Author Topic: SpaceX Dragon 2 Pad Abort Test - May 6 2015 - DISCUSSION THREAD  (Read 1052659 times)

Offline Interstellar

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Dumb question: what does TEL stand for?

Transporter Erector Launcher

Offline Chris Bergin

No NET confirmed yet. No silly polls required (people are flapping their mouths on here so much they've forgot what this test is about and involves). ;)

Let's focus guys.
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Offline Razvan

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Yes. I read somewhere, a SpaceX official  statement, that the pad abort test is going to use a second stage mock-up.

Are you sure this was not about the in flight abort?
No. no. For the inflight abort you have to use all the gear, stage one, stge two, everything...
For the pad abort test you do not need to use stage one, but stage two mock up.

No, no, no.  ;)

All this is certainly not NEEDED, it may be the easiest way for SpaceX to do it. But if there the second stage could be a mockup, with no engine. It is just not needed.
Of course there is no need for second stage engine. It is just a structure resembling second stage provided with the connection for the trunk.

Offline Jcc

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No NET confirmed yet. No silly polls required (people are flapping their mouths on here so much they've forgot what this test is about and involves). ;)

Let's focus guys.

If you look at what is at stake, you can see why there is no rush. A successful test a few months late has no effect on CCtCap schedule. A failed test would have a big effect.
 

Offline saliva_sweet

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A successful test a few months late has no effect on CCtCap schedule.

I believe It was originally scheduled for september December 2013.
« Last Edit: 03/06/2015 06:06 pm by saliva_sweet »

Offline MP99



If they are actually going to use the LC-40 pad they need to be at the right height to guarantee that it won't hit the lightning suppressor wires.

Because it's impossible to take the observed flight trajectory, translate it to the proper launch position, and demonstrate that the path does not intersect the lightning tower guide wires? This is not rocket science.

Because in an abort situation the chance that all the motors ignite at exactly the same instant cannot be guaranteed.  There will be some initial wobble.  SpaceX will have calculated the worst case of course. However what might be acceptable with the Dragon at top of the stack may not be acceptable at ground level. The easiest way to avoid having to worry about any non-real conditions is to do the abort exactly as if it was attached to a real falcon 9.

IIUC, the SuperDraco will use pulse modulation to throttle. This implies an extremely high response speed, which makes sense given the requirements for attitude adjustment.

ISTM this makes it unlikely for a major difference in startup time.

Cheers, Martin

Offline SpacemanInSPACE

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If they are unable to test before Turmensat, the still to be decided scheduling of SES-9 might give a clue to the next available window.
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Offline SVBarnard

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i take it that this aint gonna happen before their next launch? but i presume this will happen before CRS-6 though? anyone

Offline TOG

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Has anyone said that it cannot be done on Friday?
M's Laws of Aerodynamics:                                    On Physics Exam:
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Offline averagespacejoe

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I would much rather it go off perfect then be rushed, but this has been a rather quiet aspect of the SpaceX schedule.

Offline swervin

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If they're being secretive, perhaps watch for FAA TFR's (temp flight restrictions) around LC-40. That might indicate something is going to go up into the sky, say, a rocketing capsule.... and approximately when!

Splinter

Offline Kabloona

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If they're being secretive, perhaps watch for FAA TFR's (temp flight restrictions) around LC-40. That might indicate something is going to go up into the sky, say, a rocketing capsule.... and approximately when!

Splinter

Good call, swervin. Here it is, a TFR for Friday 13 th at the Cape:

http://tfr.faa.gov/tfr2/list.html
http://tfr.faa.gov/save_pages/detail_5_1744.html

Restricted area looks consistent with expected Dragon abort trajectory. Also seems to be centered on LC-40.
« Last Edit: 03/10/2015 01:52 pm by Kabloona »

Online Galactic Penguin SST

If they're being secretive, perhaps watch for FAA TFR's (temp flight restrictions) around LC-40. That might indicate something is going to go up into the sky, say, a rocketing capsule.... and approximately when!

Splinter

Good call, swervin. Here it is, a TFR for Friday 13 th at the Cape:

http://tfr.faa.gov/tfr2/list.html
http://tfr.faa.gov/save_pages/detail_5_1744.html

Restricted area looks consistent with expected Dragon abort trajectory.

Nope, that's for the launch of MMS.  ;)
Astronomy & spaceflight geek penguin. In a relationship w/ Space Shuttle Discovery. Current Priority: Chasing the Chinese Spaceflight Wonder Egg & A Certain Chinese Mars Rover

Offline Kabloona

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Aw, shucks...you're right, MMS.
« Last Edit: 03/10/2015 01:58 pm by Kabloona »

Offline swervin

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Kabloona, good research, Penguin, good catch. I assume they'll have a TFR for the test, so probably worth it to keep any eye on things. May be an indicator.

Splinter

Offline Chris Bergin

No date set of now. I have feelers out, many fingers in many pies, phones tapped and....Oh wait, not the latter ;)

When I know, you'll know.
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Offline gongora

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Tweet from James Dean "SpaceX says targeting late March/early April Dragon pad abort test from Cape."
https://twitter.com/flatoday_jdean/status/575350070733848576

Offline Gary NASA

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That's just the NET as chris has said. Not date set yet.

Offline gongora

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That's just the NET as chris has said. Not date set yet.

Well, it should move date speculation to between the next two launches instead of possibly before the next launch.

Offline SpacemanInSPACE

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Tweet from James Dean "SpaceX says targeting late March/early April Dragon pad abort test from Cape."
https://twitter.com/flatoday_jdean/status/575350070733848576

I don't see pad abort happening in between the 3 weeks from Turkmen and CRS-6, and i'm an ignorant spacex fan.
Space is worth it God Damnit!

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