Author Topic: SpaceX COTS Demo 1 Updates  (Read 651003 times)

Offline Jim

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Re: COTS Demo 1
« Reply #260 on: 09/21/2010 02:58 am »

Delta II's usually have solids. You cannot do hot fire tests with solids. Even most EELV launches I can remember had some solids.


Yes you can.  How do you think the shuttle did it?  The Delta IV did it with solids

Online yg1968

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Re: COTS Demo 1
« Reply #261 on: 09/21/2010 05:22 am »
That PDF does not seem to be the document you are referring to. Or perhaps I am confused.

Quote
(see page 5 of the document -which is page 7 of the PDF, see also the index on page 1 -which is page 3 of the PDF)

Wow... that has to be the most byzantine page reference into a PDF document I have seen - I certainly canot make sense of it ??? 
EDIT: Ok I think I found it. But it is still not very conclusive, since the document is lacking context.

The contract line items have been redacted which makes it hard to read. But page 7 of the PDF is where it mentions that it is an option.
« Last Edit: 09/21/2010 02:07 pm by yg1968 »

Offline tobi453

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Re: COTS Demo 1
« Reply #262 on: 09/22/2010 10:03 pm »

Offline douglas100

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Re: COTS Demo 1
« Reply #263 on: 09/22/2010 11:09 pm »
Looks like Jim got it right again! :)
Douglas Clark

Offline robertross

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Re: COTS Demo 1
« Reply #264 on: 09/22/2010 11:30 pm »
Looks like Jim got it right again! :)

surprise, surprise  :)

Offline sdsds

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Re: COTS Demo 1
« Reply #265 on: 09/23/2010 12:43 am »
On the static fire question, is there the possibility that not all the same people will be sitting in the launch control center who sat in those seats during the previous launch?  Giving newcomers first-hand experience of the count all the way to ignition could be reason enough for a static fire test.  The biggest "software" errors sometimes originate from the other side of the keyboard.
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Offline Antares

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Re: COTS Demo 1
« Reply #266 on: 09/23/2010 03:39 am »
Doubtful.  And, any launch team worth its salt would have done enough sims that they wouldn't need any more practice prior to risking flight hardware.
If I like something on NSF, it's probably because I know it to be accurate.  Every once in a while, it's just something I agree with.  Facts generally receive the former.

Offline dbooker

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Re: COTS Demo 1
« Reply #267 on: 09/23/2010 03:35 pm »
Couple questions.
1. Is re-entry/return part of the SpaceX COTS 1 Demo flight?
2. Anyone know if the 1st Dragon test article is still in orbit?  If so anyone know when it is projected to re-enter the atmosphere?

Offline Jim

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Re: COTS Demo 1
« Reply #268 on: 09/23/2010 03:36 pm »
Also, a WDR provides this experience too

Offline Lars_J

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Re: COTS Demo 1
« Reply #269 on: 09/23/2010 03:45 pm »
Couple questions.
1. Is re-entry/return part of the SpaceX COTS 1 Demo flight?

Yes.

2. Anyone know if the 1st Dragon test article is still in orbit?  If so anyone know when it is projected to re-enter the atmosphere?

It is no longer in orbit. According to this WIKI page, re-entry occured "around 0050 GMT on June 27, 2010": http://en.wikipedia.org/wiki/Dragon_Spacecraft_Qualification_Unit
« Last Edit: 09/23/2010 03:45 pm by Lars_J »

Offline AnalogMan

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Re: COTS Demo 1
« Reply #270 on: 09/23/2010 04:08 pm »
1. Is re-entry/return part of the SpaceX COTS 1 Demo flight?

This is what SpaceX put in their document to NASA:

"Demo 1 - Core Functionality Flight.

The first flight of Dragon is intended to demonstrate core functionality, such as on orbit maneuvering, structural integrity, systems functions and entry/descent/landing. Note, the spacecraft will be highly instrumented, with multi-megabit telemetry and video on all missions."
« Last Edit: 09/23/2010 04:09 pm by AnalogMan »

Offline Salo

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Re: COTS Demo 1
« Reply #271 on: 09/24/2010 09:48 am »
http://www.spacenews.com/launch/100922-spacex-targets-november-dragon.html
Quote
WASHINGTON — Hawthorne, Calif.-based Space Exploration Technologies (SpaceX) has shifted a planned Oct. 23 launch of its Falcon 9 rocket and Dragon cargo vessel to November.

    “Our targeted launch date is moving — we’ve submitted a request for November 8th or 9th and are waiting for the range to complete their standard deconfliction work and provide a formal approval,” SpaceX spokeswoman Kirstin Brost said in a Sept. 21 e-mail.

Offline corrodedNut

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Re: COTS Demo 1
« Reply #272 on: 09/29/2010 08:34 pm »
New SpaceRef article:

http://www.spaceref.com/news/viewnews.html?id=1447

New photos, including one of the WDR
« Last Edit: 09/29/2010 08:34 pm by corrodedNut »

Offline Comga

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Re: COTS Demo 1
« Reply #273 on: 09/30/2010 05:02 am »
New SpaceRef article:
http://www.spaceref.com/news/viewnews.html?id=1447
New photos, including one of the WDR

Nice photos indeed but the article has many errors and silliness.
Comets don't flame.
The delay will "allow SpaceX personal (sic) additional time".  Uh, yeah
At this time all American launch pads are "sea side". SLC-40 is no different.
Falcon 9 isn't really "EELV class", which is no criticism.
Dragon will be berthed, not docked.
We know the author was an "invited" "eye witness", but it's not about him.

But I digress...

The Draco engines are again shown covered with those white caps and not flush to the outer surface.  That is still a curiosity.

The tear-out covers for the parachute shrouds are nearly flush, which is what one would suspect, but what is that other red line near the top?  For the drop test the three shroud lines converged at the top of the Dragon pressurized volume.  This potentially fourth line goes somewhere else, and it is definitely not flush.  Any ideas on this?

Looks like gloving around the Merlin engines.  Have we seen this before?

And this was the first post in five days for a launch in six weeks.  How can there be so little to discuss?

(Removed eroneous overcritical remark)
« Last Edit: 09/30/2010 04:46 pm by Comga »
What kind of wastrels would dump a perfectly good booster in the ocean after just one use?

Offline Lars_J

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Re: COTS Demo 1
« Reply #274 on: 09/30/2010 05:20 am »
New SpaceRef article:
http://www.spaceref.com/news/viewnews.html?id=1447
New photos, including one of the WDR
The Draco engines are again shown covered with those white caps and not flush to the outer surface.  That is still a curiosity.

It looks like these pictures were taken in the middle of installing external insulation on the service section around the Draco's. (note the partial thin while liner near the heatshield which does not extend all around, only the bottom half, in this image: http://images.spaceref.com/news/2010/IMG_8368_KenKremer.jpg)

I'm guessing the remaining dark areas will receive custom-cut insulation to make everything near flush. This way the Draco covers will become flush with the surface around them. The center of the thrusters also look like a similar material that covers the Shuttle thrusters at launch, which is made to pop out at first thruster usage. Or they are just temporary protective covers.

Quote
The tear-out covers for the parachute shrouds are nearly flush, which is what one would suspect, but what is that other red line near the top?  For the drop test the three shroud lines converged at the top of the Dragon pressurized volume.  This potentially fourth line goes somewhere else, and it is definitely not flush.  Any ideas on this?

Could it be drogue-related? Or perhaps some trigger mechanism for releasing the nose cone after 2nd stage ignition?

Quote
Looks like gloving around the Merlin engines.  Have we seen this before?

Do you mean the blue covers of the engine nozzle? Or the white insulation material at the engine base? The latter looks a little different that what was seen in the pictures before flight 1, although the pictures may not have been taken at the same stage:
F9 flight 1 base: http://images.spaceref.com/news/2010/oospaceximage001.jpg
F9 flight 2 base: http://images.spaceref.com/news/2010/IMG_8278_KenKremer_.jpg

Quote
And this was the first post in five days for a launch in six weeks.  How can there be so little to discuss?

There has been plenty of discussion - just not much to add, until we get pictures or news like this.  :)

Offline Comga

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Re: COTS Demo 1
« Reply #275 on: 09/30/2010 06:07 am »

]The tear-out covers for the parachute shrouds are nearly flush, which is what one would suspect, but what is that other red line near the top?  For the drop test the three shroud lines converged at the top of the Dragon pressurized volume.  This potentially fourth line goes somewhere else, and it is definitely not flush.  Any ideas on this?

Could it be drogue-related? Or perhaps some trigger mechanism for releasing the nose cone after 2nd stage ignition?

Quote
Looks like gloving around the Merlin engines.  Have we seen this before?

Do you mean the blue covers of the engine nozzle? Or the white insulation material at the engine base? The latter looks a little different that what was seen in the pictures before flight 1, although the pictures may not have been taken at the same stage:
F9 flight 1 base: http://images.spaceref.com/news/2010/oospaceximage001.jpg
F9 flight 2 base: http://images.spaceref.com/news/2010/IMG_8278_KenKremer_.jpg

No, it's not the drogues.  They come out of the middle of the three lines that meet at the top.  And I doubt that it has anything to do with the nosecone.

Yes, I meant the white fabric-like material around the engines above the bells.  It is different from any previous image.
What kind of wastrels would dump a perfectly good booster in the ocean after just one use?

Offline dunderwood

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Re: COTS Demo 1
« Reply #276 on: 09/30/2010 03:35 pm »
Quote
STS-133 is not the last Shuttle flight.

It is the last flight of Discovery, which is what the article notes. 

Offline renclod

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Re: COTS Demo 1
« Reply #277 on: 10/02/2010 08:32 pm »

No, it's not the drogues.  They come out of the middle of the three lines that meet at the top. 

I think the drogues (two) come out from left and right. Main parachutes (three) come out of the middle.

The "other red line near the top" which "is definitely not flush" could be a [cable] tray for development flight instrumentation (something that a production Dragon won't have). Who knows.


Offline spacetraveler

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Re: COTS Demo 1
« Reply #278 on: 10/02/2010 08:53 pm »
Falcon 9 isn't really "EELV class", which is no criticism.

The most often flown Atlas V is the 401 config, Falcon 9 has basically the same payload capacity to GTO.

It might not be as scalable as the EELVs yet (no F9H) but I would certainly consider it in their class.
« Last Edit: 10/02/2010 08:54 pm by spacetraveler »

Offline Ben the Space Brit

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Re: COTS Demo 1
« Reply #279 on: 10/03/2010 07:22 am »
Falcon 9 isn't really "EELV class", which is no criticism.

The most often flown Atlas V is the 401 config, Falcon 9 has basically the same payload capacity to GTO.

It might not be as scalable as the EELVs yet (no F9H) but I would certainly consider it in their class.

FWIW, I agree with Jim that the Falcon-9, in its current form, is a Delta-II-class launch vehicle.  The Raptor upper stage and possibly F-1e core derived LFB boosters might change that but that's off-topic for this thread.
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