hours ago
$begingroup$
So - since it takes ~4 seconds to get them to 100% thrust, do they then ignite them at T -4:00 seconds, and they count T -0:00 the time all of them are roughly at 100%, the SRBs get lit, and it's a "mission start"?
$endgroup$
– Mitch99
1 hour ago
$begingroup$
So - since it takes ~4 seconds to get them to 100% thrust, do they then ignite them at T -4:00 seconds, and they count T -0:00 the time all of them are roughly at 100%, the SRBs get lit, and it's a "mission start"?
$endgroup$
– Mitch99
1 hour ago
$begingroup$
I only know about shuttle, but there the start command was send at ~T-5 seconds, which gave time for the SSMEs to light, the "twang" to settle, and then the SRBs lit at, yes, T-0. SLS won't have the "twang" to deal with because its engines are axially mounted.
$endgroup$
– Organic Marble
1 hour ago
$begingroup$
I only know about shuttle, but there the start command was send at ~T-5 seconds, which gave time for the SSMEs to light, the "twang" to settle, and then the SRBs lit at, yes, T-0. SLS won't have the "twang" to deal with because its engines are axially mounted.
$endgroup$
– Organic Marble
1 hour ago
|
show 2 more comments
Mitch99 is a new contributor. Be nice, and check out our Code of Conduct.
Mitch99 is a new contributor. Be nice, and check out our Code of Conduct.
Mitch99 is a new contributor. Be nice, and check out our Code of Conduct.
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