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NASA's RS-25 Engines
What should a Discovery Program mission budget look like?What are the costs of the various different engines in current use?How did they solve Saturn V pogo oscillation problems?Nasa's Orion program doesn't make senseHow will the SLS first stage be supplied with engines? Copy manufacturing the RS-25 or replacing it?Are cold gas thrusters viable for model rockets?How is chamber pressure and temperature determined for cold gas thrusters?What does this paper say is wrong (quantitatively and procedurally) with WISE & NeoWISE asteroid data?Where can I read further on the specs the South Korean engine for next month's sub-orbital test?How will the Gateway-before-boots sequence benefit US business, economic and technological development?
$begingroup$
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 2 hours ago
Organic Marble
58.2k3159249
asked 3 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.
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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 2 hours ago
Organic Marble
58.2k3159249
asked 3 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 2 hours ago
Organic Marble
58.2k3159249
asked 3 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 2 hours ago
Organic Marble
58.2k3159249
asked 3 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 2 hours ago
Organic Marble
58.2k3159249
asked 3 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 2 hours ago
Organic Marble
58.2k3159249
edited 2 hours ago
Organic Marble
58.2k3159249
edited 2 hours ago
Organic Marble
58.2k3159249
58.2k3159249
asked 3 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 3 hours ago
Mitch99Mitch99
254
asked 3 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
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oldest
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$begingroup$
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 2 hours ago
Organic MarbleOrganic Marble
58.2k3159249
$endgroup$
$begingroup$
Awesome! Exactly what I was looking for! Thank you!
$endgroup$
– Mitch99
47 mins 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
45 mins ago
$begingroup$
Got it, thanks!!
$endgroup$
– Mitch99
16 mins 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
7 mins 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
4 mins ago
add a comment |
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1 Answer
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1 Answer
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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 2 hours ago
Organic MarbleOrganic Marble
58.2k3159249
$endgroup$
$begingroup$
Awesome! Exactly what I was looking for! Thank you!
$endgroup$
– Mitch99
47 mins 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
45 mins ago
$begingroup$
Got it, thanks!!
$endgroup$
– Mitch99
16 mins 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
7 mins 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
4 mins ago
add a comment |
$begingroup$
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 2 hours ago
Organic MarbleOrganic Marble
58.2k3159249
$endgroup$
$begingroup$
Awesome! Exactly what I was looking for! Thank you!
$endgroup$
– Mitch99
47 mins 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
45 mins ago
$begingroup$
Got it, thanks!!
$endgroup$
– Mitch99
16 mins 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
7 mins 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
4 mins ago
add a comment |
$begingroup$
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 2 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 2 hours ago
Organic MarbleOrganic Marble
58.2k3159249
edited 1 hour ago
answered 2 hours ago
Organic MarbleOrganic Marble
58.2k3159249
answered 2 hours ago
Organic MarbleOrganic Marble
58.2k3159249
answered 2 hours ago
Organic MarbleOrganic Marble
58.2k3159249
58.2k3159249
$begingroup$
Awesome! Exactly what I was looking for! Thank you!
$endgroup$
– Mitch99
47 mins 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
45 mins ago
$begingroup$
Got it, thanks!!
$endgroup$
– Mitch99
16 mins 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
7 mins 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
4 mins ago
add a comment |
$begingroup$
Awesome! Exactly what I was looking for! Thank you!
$endgroup$
– Mitch99
47 mins 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
45 mins ago
$begingroup$
Got it, thanks!!
$endgroup$
– Mitch99
16 mins 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
7 mins 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
4 mins ago
$begingroup$
Awesome! Exactly what I was looking for! Thank you!
$endgroup$
– Mitch99
47 mins ago
$begingroup$
Awesome! Exactly what I was looking for! Thank you!
$endgroup$
– Mitch99
47 mins 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
45 mins 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
45 mins ago
$begingroup$
Got it, thanks!!
$endgroup$
– Mitch99
16 mins ago
$begingroup$
Got it, thanks!!
$endgroup$
– Mitch99
16 mins 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
7 mins 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
7 mins 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
4 mins 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
4 mins ago
add a comment |
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.
Mitch99 is a new contributor. Be nice, and check out our Code of Conduct.
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