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#340
by
Silmfeanor
on 08 Aug, 2011 16:03
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... should the rocket dismantle.
I like the author's word choice 
sorta like RUD or Engine rich exhaust, eh?
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#341
by
alexw
on 09 Aug, 2011 03:42
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EDIT: Ken Kremer asked a question that gave Scott Bolton an opportunity to provide an excellent story on the background of Juno, how the mission itself came into being. Highly recommended viewing! The timecode to fast forward to is 18m20s.
Thanks, ChrisC and ugordon -- that was a interesting glimpse of the history.
-Alex
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#342
by
ugordan
on 09 Aug, 2011 08:46
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ULA launch highlights video:
Interesting copyright notice at the end "Footage courtesy of NASA". Does NASA actually own the tracking assets and onboard footage for their missions when its ULA who actually handles the launch (and presumably pays range fees)?
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#343
by
DT1
on 09 Aug, 2011 10:40
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ULA launch highlights video:
Interesting copyright notice at the end "Footage courtesy of NASA". Does NASA actually own the tracking assets and onboard footage for their missions when its ULA who actually handles the launch (and presumably pays range fees)?
Interesting for me is that the video chronology is slightly wrong. You can see the venting of the payload fairing or whatever it is (1:49 onwards) after the separation of the payload fairing (already at 1:41).
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#344
by
gwiz
on 09 Aug, 2011 13:05
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Interesting for me is that the video chronology is slightly wrong. You can see the venting of the payload fairing or whatever it is (1:49 onwards) after the separation of the payload fairing (already at 1:41).
The venting from 1:49 is from the fuel tank, not the payload fairing.
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#345
by
DT1
on 09 Aug, 2011 13:42
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Interesting for me is that the video chronology is slightly wrong. You can see the venting of the payload fairing or whatever it is (1:49 onwards) after the separation of the payload fairing (already at 1:41).
The venting from 1:49 is from the fuel tank, not the payload fairing.
OK - but you can clearly see that the pipe is separated together with the fairing at 1:41 (but of course, I am not an Atlas specialist).
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#346
by
ugordan
on 09 Aug, 2011 13:53
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That's splitting hairs, the LH2 vent fin *is* connected to the fairing even though the gas obviously comes from Centaur's tank.
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#347
by
Antares
on 09 Aug, 2011 14:15
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Some fool in a boat. Choppers sent out to have a stern word 
Article about these range clearing choppers...
Rescue reservists support successful rocket launch
Odd bragging when they couldn't keep the SCO box clear. L2 note that they got an action at one of the reviews to get extra assets to do just that.
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#348
by
edkyle99
on 09 Aug, 2011 14:28
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That's splitting hairs, the LH2 vent fin *is* connected to the fairing even though the gas obviously comes from Centaur's tank.
Isn't this the "boost phase chilldown" of the RL10 engine? The gases might be passing through the engine nozzle at this point.
- Ed Kyle
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#349
by
corrodedNut
on 09 Aug, 2011 14:49
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Although these diagrams are from the wider diameter Titan Centaur, like the Atlas V 5xx vehicle, the fairing encapsulates both the payload and the Centaur. Both systems should be fairly similar, if only for illustrative purposes.
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#350
by
ugordan
on 09 Aug, 2011 14:52
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That's splitting hairs, the LH2 vent fin *is* connected to the fairing even though the gas obviously comes from Centaur's tank.
Isn't this the "boost phase chilldown" of the RL10 engine? The gases might be passing through the engine nozzle at this point.
- Ed Kyle
If you look carefully in the video, you'll see that's a different point of outgassing (lower down, somewhere around the interstage area) and only strengthens up shortly before BECO. From what I can see, the LH2 fin is venting the whole time, in one of the recent early evening launches it was readily visible from the ground.
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#351
by
Ronsmytheiii
on 10 Aug, 2011 00:46
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#352
by
robertross
on 10 Aug, 2011 01:10
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That's cool Ron!
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#353
by
Art LeBrun
on 10 Aug, 2011 01:17
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Nice animations. Really like the rapid pitchover............
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#354
by
Kim Keller
on 11 Aug, 2011 17:55
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There was a third one for spacecraft separation but realtime relay from Australia was not available.
Does that mean there was signal received on the ground in Australia, just no live relay?
BTW, wasn't the spacecraft in the darkness then anyway?
Yes and there was a light with the camera.
lesson learned: verify that recorder is
on during downlink. I guess the only people who saw s/c sep were a few Australian techs monitoring the downlink...
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#355
by
just-nick
on 11 Aug, 2011 19:40
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That's splitting hairs, the LH2 vent fin *is* connected to the fairing even though the gas obviously comes from Centaur's tank.
Isn't this the "boost phase chilldown" of the RL10 engine? The gases might be passing through the engine nozzle at this point.
- Ed Kyle
If you look carefully in the video, you'll see that's a different point of outgassing (lower down, somewhere around the interstage area) and only strengthens up shortly before BECO. From what I can see, the LH2 fin is venting the whole time, in one of the recent early evening launches it was readily visible from the ground.
Doesn't the Centaur RCS do some thermal conditioning burns as well, even while still attached?
-N
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#356
by
yg1968
on 15 Aug, 2011 17:57
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There was a third one for spacecraft separation but realtime relay from Australia was not available.
Does that mean there was signal received on the ground in Australia, just no live relay?
BTW, wasn't the spacecraft in the darkness then anyway?
Yes and there was a light with the camera.
lesson learned: verify that recorder is on during downlink. I guess the only people who saw s/c sep were a few Australian techs monitoring the downlink...
Even if there was no live relay, they must have recorded it in Australia, I would imagine?
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#357
by
Kim Keller
on 15 Aug, 2011 19:46
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No, and that was the thrust of my comment. The recorders were NOT turned on due to an oversight.
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#358
by
ugordan
on 15 Aug, 2011 19:55
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Well, it was probably overexposed and non-spectacular, anyway...
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#359
by
Blackstar
on 16 Aug, 2011 04:50
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No, and that was the thrust of my comment. The recorders were NOT turned on due to an oversight.
Oh, it was probably recorded, but the tapes were placed in the same location as the Apollo 11 recordings.
