|
Zoomer30
|
|
« Reply #15 on: 06/04/2011 03:03 AM » |
|
In the STS-68 abort, it was due to one of the turbopump discharge temps going over the redline limit. Can't remember off hand if it was LH2 or LOX.
Had the issue taken just a bit longer (half s second I think) the redline limit would have been increased and the abort may not have happened. All ended up to be a bad sensor if memory serves.
|
|
|
|
rdale
|
|
« Reply #16 on: 06/04/2011 03:09 AM » |
|
Watching it on youtube you can see how much the shuttle is oscillating when the swing arm moves into position. Isn't that the arm bouncing around?
|
|
|
|
shuttlefanatic
|
|
« Reply #17 on: 06/04/2011 03:53 AM » |
|
It looks like you can kind of tell something is up with the engines at startup because you can hear a loud 'pop'.
If you're referring to the 'pop' at 0:32 in the video (~T-9s), I believe that's just the hydrogen igniters going off.
|
|
|
|
TrueBlueWitt
|
|
« Reply #18 on: 06/04/2011 04:11 AM » |
|
Watching it on youtube you can see how much the shuttle is oscillating when the swing arm moves into position.
Isn't that the arm bouncing around?
No.. Shuttle stack. If you watch the close up videos at main engine start, the whole stack rocks a bit. Huge offset load from SSME's start.. The whole stack only held down at the bottom of the SSRBs.. which while very stiff still flex under the SSME load.. (actually they unload as they are flexed a bit to shuttle side by it's mass when sitting at pad. then when SSME light and offset the mass of the shuttle the SSRB casing straighten out then load other way). At cutoff.. when offset load is removed.. the whole stack sways back toward the orbiter.. then oscillates for a while. The SSRBs are big beams(read springs) in essence.. held at one end like a diving board.
|
|
|
|
rdale
|
|
« Reply #19 on: 06/04/2011 05:04 AM » |
|
Watching it on youtube you can see how much the shuttle is oscillating when the swing arm moves into position.
Isn't that the arm bouncing around?
No.. Shuttle stack. If you watch the close up videos at main engine start, the whole stack rocks a bit.
Understood - but we're talking about A+45 seconds when the access arm is back in. I guess I can't see that it's still rocking that much versus the bouncing of the arm.
|
|
|
|
astronut7
|
|
« Reply #20 on: 07/17/2011 12:51 PM » |
|
I have audio coverage of STS 51-F launch abort on audio tape, but no video tape. Once again, does any space fans have video of the STS51-F launch abort?
|
|
|
|
|
|
GLS
|
|
« Reply #22 on: 07/23/2011 06:07 PM » |
|
also here @ 4:30
<![CDATA[<a href="http://www.youtube.com/v/GQ2AYEHOjXg&rel=1" target="_blank">http://www.youtube.com/v/GQ2AYEHOjXg&rel=1</a>]]>
|
|
|
|
Zpoxy
|
|
« Reply #23 on: 07/24/2011 04:30 PM » |
|
Watching it on youtube you can see how much the shuttle is oscillating when the swing arm moves into position.
Isn't that the arm bouncing around?
No.. Shuttle stack. If you watch the close up videos at main engine start, the whole stack rocks a bit.
Huge offset load from SSME's start.. The whole stack only held down at the bottom of the SSRBs.. which while very stiff still flex under the SSME load.. (actually they unload as they are flexed a bit to shuttle side by it's mass when sitting at pad. then when SSME light and offset the mass of the shuttle the SSRB casing straighten out then load other way). At cutoff.. when offset load is removed.. the whole stack sways back toward the orbiter.. then oscillates for a while. The SSRBs are big beams(read springs) in essence.. held at one end like a diving board.
Sorry, you are wrong. The stack does oscillate but no where near that fast. The wobbling in the video is caused by the Orbiter Access Arm swinging back and forth after the fast extend. Look at the hatch frame and the hatch bridge mounted on the right and left walls. They are rocking back and forth on their hinge restraints, in unison and in time with the movements of the swing arm.
|
|
|
|
ugordan
|
|
« Reply #24 on: 07/24/2011 09:03 PM » |
|
I agree it's the access arm rocking, it's just way too fast for it to be the stack.
|
|
|
|
TrueBlueWitt
|
|
« Reply #25 on: 07/24/2011 09:14 PM » |
|
Watching it on youtube you can see how much the shuttle is oscillating when the swing arm moves into position.
Isn't that the arm bouncing around?
No.. Shuttle stack. If you watch the close up videos at main engine start, the whole stack rocks a bit.
Huge offset load from SSME's start.. The whole stack only held down at the bottom of the SSRBs.. which while very stiff still flex under the SSME load.. (actually they unload as they are flexed a bit to shuttle side by it's mass when sitting at pad. then when SSME light and offset the mass of the shuttle the SSRB casing straighten out then load other way). At cutoff.. when offset load is removed.. the whole stack sways back toward the orbiter.. then oscillates for a while. The SSRBs are big beams(read springs) in essence.. held at one end like a diving board.
Sorry, you are wrong. The stack does oscillate but no where near that fast. The wobbling in the video is caused by the Orbiter Access Arm swinging back and forth after the fast extend. Look at the hatch frame and the hatch bridge mounted on the right and left walls. They are rocking back and forth on their hinge restraints, in unison and in time with the movements of the swing arm.
Watching it again, you have both in play, the orbiter access arm does slam the stop and oscillate a bit, the whole stack is also rocking at the same time if you watch the brief shot of the orbiter right after the shot from the arm.
|
|
|
|
Gargoyle Man
|
|
« Reply #26 on: 08/12/2012 09:14 PM » |
|
There HAS to be a video somewhere out there of the first attempt of STS-51F, when the engines shutdown at T-3.
I've seen the ATO video and that's all; youtube has all the other pad-aborts, but no one seems to have video of this one.... any ideas?
The film can now be downloaded in the L2 movie section 
For some reason when I got to the L2 movie section, I got an error message saying that the file is missing. Judging by the photos of the incident that you posted, it seems that you have the video. Can you upload it? If for some reason you can't, I'd recommend finding on the internet a video type converter. I'm deeply surprised that no one has ever bothered to upload the video of STS 51-F's RSLS abort. 
|
|
|
|
Chris Bergin
|
|
« Reply #27 on: 08/13/2012 12:25 AM » |
|
There HAS to be a video somewhere out there of the first attempt of STS-51F, when the engines shutdown at T-3.
I've seen the ATO video and that's all; youtube has all the other pad-aborts, but no one seems to have video of this one.... any ideas?
The film can now be downloaded in the L2 movie section
For some reason when I got to the L2 movie section, I got an error message saying that the file is missing.
You've got to join L2 to access L2 
|
|
|
|
mainengine
|
|
« Reply #28 on: 08/18/2012 11:02 AM » |
|
There HAS to be a video somewhere out there of the first attempt of STS-51F, when the engines shutdown at T-3.
I've seen the ATO video and that's all; youtube has all the other pad-aborts, but no one seems to have video of this one.... any ideas?
The film can now be downloaded in the L2 movie section
do you have a link ?
|
|
|
|
AnalogMan
|
|
« Reply #29 on: 08/18/2012 05:12 PM » |
|
There HAS to be a video somewhere out there of the first attempt of STS-51F, when the engines shutdown at T-3.
I've seen the ATO video and that's all; youtube has all the other pad-aborts, but no one seems to have video of this one.... any ideas?
The film can now be downloaded in the L2 movie section
do you have a link ?
http://forum.nasaspaceflight.com/index.php?topic=25307.0
|
|
|
|
