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#1480
by
deltaV
on 22 Dec, 2015 02:42
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I wonder why the returned stage has a white band in the middle with less soot than above and below.
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#1481
by
OSE
on 22 Dec, 2015 02:43
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I wonder why the returned stage has a white band in the middle with less soot than above and below.
Liquid oxygen vs. RP-1 tanks I think.
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#1482
by
abaddon
on 22 Dec, 2015 02:44
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I wonder why the returned stage has a white band in the middle with less soot than above and below.
That's the area of the 1st stage LOX tank, isn't it? Probably ice or at least some condensation keeping the soot from sticking, would be my guess.
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#1483
by
hrissan
on 22 Dec, 2015 02:46
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I wonder why the returned stage has a white band in the middle with less soot than above and below.
That's the area of the 1st stage LOX tank, isn't it? Probably ice or at least some condensation keeping the soot from sticking, would be my guess.
The LOX tank goes the whole length up to the interstage, the soot band is on only the part of the LOX tank, that's a bit puzzling.
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#1484
by
jg
on 22 Dec, 2015 02:48
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I wonder why the returned stage has a white band in the middle with less soot than above and below.
That's the area of the 1st stage LOX tank, isn't it? Probably ice or at least some condensation keeping the soot from sticking, would be my guess.
The LOX tank goes the whole length up to the interstage, the soot band is on only the part of the LOX tank, that's a bit puzzling.
The LOX is cold. Soot is condensing out on the cold part of the tank, but less so on the much warmer RP1 tank.
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#1485
by
OSE
on 22 Dec, 2015 02:48
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#1486
by
Kabloona
on 22 Dec, 2015 02:49
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If you look at the "double streak" long exposure picture, it seems to show such a maneuver. The return streak looks shallower, as if it's walking the IIP from off shore to the pad.
Yes, but don't forget the rectilinear distortion in the wide angle lens. Something in the corner of such an image can look quite crooked and still be vertical in reality.
Agreed. Hence my hedge... but the difference is really noticeable, and the streaks are not THAT far from each other.
I also realize there's an angle change wrt the camera, irrespective of the lens effect.
Still though.
Here is another image, from SpaceX. It looks much more vertical from this point of view. It is coming in a bit from the side (the nearer streak is the landing), but it is hard to tell how much is from the trajectory and what is from a divert maneuver.
From the "pencil landing" graphic it looked like most/all of the divert was before the landing burn, ie done by grid fins.
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#1487
by
deltaV
on 22 Dec, 2015 02:49
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If the white part is the LOX tank, what's the ~10 m of stage between the white part and the interstage for? The upper dome of the LOX tank is probably about 2 m of that, so what's the rest for?
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#1488
by
imjustmatthew
on 22 Dec, 2015 02:50
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#1489
by
Kabloona
on 22 Dec, 2015 02:50
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#1490
by
kirghizstan
on 22 Dec, 2015 02:51
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looks like part of the logo
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#1491
by
Craftyatom
on 22 Dec, 2015 02:51
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I wonder why the returned stage has a white band in the middle with less soot than above and below.
That's the area of the 1st stage LOX tank, isn't it? Probably ice or at least some condensation keeping the soot from sticking, would be my guess.
The LOX tank goes the whole length up to the interstage, the soot band is on only the part of the LOX tank, that's a bit puzzling.
The soot comes from the boostback and reentry burns, I'd assume (since the rocket is flying into its own plume for those), so maybe the top part of the tank has warmed up a bit with most of the LOX already having been used.
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#1492
by
Lars-J
on 22 Dec, 2015 02:51
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If the white part is the LOX tank, what's the ~10 m of stage between the white part and the interstage for? The upper dome of the LOX tank is probably about 2 m of that, so what's the rest for?
The LOX tank goes all the way up to the interstage. The difference in appearance may be for a different coating for the outside or inside of that part of the tank. And there is no 2m gap between the LOX and RP tank, F9 uses common bulkhead tanks.
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#1493
by
Silmfeanor
on 22 Dec, 2015 02:52
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Is it just me or does it looks like there's some cracking under where the landing leg was on the left side of Elon's video?
https://twitter.com/elonmusk/status/679145544673923072
that's a wire, part of the landing leg assembly I assume
in the video, we hear some quite load noises. Perhaps some drilling bolts into concrete to secure the stage with?
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#1494
by
WTF
on 22 Dec, 2015 02:52
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Congratulations to the SpaceX team on the RTF, deploying the constellation of satellites, and landing the booster.
Note at the 22 minute mark of the webcast (youtube) ... 'the Falcon 9 engine now has a 33% increase in performance'.
As good a successful demonstration of "doubling down" as I've seen.
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#1495
by
deltaV
on 22 Dec, 2015 02:53
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#1496
by
OSE
on 22 Dec, 2015 02:54
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Is it just me or does it looks like there's some cracking under where the landing leg was on the left side of Elon's video?
https://twitter.com/elonmusk/status/679145544673923072
If you are talking about where the leg was before it was deployed, I think that is some cabling.
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#1497
by
matthewkantar
on 22 Dec, 2015 02:55
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Looks like the concrete held up fine.
Matthew
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#1498
by
Kabloona
on 22 Dec, 2015 02:56
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#1499
by
AS-503
on 22 Dec, 2015 02:56
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