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#40
by
the_other_Doug
on 03 May, 2015 22:41
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Yes. Buster the crash test dummy will be taking a ride.
THE Buster, from Mythbusters? Probably not but that would be cool
Maybe Buster's rocket-flying cousin 
Nope. I have it on good authority that it will be the Stig's rocket-flying cousin.
And on that bombshell...
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#41
by
Prober
on 04 May, 2015 14:01
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"I'm here to put you back on schedule." may the 4th be with you
Crank this up you need to feel the engines
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#42
by
WindnWar
on 04 May, 2015 15:39
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#43
by
kch
on 04 May, 2015 15:45
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may the 4th be with you
... and altho with you ...
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#44
by
Rocket Science
on 04 May, 2015 16:05
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And on that note...
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#45
by
NovaSilisko
on 04 May, 2015 23:29
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I apparently am a minor prophet.
Compare SpaceX's infographic to the ugly one I made a while ago upon knowledge of fins trickling out:
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#46
by
Astro_Zach
on 04 May, 2015 23:32
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I apparently am a minor prophet.
Compare SpaceX's infographic to the ugly one I made a while ago upon knowledge of fins trickling out:
Well either that or you have a nice understanding of an abort system.
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#47
by
kirghizstan
on 04 May, 2015 23:32
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I apparently am a minor prophet.
Compare SpaceX's infographic to the ugly one I made a while ago upon knowledge of fins trickling out:
you got the trunk entering the drink upside down. obviously you are completely wrong
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#48
by
Astro_Zach
on 04 May, 2015 23:35
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I apparently am a minor prophet.
Compare SpaceX's infographic to the ugly one I made a while ago upon knowledge of fins trickling out:
you got the trunk entering the drink upside down. obviously you are completely wrong
FTFY
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#49
by
NovaSilisko
on 04 May, 2015 23:36
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Also the original version which I deemed unlikely since there's no point in having chutes on the trunk.
I guess the reality is in between my two images. In the first one, the thrusters are burning for a very short period after the trunk separates, to give a bit more relative velocity. In this one, drag handles it, but it has chutes.
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#50
by
Astro_Zach
on 04 May, 2015 23:40
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Also the original version which I deemed unlikely since there's no point in having chutes on the trunk.
I guess the reality is in between my two images. In the first one, the thrusters are burning for a very short period after the trunk separates, to give a bit more relative velocity. In this one, drag handles it, but it has chutes.
So the solution is more parachutes?
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#51
by
QuantumG
on 04 May, 2015 23:42
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I can understand why the capsule doesn't continue on a parabolic trajectory - it has parachutes, but what makes the trunk fall almost straight down like it does in the SpaceX infographic? Wouldn't it go further downrange than the capsule?
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#52
by
Robotbeat
on 04 May, 2015 23:57
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I can understand why the capsule doesn't continue on a parabolic trajectory - it has parachutes, but what makes the trunk fall almost straight down like it does in the SpaceX infographic? Wouldn't it go further downrange than the capsule?
Ballistic coefficient is lower for the trunk. Additionally, there could be a small separation boost by the (regular) Dracos at separation.
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#53
by
jabe
on 04 May, 2015 23:58
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I can understand why the capsule doesn't continue on a parabolic trajectory - it has parachutes, but what makes the trunk fall almost straight down like it does in the SpaceX infographic? Wouldn't it go further downrange than the capsule?
harzard guess...less mass.. high drag so slows quicker..however... I have made "tube paper airplanes" that go forever
http://www.instructables.com/id/Tubular-paper-airplane/ jb
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#54
by
oiorionsbelt
on 05 May, 2015 02:29
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I apparently am a minor prophet.
Compare SpaceX's infographic to the ugly one I made a while ago upon knowledge of fins trickling out:
you got the trunk entering the drink upside down. obviously you are completely wrong
Why wouldn't the trunk turn and enter they way NovaSilisko drew it? Seems as though that would be the stable orientation.
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#55
by
Kabloona
on 05 May, 2015 02:55
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I apparently am a minor prophet.
Compare SpaceX's infographic to the ugly one I made a while ago upon knowledge of fins trickling out:
you got the trunk entering the drink upside down. obviously you are completely wrong
Why wouldn't the trunk turn and enter they way NovaSilisko drew it? Seems as though that would be the stable orientation.
I don't know which way the interstage will actually fall, but aft end first is possible.
The actual geometry of the fins is much different than how NovaSilisko drew them. The actual fin geometry has much less surface area, meaning much less effect on the overall center of pressure. So the fins may lower the center of gravity more than they lower the center of pressure. The center of pressure then stays forward of the center of gravity, causing the interstage to fall aft end first.
Also possible that the interstage center of gravity (even without fins) is slightly aft of midpoint.
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#56
by
darkenfast
on 05 May, 2015 03:09
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Not that it matters much (and we shall hopefully see shortly), but the trunk has the support beams just under the heat shield of the Dragon. That might be just enough weight to shuttlecock the trunk as it falls. Next OCD issue: will the airstream blow out the Kevlar/insulation layer at the front of the trunk?
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#57
by
okan170
on 05 May, 2015 04:08
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I apparently am a minor prophet.
Compare SpaceX's infographic to the ugly one I made a while ago upon knowledge of fins trickling out:
Be sure to use your newfound powers for good not evil!
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#58
by
Galactic Penguin SST
on 05 May, 2015 05:55
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#59
by
chalz
on 05 May, 2015 09:48
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I can't believe I had zero memory of that one (too focused on Atlantis and the 1st ever F9 maybe?), but if all goes right Dragon's pad abort came exactly 5 years after Orion's Pad Abort-1 test! 
Nice reference. I had a look back at the
schedule thread and at the time Orion's first flight was sketched in for December 2013 on Ares I. So if history repeats Dragon 2 could soon find its rocket getting cancelled from underneath it and replaced with a BFR due in about 2023.
A pretty big if though.
