Author Topic: SLS General Discussion Thread 2  (Read 226127 times)

Offline OV135

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Re: SLS General Discussion Thread 2
« Reply #1060 on: 08/04/2017 11:43 PM »
Regarding the heater strips that go on the SRBs. How would these look on the 5 segment SRB? I'm kind of stuck seeing how this would look. Is there a diagram?

Offline Jim

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Re: SLS General Discussion Thread 2
« Reply #1061 on: 08/05/2017 01:10 AM »
Regarding the heater strips that go on the SRBs. How would these look on the 5 segment SRB? I'm kind of stuck seeing how this would look. Is there a diagram?

The same as four with an additional segment.  The heater strips are just on the field joints

Offline OV135

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Re: SLS General Discussion Thread 2
« Reply #1062 on: 08/05/2017 03:36 PM »
I see. Though which segment will be the added fifth? This helps to show which of the field joint heaters to duplicate.  They vary per segment.

Offline Jim

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Re: SLS General Discussion Thread 2
« Reply #1063 on: 08/05/2017 03:37 PM »
New center

Offline llanitedave

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Re: SLS General Discussion Thread 2
« Reply #1064 on: 08/07/2017 08:51 PM »
If needed, the swoosh patterns could also be used for tracking rotation and alignment.  There's no law that says the patterns have to be rectilinear.
"I've just abducted an alien -- now what?"

Offline SWGlassPit

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Re: SLS General Discussion Thread 2
« Reply #1065 on: 08/09/2017 08:21 PM »
If needed, the swoosh patterns could also be used for tracking rotation and alignment.  There's no law that says the patterns have to be rectilinear.

You're not going to get good data that way.  Not enough detail to pin down specific points.

Offline Ben the Space Brit

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Re: SLS General Discussion Thread 2
« Reply #1066 on: 08/24/2017 12:33 PM »
I remember being shouted at on another site for claiming that NASA wanted the old Saturn-V-style markings on the core for photographic tracking purposes. The sense of vindication is... somewhat bizarre to experience.
"Oops! I left the silly thing in reverse!" - Duck Dodgers

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The time for words has passed; The time has come to put up or shut up!
DON'T PROPAGANDISE, FLY!!!

Offline GWH

Re: SLS General Discussion Thread 2
« Reply #1067 on: 08/24/2017 04:07 PM »
If needed, the swoosh patterns could also be used for tracking rotation and alignment.  There's no law that says the patterns have to be rectilinear.

You're not going to get good data that way.  Not enough detail to pin down specific points.

Thing is the swooshes could still stay if they built in the checkers as part of the design, for example this photo I found on google (Ironically it is named "checkered swoosh Rocket Pop").

The change to remove the swooshes annoys me considerably.  I live in the engineering world, but am very aware of the importance of aesthetics, particularly for publicly funded programs.  In the case of the swooshes there is no reason why they cannot remain in a modified form, it just takes a slight merging of engineering and artistic vision.

EDIT: With the updated animation out today, UGH the checkers look even worse than I could have thought.  Attached is my MS Paint drawn checkered stripe image of SLS, done with an appalling poor level of quality and low levels of effort (as evident by the complete lack of symmetry). 
« Last Edit: 08/30/2017 03:30 PM by GWH »

Offline OV135

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Re: SLS General Discussion Thread 2
« Reply #1068 on: 08/31/2017 09:23 PM »
I've noticed none of the SLS diagrams and art show both sides of the stack.In some I see the large system tunnel on the core stage, but see it in none of the illustrations of the side of SLS facing it's LUT. I only see the other side via other diagrams or the 1/10 scale models.

By the way, what color is the system tunnel? Is it the same lighter color as the intertank and close out areas or is it the same color as the acreage foam spray, which is darker? I'm building a 1/72 scale model of this and the side in question has no reference to look for. I've tried and all diagrams show only the side facing away from the LUT.

Online Lars-J

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Re: SLS General Discussion Thread 2
« Reply #1069 on: 08/31/2017 09:50 PM »
From the UPDATE thread:

Dynetics has announced the completion of the SLS core stage pathfinder vehicle.

http://www.dynetics.com/news/497

If they completed it, why don't they share a photo of it, instead of this rendering? (click on the update post to see the rendering)

Offline rayleighscatter

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Re: SLS General Discussion Thread 2
« Reply #1070 on: 09/02/2017 01:09 PM »
From the UPDATE thread:

Dynetics has announced the completion of the SLS core stage pathfinder vehicle.

http://www.dynetics.com/news/497

If they completed it, why don't they share a photo of it, instead of this rendering? (click on the update post to see the rendering)

Yeah, that struck me as a bit odd as well. Here's some pictures from the media and NASA.


Offline OV135

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Re: SLS General Discussion Thread 2
« Reply #1071 on: 09/02/2017 10:34 PM »
Will it be painted to look like the flight article?

Offline woods170

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Re: SLS General Discussion Thread 2
« Reply #1072 on: 09/03/2017 02:26 PM »
Will it be painted to look like the flight article?
No. What you see is the finished product: Painted grey. It's sole purpose is being a dimensional- and mass simulator of the core stage. Flight-article "looks" are not required.


Edit: spelling
« Last Edit: 09/03/2017 05:00 PM by woods170 »

Offline RonM

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Re: SLS General Discussion Thread 2
« Reply #1073 on: 09/06/2017 04:55 AM »
Great article, but lacking proper metric units. Don't want to alienate the rest of the world!
Isn't SLS being built using Imperial units?  If so, the most precise numbers will be in those units.

 - Ed Kyle
US Imperial Units is primary measurement and Metric is listed as secondary per Space Launch System (SLS) Mission Planner's Guide - ESD 30000 Baseline. PSM most charts are hybrid.

Sorry about being pedantic, but the US doesn't used Imperial units. We use US Customary units. They are mostly the same, but with some important differences.

https://en.wikipedia.org/wiki/Comparison_of_the_imperial_and_US_customary_measurement_systems

I wished we used the metric system, it's a lot simpler when you get used to it.
document says US Imperial Units so that is what we are going to just roll with the flow. Discussion thread here: http://forum.nasaspaceflight.com/index.php?topic=38021.0

That's sad. It doesn't say US Imperial units (the word Imperial doesn't appear in the document), but it does say English units. Even our engineers don't understand what units we use. Doesn't matter with length, but a US gallon (fluid or dry) is smaller than an Imperial gallon and let's not forget the confusion about tons. More reasons for at least the government to go metric.

Offline Welsh Dragon

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Re: SLS General Discussion Thread 2
« Reply #1074 on: 09/06/2017 07:31 AM »
Oh of course the 'native' units (not wanting to get into name discussion) should be first, just think metric conversions should be mentioned too.

Offline Khadgars

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Re: SLS General Discussion Thread 2
« Reply #1075 on: 09/06/2017 03:57 PM »
Oh of course the 'native' units (not wanting to get into name discussion) should be first, just think metric conversions should be mentioned too.

Is it common practice for European sites to convert to Imperial units?  Just curious.

Offline Welsh Dragon

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Re: SLS General Discussion Thread 2
« Reply #1076 on: 09/06/2017 04:52 PM »
Getting very off topic here, but no, not at all (barring the UK of course, which is a special case). Which is understandable, given that they write in the majority system, so to speak.

Offline Star One

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Re: SLS General Discussion Thread 2
« Reply #1077 on: 10/25/2017 08:04 PM »
Quote
Jeff Foust
@jeff_foust
Honeycutt: SLS will be the backbone for US space plans for 30 years or more. #VonBraun

https://mobile.twitter.com/jeff_foust/status/923203278485229569

Quote
Jeff Foust
@jeff_foust
Mike Griffin: donít expect to see changes on the scale of 2010 (when Constellation cancelled.) SLS and Orion arenít going away. #VonBraun

https://mobile.twitter.com/jeff_foust/status/923214927187382273
« Last Edit: 10/25/2017 08:06 PM by Star One »

Offline Star One

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Re: SLS General Discussion Thread 2
« Reply #1078 on: 10/26/2017 04:38 PM »
Decision on EM-1 launch date still pending

Quote
HUNTSVILLE, Ala. ó NASA is still up to a month away from setting a new target launch date for the first flight of the Space Launch System, but agency officials said they still expected it to take place in 2019.

NASA has not set a new date for Exploration Mission (EM) 1, which will launch an uncrewed Orion spacecraft on a test flight into lunar orbit and back, since announcing in May that it would delay the flight to 2019 after deciding not to put a crew on the mission.

http://spacenews.com/decision-on-em-1-launch-date-still-pending/

Offline spacetraveler

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Re: SLS General Discussion Thread 2
« Reply #1079 on: 11/09/2017 03:06 AM »
Let's face it, there's pretty much a zero percent chance that it doesn't slip into 2020.

The most optimistic scenarios are continually projected publicly because SLS needs all the political support it can get if it's going to survive.

I'd bank on a Q3 or later launch in 2020 at this point.
« Last Edit: 11/09/2017 03:11 AM by spacetraveler »

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