-
#220 by Ford Mustang on 09 Dec, 2007 11:53
-
Hoping to have Doug Lyons at the console with the PAO.
MMT will formally convene in about 1 hour. We do anticipate to have a press conference whenever that is over. -
#221 by Andy USA on 09 Dec, 2007 11:55
-
Quote
shuttlefan - 9/12/2007 6:46 AM
QuoteChris Bergin - 9/12/2007 6:41 AM
LOX ECO number 3 just failed DRY, per L2. Damn.
Sorry if I'm jumping on this too early Chris, but is this the first case of a LOX ECO failing in the history of this whole ECO sensor fiasco?
The LOX ECOs were the problem during the earlier flights, I recall. -
#222 by dotdk on 09 Dec, 2007 11:56
-
Did they have ECO problems for 25 years of the program or has it gone worse in recent years?
-
#223 by John44 on 09 Dec, 2007 11:56
-
Videos
STS-122 - TANKING COMMENTARY Part 1
http://www.space-multimedia.nl.eu.org/index.php?option=com_content&task=view&id=3186&Itemid=2
STS-122 - TANKING Scrubbed
http://www.space-multimedia.nl.eu.org/index.php?option=com_content&task=view&id=3187&Itemid=2
-
#224 by shuttlefan on 09 Dec, 2007 11:58
-
Quote
dotdk - 9/12/2007 6:56 AM
Did they have ECO problems for 25 years of the program or has it gone worse in recent years?
It got far more worse starting with the first tanking test for the Return-to-Flight mission, STS-114 in 2005. -
#225 by DaveS on 09 Dec, 2007 11:58
-
Quote
Andy USA - 9/12/2007 1:55 PM
Wrong! It has always the been the LH2(hydrogen) ECO sensors that have failed. Never a LOX ECO sensor.Quoteshuttlefan - 9/12/2007 6:46 AM
QuoteChris Bergin - 9/12/2007 6:41 AM
LOX ECO number 3 just failed DRY, per L2. Damn.
Sorry if I'm jumping on this too early Chris, but is this the first case of a LOX ECO failing in the history of this whole ECO sensor fiasco?
The LOX ECOs were the problem during the earlier flights, I recall. -
#226 by dember on 09 Dec, 2007 11:59
-
Did things just get better or worse?
-
#227 by Chris Bergin on 09 Dec, 2007 11:59
-
To add, they've still got LOX in the tank, they've not drained it back yet...hense "failing DRY" on that LOX ECO number 3.
-
#228 by Integrator on 09 Dec, 2007 12:00
-
Quote
shuttlefan - 9/12/2007 6:58 AM
Quotedotdk - 9/12/2007 6:56 AM
Did they have ECO problems for 25 years of the program or has it gone worse in recent years?
It got far more worse starting with the first tanking test for the Return-to-Flight mission, STS-114 in 2005.
That's because they changed the launch criteria. -
#229 by DaveS on 09 Dec, 2007 12:01
-
Quote
dember - 9/12/2007 1:59 PM
Worse! Especially with a LOX ECO sensor failing "DRY".
Did things just get better or worse? -
#230 by Ford Mustang on 09 Dec, 2007 12:01
-
Still draining LOX. Once that is finished, going to drain LH2. Troubleshooting begins particularly at 5%.
EDIT: Dave, if there was LOX still in the tank, wouldn't it fail dry anyways, since it was still wet, as Chris has said?
-
#231 by joncz on 09 Dec, 2007 12:05
-
To address some of the recent inaccurate comments:
- This is the first LOX ECO failure.
- This is the first "Failed Dry" failure
- The LCC changed post-Challenger from 3/4 to 4/4. The LCC didn't change RTF on the count (I cannot say for sure whether the number of times they're looked at during the countdown changed RTF).
-
#232 by Chris Bergin on 09 Dec, 2007 12:05
-
Quote
Ford Mustang - 9/12/2007 1:01 PM
Still draining LOX. Once that is finished, going to drain LH2. Troubleshooting begins particularly at 5%.
EDIT: Dave, if there was LOX still in the tank, wouldn't it fail dry anyways, since it was still wet, as Chris has said?
Eh? The sensor should show "WET" as it is wet with LOX. To show DRY is an error. -
#233 by Ford Mustang on 09 Dec, 2007 12:06
-
Quote
Chris Bergin - 9/12/2007 8:05 AM
QuoteFord Mustang - 9/12/2007 1:01 PM
Still draining LOX. Once that is finished, going to drain LH2. Troubleshooting begins particularly at 5%.
EDIT: Dave, if there was LOX still in the tank, wouldn't it fail dry anyways, since it was still wet, as Chris has said?
Eh? The sensor should show "WET" as it is wet with LOX. To show DRY is an error.
Ah, misunderstood there. Thanks for clearing that up for me, Chris. Too early for all of this..
-
#234 by Celebrimbor on 09 Dec, 2007 12:06
-
So a LOX failing dry is an open or closed circuit?
EDIT: or: if you cut the wires, an LH2 fails wet and a LOX fails dry? -
#235 by Integrator on 09 Dec, 2007 12:07
-
say again when this launch window closes and why
thanks -
#236 by Chris Bergin on 09 Dec, 2007 12:08
-
Quote
Integrator - 9/12/2007 1:07 PM
say again when this launch window closes and why
thanks
13th - Beta Angle. -
#237 by shuttlefan on 09 Dec, 2007 12:09
-
Quote
Ford Mustang - 9/12/2007 7:01 AM
Still draining LOX. Once that is finished, going to drain LH2. Troubleshooting begins particularly at 5%.
EDIT: Dave, if there was LOX still in the tank, wouldn't it fail dry anyways, since it was still wet, as Chris has said?
So for troubleshooting to begin at 5%, will they leave 5% LH2 in the tank for awhile to perform that troubleshooting? -
#238 by ntschke on 09 Dec, 2007 12:10
-
Quote
joncz - 9/12/2007 8:05 AM To address some of the recent inaccurate comments: - This is the first LOX ECO failure. - This is the first "Failed Dry" failure - The LCC changed post-Challenger from 3/4 to 4/4. The LCC didn't change RTF on the count (I cannot say for sure whether the number of times they're looked at during the countdown changed RTF).
Up until yesterday, the LCC was 3/4. They switched to 4/4 for this attempt only. Was it ever 4/4 beofore today?
-
#239 by Integrator on 09 Dec, 2007 12:10
-
and the next opportunity is Jan 9? we have requested special instrumentation on the next flight so this will affect that request.
