Author Topic: Ares I Development Thread  (Read 346400 times)

Offline Jim

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Re: Ares I Development Thread
« Reply #1320 on: 08/04/2017 01:39 PM »

J-2X is an essential engine for the SLS and manned-exploration programs,

Not true at all.  An assumption not supported by data.  J-2X is not needed for anything.
« Last Edit: 08/04/2017 01:40 PM by Jim »

Online TrevorMonty

Re: Ares I Development Thread
« Reply #1321 on: 08/04/2017 02:45 PM »
OA NGL will use BE3 as its US engine.

Unfortunately for J-2X it is never likely to fly.

Offline Propylox

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Re: Ares I Development Thread
« Reply #1322 on: 08/05/2017 03:40 PM »
Unfortunately for J-2X it is never likely to fly.
I was thinking the same thing about New Glenn, Vulcan and NGL which is why I asked about an Ares1 redux.

Offline Jim

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Re: Ares I Development Thread
« Reply #1323 on: 08/05/2017 03:49 PM »
Unfortunately for J-2X it is never likely to fly.
I was thinking the same thing about New Glenn, Vulcan and NGL which is why I asked about an Ares1 redux.

There is nothing that supports such thinking.  NG and Vulcan are flying.  If they don't fly, J-2X is certainly not going to fly.  Actually, there is no scenario where J-2X flies, especially since SLS is not going to last long.  There is even less chance of Ares I redux.  There is no case that supports NASA developing such a vehicle.
« Last Edit: 08/05/2017 03:53 PM by Jim »

Offline Patchouli

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Re: Ares I Development Thread
« Reply #1324 on: 08/07/2017 09:33 PM »


J-2X is an essential engine for the SLS and manned-exploration programs, thus I'm assuming its production and use as the 2nd-stage engine. I'm also assuming a 5m 2nd-stage based on the Delta IV, or Vulcan, or a redesign of the Delta IV with common bulkhead, or a knockoff from elsewhere ~ whatever.
Lastly, I'm using Antares' upper and orbital placement from prime contractor Orbital/ATK for GTO launches.



I'd say it's more of a nice have engine for some missions mostly ones needing the largest possible LEO payload vs absolutely necessary.
Though for those missions the simpler and cheaper to produce J-2S would be more desirable I'm surprised they didn't go this route with the J-2X after Ares I was canceled.
« Last Edit: 08/07/2017 09:35 PM by Patchouli »

Offline Propylox

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Re: Ares I Development Thread
« Reply #1325 on: 08/08/2017 04:09 AM »
I'd say it's more of a nice have engine for some missions mostly ones needing the largest possible LEO payload vs absolutely necessary.
Though for those missions the simpler and cheaper to produce J-2S would be more desirable I'm surprised they didn't go this route with the J-2X after Ares I was canceled.
It's not simply "large-to LEO", but delivers +40mT to the Moon in addition to +130mT to LEO without Advanced Boosters, or RS-25, and uses the same tooling as the core. I'd say that's "nice to have". Here's the +70mT single stage as well as two-stage core configuration. Discuss here;
Rocket https://forum.nasaspaceflight.com/index.php?topic=38069.msg1705330#msg1705330
Boattail https://forum.nasaspaceflight.com/index.php?topic=38069.msg1706197#msg1706197
« Last Edit: 08/08/2017 04:10 AM by Propylox »

Offline sdsds

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Re: Ares I Development Thread
« Reply #1326 on: 10/20/2017 08:22 AM »
October 20, 2009 (Eight years ago today.)
Ares I-X rolls out to launch pad 39B at Kennedy Space Center.
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Offline woods170

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Re: Ares I Development Thread
« Reply #1327 on: 10/20/2017 10:41 AM »
October 20, 2009 (Eight years ago today.)
Ares I-X rolls out to launch pad 39B at Kennedy Space Center.
Just when I figured everybody had forgotten about the stick....

Biggest model rocket ever...

Offline sdsds

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Re: Ares I Development Thread
« Reply #1328 on: 10/28/2017 08:10 PM »
And speaking of the big solids, can anyone say whether the swoopy stripes are still the plan of record for the SRB paint job?
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Offline IanThePineapple

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Re: Ares I Development Thread
« Reply #1329 on: 10/28/2017 08:26 PM »
And speaking of the big solids, can anyone say whether the swoopy stripes are still the plan of record for the SRB paint job?

Nope, they're blank now.
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Offline Hog

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Re: Ares I Development Thread
« Reply #1330 on: 10/28/2017 10:07 PM »
And speaking of the big solids, can anyone say whether the swoopy stripes are still the plan of record for the SRB paint job?

Nope, they're blank now.
They are?  They repainted the already poured SRB segments?
Paul

Offline IanThePineapple

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Re: Ares I Development Thread
« Reply #1331 on: 10/28/2017 10:19 PM »
And speaking of the big solids, can anyone say whether the swoopy stripes are still the plan of record for the SRB paint job?

Nope, they're blank now.
They are?  They repainted the already poured SRB segments?

They never were painted, they're plain white. The 'swooshes' were just to spice up the design in animations, similar to how the Falcon Heavy won't have the giant "S P A C E X" lettering going down its side, unlike the animation.
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Offline Hog

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Re: Ares I Development Thread
« Reply #1332 on: 10/30/2017 04:49 PM »

And speaking of the big solids, can anyone say whether the swoopy stripes are still the plan of record for the SRB paint job?

Nope, they're blank now.

They are?  They repainted the already poured SRB segments?

They never were painted, they're plain white. The 'swooshes' were just to spice up the design in animations, similar to how the Falcon Heavy won't have the giant "S P A C E X" lettering going down its side, unlike the animation.
I wasn't referencing any animations, but a real picture of one of the EM-1 segments.  I finally refound the picture again, and whatever is on the one side of this particular segment I mistook for a painted on graphic, I'm not really sure what is on its side, its not like the rest of the pure white segments
Thanks for the correction.
Paul

Offline whitelancer64

Re: Ares I Development Thread
« Reply #1333 on: 10/30/2017 05:00 PM »

And speaking of the big solids, can anyone say whether the swoopy stripes are still the plan of record for the SRB paint job?

Nope, they're blank now.

They are?  They repainted the already poured SRB segments?

They never were painted, they're plain white. The 'swooshes' were just to spice up the design in animations, similar to how the Falcon Heavy won't have the giant "S P A C E X" lettering going down its side, unlike the animation.
I wasn't referencing any animations, but a real picture of one of the EM-1 segments.  I finally refound the picture again, and whatever is on the one side of this particular segment I mistook for a painted on graphic, I'm not really sure what is on its side, its not like the rest of the pure white segments
Thanks for the correction.

The SLS SRBs will have photommetry markings on them.

https://www.nasa.gov/exploration/systems/sls/space-launch-system-solid-rocket-boosters-on-target-for-first-flight.html
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