Request Any SLS and Orion MPCV in development?

[gattispilot]

Here it shows as a separate part:
http://www.nasa.gov/pdf/664158main_sls_fs_master.pdf

But if it is attached I will just a new core mesh

 

[ISProgram]

I don't want to you to have to remesh the core stage, but I think the interstage remains attached to core stage. Many rocket have a interstage, which is technically a separate part, but remain on the first stage.

Also, the diagram points out the (Orion) Spacecraft Adapter which connects to the iCPS (and connects it to Orion), but in actual flight, it stays attached to the iCPS.

Saturn stages were the same way.

 

[RonDVouz]

There's actually an NSF article that gives some detail on Orion/SLS ascent.

For manned SLS flights, the ogive panels AND the launch escape tower will actually are jettisoned after booster seperation but before the iCPS separates and fires.

Not what the EFT-1 video shows. Fairings and escape tower are jettisoned after ICPS fires.

https://www.youtube.com/watch?v=MM8KwYlu_-Y

 

[Astro SG Wise]

From my understanding the SRB's will burn for 124 seconds, then the core stage will continue to burn for about another 8 or 9 minutes then the upper stage will separate and ignite its engine. The fairings and the launch escape tower jettison after the upper stage fires.

The constellation video kind of shows this sequence.

https://www.youtube.com/watch?v=bd-a__zQlJU

Basically.
1)Launch
2)SRB Sep
3)LEO achieved
4)Second Stage Sep
5)Fairing Sep*
6)LAS Sep*

*(Or LAS Sep before Fairing Sep)
The Interstage never separates. There is only the adapter. Second stage separates right from it.

---------- Post added at 08:38 PM ---------- Previous post was at 08:36 PM ----------

For Crew, Interstage stays. For the Cargo versions, it might separate from the first stage.

 

[ISProgram]

Not what the EFT-1 video shows. Fairings and escape tower are jettisoned after ICPS fires.

https://www.youtube.com/watch?v=MM8KwYlu_-Y

The NSF article mentions this discrepancy, and explains that while the video shows one thing, the ACTUAL documents that they apparently have access to for Orion/SLS say otherwise.

While videos have shown various ascent profile simulations, the accuracy can only be found in documentation, with the Con Ops overview providing the current plan.

“After SRB separation, but prior to ICPS separation, Orion will jettison the LAS (Launch Abort System) and SM (Service Module) panels,” the document notes, as opposed to this sequence occurring after Orion and the ICPS have separated from the Launch Vehicle Stage Adaptor (LVSA) on the SLS core.

 

[gattispilot]

I don't want to you to have to remesh the core stage, but I think the interstage remains attached to core stage. Many rocket have a interstage, which is technically a separate part, but remain on the first stage.

Also, the diagram points out the (Orion) Spacecraft Adapter which connects to the iCPS (and connects it to Orion), but in actual flight, it stays attached to the iCPS.

Saturn stages were the same way.

Actually it would easier to redo the core with the interstage attached and the Spacecraft adapter part of the ICPS.

---------- Post added at 04:56 PM ---------- Previous post was at 04:06 PM ----------

Redid both meshes. But get a CTD on seperation.

BEGIN_SHIPS
SLSICPS:Velcro\SLSICPS
  STATUS Landed Earth
  POS -80.6745292 28.5191812
  HEADING 0.00
  ATTACHED 2:0,slsCORE
  AFCMODE 7
  PRPLEVEL 0:1.000000
  NAVFREQ 0 0
  CONFIGURATION 0
  PRIMEBOOSTER 1
  CENTERTHRUST 0
  IGNITENEXT 0
  PADBIAS 1.000000
  CAMERA 0.000000 0.000000 75.000000
  TGT_HEADING 0.000000
END
slsCORE:Velcro\SLSCore2
  STATUS Landed Earth
  POS -80.6745292 28.5191812
  HEADING 0.00
  ATTACHED 2:0,slstower
  AFCMODE 7
  PRPLEVEL 0:1.000000 1:1.000000 2:1.000000
  NAVFREQ 0 0
  CONFIGURATION 0
  PRIMEBOOSTER 1
  CENTERTHRUST 0
  PADBIAS 1.000000
  CAMERA 0.000000 0.000000 90.000000
  SLA 1 0.50 0.00 -1.00
  TGT_HEADING 95.000000
  SERIESBURN 0 SLSICPS 0.0000 0.0000 -70 0.0000 0.0000 -1.0000 0.0000 1.0000 0.0000
END

in the config/vessel/velcro is the SLSICPS.cfg

; === Configuration file for vessel class Generic CVEL stage (Jasoncore) ===

Module = Velcro
Meshname = Velcro/SLSICPS
Size = 7.0

Mass = 11854 ; empty mass [kg]
MaxFuel = 107328 ; max fuel mass [kg]
Isp = 1381       ; fuel specific impulse [m/s]
IspSL = 1381

MaxMainThrust = 440000
MaxRetroThrust = 0
MaxHoverThrust = 0
MaxAttitudeThrust = 578
COG_OverGround = 4.0
CameraOffset = 0.0 0.0 15
CW = .2 .3 .7 .7
LiftFactor = 0.0
CrossSections = 205 205 15
RotResistance = 0.7 0.7 0.3
Touchdownpoints = 0 4.4 0  4.4 0 0  -4.4 0 0

; === Attachment specs ===
BEGIN_ATTACHMENT
C  0.0 0.0 3.228     0 0 1  0 1 0  VELCRO1
C  -1.22 0.0 0.0      0 0 1  1 0 0  VELCRO2
P  0.0 0.0 3.228     0 0 1  0 1 0  VELCRO3
P  -1.22 0.0 0.0      0 0 1  1 0 0  VELCRO4
END_ATTACHMENT


; === Engine reference points ===
ExhaustType = LH2
MEngineRef1 = 0 0 1

 

[RonDVouz]

So the core stage makes it all the way to LEO? I thought the core stage separated and the upper stage completed the orbit insertion, like an S-4b.

Then wouldn't the core stage have to burn a little to de-orbit?

 

[ISProgram]

Well, it's more accurate to say the core stage can make it to LEO without an upper stage. Early on, there was a "Block 0" configuration that could've done just that.

The DIRECT rockets could do it too, there's an addon somewhere that should demonstrate it nicely. The Jupiter-130 could've placed Orion into orbit.

As a matter of fact, the iCPS is considered part of the SLS payload. From here:

ICPS, considered part of the SLS payload rather than the vehicle itself, would be inserted with a 24,224 kg MPCV into a 1,800 x -93 km suborbital trajectory by SLS. The stage would then perform up to three burns to provide more than 3,050 m/s delta-V during its mission.

 

[gattispilot]

Close. Got the 2nd stage to fire. But I have 20 seconds upon firing the LAS ejects. It should have rockets. otherwise it goes thru the ship. and the 3 fairings don't come off. They should at 15 second

SLSICPS:Velcro\SLSICPS
  STATUS Landed Earth
  POS -80.6745292 28.5191812
  HEADING 0.00
  AFCMODE 7
  PRPLEVEL 0:1.000000
  NAVFREQ 0 0
  CONFIGURATION 0
  PRIMEBOOSTER 1
  CENTERTHRUST 0
  IGNITENEXT 0
  PADBIAS 1.000000
  CAMERA 0.000000 0.000000 75.000000
  TGT_HEADING 0.000000
  LES 15
  PAYLOAD Fair1 slsorionfair1 slsorionfair1 0.00 0.00 -69.50 0.00 0.00 1.00
  PAYLOAD Fair2 slsorionfair2 slsorionfair2 0.00 0.00 -69.50 0.00 0.00 1.00
  PAYLOAD Fair3 slsorionfair3 slsorionfair3 0.00 0.00 -69.50 0.00 0.00 1.00
  LES20 
  PAYLOAD Fair1 slsorionlas slsorionlas 0.00 0.00 -70.00 0.00 0.00 1.00
END
slsCORE:Velcro\SLSCore2
  STATUS Landed Earth
  POS -80.6745292 28.5191812
  HEADING 0.00
  ATTACHED 2:0,slstower
  AFCMODE 7
  PRPLEVEL 0:1.000000 1:1.000000 2:1.000000
  NAVFREQ 0 0
  CONFIGURATION 0
  PRIMEBOOSTER 1
  CENTERTHRUST 0
  PADBIAS 1.000000
  CAMERA 0.000000 0.000000 90.000000
  TGT_HEADING 95.000000
  SERIESBURN 0 SLSICPS 0.0000 0.0000 -70 0.0000 0.0000 -1.0000 0.0000 1.0000 0.0000
END

HAs any one gotten the cargo version to fly correctly.

---------- Post added 10-09-14 at 09:55 AM ---------- Previous post was 10-08-14 at 10:01 PM ----------

I am going to make the LAS as a vessel So once the core fuel is used up then the LAS will ignite and fly off. Then the ICPS will ignite and the panels come off.

BUt I was looking at that spaceport and saw this:
"Actual SLS Vehicles will not be Painted White."

So do I need to change the core?

 

[DaveS]

BUt I was looking at that spaceport and saw this:
"Actual SLS Vehicles will not be Painted White."

So do I need to change the core?

Yes. Straight orange on the propellant tanks as well as the intertank section. What will be painted though is the Engine Section and the Forward Skirt. Those will be coated with a white Super-Lightweight Ablator (SLA) for thermal protection during ascent.

 

[gattispilot]

So on the core orange on the tank sections and white on the front skirt and engine section.

Like this:
http://www.nasa.gov/pdf/756702main_SLS_Core_Stage.pdf

I guess I can do both textures for those who like.

On the forward skirt should it it be all white?

 

[RonDVouz]

BUt I was looking at that spaceport and saw this:
"Actual SLS Vehicles will not be Painted White."

So do I need to change the core?

Saves weight. The shuttle's external tank weighed 1,100 lbs more with the paint on it.

 

[DaveS]

Saves weight. The shuttle's external tank weighed 1,100 lbs more with the paint on it.

Actually weight saved by removing the Fire Retardant Latex (not paint) was only 595 lbs (269.535 kg). You might be thinking of the larger weight difference between the the Standard Weight ET(STS-1 through 5 and 7) and the Light Weight ET (Starting with STS-6) which was 10,300 lbs (4665.9 kg).

---------- Post added at 06:07 PM ---------- Previous post was at 06:03 PM ----------

So on the core orange on the tank sections and white on the front skirt and engine section.

Like this:
http://www.nasa.gov/pdf/756702main_SLS_Core_Stage.pdf

I guess I can do both textures for those who like.

On the forward skirt should it it be all white?

Yes, the FS will be all white. That's the SLA.

 

[RonDVouz]

I'm just recalling the numbers I heard about the weight difference between the first 6 tanks they used before switching to the unpainted tanks.

 

[DaveS]

I'm just recalling the numbers I heard about the weight difference between the first 6 tanks they used before switching to the unpainted tanks.

The first FRL-less ET was on STS-3.

 

[gattispilot]

So basically the texture will be white (ribbed) on top. No black strip.
Then orange and white on the engine section, right. Should there be those grey line to indicate the sections?

So how about those pipes on the outside?

 

[DaveS]

So basically the texture will be white (ribbed) on top. No black strip.
Then orange and white on the engine section, right. Should there be those grey line to indicate the sections?

So how about those pipes on the outside?

Foam. The entire CS will look like a longer version of the STS ET. My CS which is still WIP. There will be two 17" LOX feedlines (1/180°). One side will have the GOX and GH2 pressurization lines (2" OD) as well as a cable tray which has its design from the Delta IV EELV: http://www-pao.ksc.nasa.gov/images/large/2014-4178.jpg

 

[gattispilot]

Ok why is the one section a different color with ribbed area?

 

[DaveS]

Ok why is the one section a different color with ribbed area?

Different type of foam. The ribbed section is the intertank which separates the LH2 tank from the LOX tank. The ribs are actually called stringers. Here's a photo of the intertank of ET-137: http://www-pao.ksc.nasa.gov/images/large/2010-5945.jpg

 

[ISProgram]

I like white SLS. It looks so Saturn V. The picture below appears to show how the SLS will look with the EUS. Note that the EUS also is unpainted.