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#940
by
tnphysics
on 30 Aug, 2007 01:25
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Not if it's regeneratively cooled.
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#941
by
Jim
on 30 Aug, 2007 11:41
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tnphysics - 29/8/2007 9:25 PM
Not if it's regeneratively cooled.
They are radiation cooled and made of carbon-carbon
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#942
by
ChrisGebhardt
on 30 Aug, 2007 21:27
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Can someone provide me with/direct me to a list of all the LCC calls to the PLT and CDR during the final 9min of the countdown. Thanks.
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#943
by
Jim
on 30 Aug, 2007 21:44
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Trekkie07 - 30/8/2007 5:27 PM
Can someone provide me with/direct me to a list of all the LCC calls to the PLT and CDR during the final 9min of the countdown. Thanks.
Look at the countdown on NASA.gov
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#944
by
ChrisGebhardt
on 31 Aug, 2007 00:39
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Jim - 30/8/2007 5:44 PM
Trekkie07 - 30/8/2007 5:27 PM
Can someone provide me with/direct me to a list of all the LCC calls to the PLT and CDR during the final 9min of the countdown. Thanks.
Look at the countdown on NASA.gov
Could you be a little more specific... simply looking at countdown doesn't give me what I'm looking for. I'm looking for the calls like, "OTC to PLT, preform APU start." Thanks
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#945
by
swhitt
on 31 Aug, 2007 00:47
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Trekkie07 - 30/8/2007 5:39 PM
Jim - 30/8/2007 5:44 PM
Trekkie07 - 30/8/2007 5:27 PM
Can someone provide me with/direct me to a list of all the LCC calls to the PLT and CDR during the final 9min of the countdown. Thanks.
Look at the countdown on NASA.gov
Could you be a little more specific... simply looking at countdown doesn't give me what I'm looking for. I'm looking for the calls like, "OTC to PLT, preform APU start." Thanks
google "countdown nasa.gov"
select the 6th item on the list
Jim's answers are short, but usually right. :-)
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#946
by
Jim
on 31 Aug, 2007 01:21
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Trekkie07 - 30/8/2007 8:39 PM
Jim - 30/8/2007 5:44 PM
Trekkie07 - 30/8/2007 5:27 PM
Can someone provide me with/direct me to a list of all the LCC calls to the PLT and CDR during the final 9min of the countdown. Thanks.
Look at the countdown on NASA.gov
Could you be a little more specific... simply looking at countdown doesn't give me what I'm looking for. I'm looking for the calls like, "OTC to PLT, preform APU start." Thanks[/QUOTE
Why can't people search for themselve? I would have had to done the search myself using google
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#947
by
AstroRJY
on 31 Aug, 2007 01:49
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Trekkie I can tell you the calls right off the top of my head from watching dozens of launches, here ya go:
T-8 minutes: PLT take AC bus sensors to MONITOR. (1980s and 1990s)
T-7:45 (approxiamtely) PLT configure FUEL CELL/ ESSENTIAL BUS SOURCE switches
T-6 minutes PLT perform APU pre-start
T-5 minutes PLT perform APU start
T-5 minutes CDR reconfigure heaters (turn the orbiter's FLASH EVAPORATOR FEEDLINE heaters A and B to OFF)
T-2:30 PLT clear Caution/ Warning memory, verify no unexpected messages.
T- 2 minutes. Flight crew close and lock visors, open suit O2 valves.
All of these are from the OTC. And the network communicaiton format is "PLT, OTC perform.. " or "CDR, OTC perform..." , etc.
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#948
by
ChrisGebhardt
on 31 Aug, 2007 02:00
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AstroRJY - 30/8/2007 9:49 PM
Trekkie I can tell you the calls right off the top of my head from watching dozens of launches, here ya go:
T-8 minutes: PLT take AC bus sensors to MONITOR. (1980s and 1990s)
T-7:45 (approxiamtely) PLT configure FUEL CELL/ ESSENTIAL BUS SOURCE switches
T-6 minutes PLT perform APU pre-start
T-5 minutes PLT perform APU start
T-5 minutes CDR reconfigure heaters (turn the orbiter's FLASH EVAPORATOR FEEDLINE heaters A and B to OFF)
T-2:30 PLT clear Caution/ Warning memory, verify no unexpected messages.
T- 2 minutes. Flight crew close and lock visors, open suit O2 valves.
All of these are from the OTC. And the network communicaiton format is "PLT, OTC perform.. " or "CDR, OTC perform..." , etc.
Thank you. I tried searching nasa.gov and found that other document but it did not contain all the calls I was interested in. So thank you!!!!!!!!!!!!
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#949
by
mkirk
on 31 Aug, 2007 21:04
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AstroRJY - 30/8/2007 8:49 PM
Trekkie I can tell you the calls right off the top of my head from watching dozens of launches, here ya go:
T-8 minutes: PLT take AC bus sensors to MONITOR. (1980s and 1990s)
T-7:45 (approxiamtely) PLT configure FUEL CELL/ ESSENTIAL BUS SOURCE switches
T-6 minutes PLT perform APU pre-start
T-5 minutes PLT perform APU start
T-5 minutes CDR reconfigure heaters (turn the orbiter's FLASH EVAPORATOR FEEDLINE heaters A and B to OFF)
T-2:30 PLT clear Caution/ Warning memory, verify no unexpected messages.
T- 2 minutes. Flight crew close and lock visors, open suit O2 valves.
All of these are from the OTC. And the network communicaiton format is "PLT, OTC perform.. " or "CDR, OTC perform..." , etc.
Just FYI
"AC Bus Sensors to Monitor" is done at T-3 hours now by the ASP (Astronaut Support Person or "Cape Crusader") before Crew Ingress. With these sensors in monitor any overload, over or under voltage conditon on the busses would be anunciated but the busess will not be automatically taken off line.
"Connect Essential Busses to the Fuel Cells" is done at T-8 minutes. They wait until around T-8 minutes to do this so that the ground (i.e. Launch Control Center) can retain the ability to remotely power down the vehicle in an emergency, after this procedure the crew would have to power it down.
The only other formal call I can think of in the T-9 time frame would be to "Clear the hardware Caution and Warning Memory". This is done about 5 minutes prior to coming out of the hold at T-9.
Mark Kirkman
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#950
by
AstroRJY
on 01 Sep, 2007 01:33
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Thanks for the extra info Mark, you're a good man
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#951
by
GLS
on 01 Sep, 2007 12:10
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AstroRJY - 31/8/2007 2:49 AM
Trekkie I can tell you the calls right off the top of my head from watching dozens of launches, here ya go:
T-8 minutes: PLT take AC bus sensors to MONITOR. (1980s and 1990s)
T-7:45 (approxiamtely) PLT configure FUEL CELL/ ESSENTIAL BUS SOURCE switches
T-6 minutes PLT perform APU pre-start
T-5 minutes PLT perform APU start
T-5 minutes CDR reconfigure heaters (turn the orbiter's FLASH EVAPORATOR FEEDLINE heaters A and B to OFF)
T-2:30 PLT clear Caution/ Warning memory, verify no unexpected messages.
T- 2 minutes. Flight crew close and lock visors, open suit O2 valves.
All of these are from the OTC. And the network communicaiton format is "PLT, OTC perform.. " or "CDR, OTC perform..." , etc.
Isn't APU pre-start at T-6:15?
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#952
by
TJL
on 01 Sep, 2007 13:22
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How is it determined which payloads are installed in the payload bay while the shuttle is in the OPF and which are installed at the pad?
Thank you.
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#953
by
Jim
on 01 Sep, 2007 13:39
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TJL - 1/9/2007 9:22 AM
How is it determined which payloads are installed in the payload bay while the shuttle is in the OPF and which are installed at the pad?
Thank you.
It depends on how the payload is built up, what testing it needed and whether it is hazardous. Spacelabs were the primary horizontal installations. Spacehab went vertical after it demonstrated itself with the shuttle and the reduced time at the pad was better for them.
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#954
by
LSainsbury
on 01 Sep, 2007 13:45
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Installed at the pad?
Do they actually open the cargo bay doors at the pad to install payloads then?
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#955
by
AstroRJY
on 01 Sep, 2007 13:46
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GLS - 1/9/2007 8:10 AM
AstroRJY - 31/8/2007 2:49 AM
Trekkie I can tell you the calls right off the top of my head from watching dozens of launches, here ya go:
T-8 minutes: PLT take AC bus sensors to MONITOR. (1980s and 1990s)
T-7:45 (approxiamtely) PLT configure FUEL CELL/ ESSENTIAL BUS SOURCE switches
T-6 minutes PLT perform APU pre-start
T-5 minutes PLT perform APU start
T-5 minutes CDR reconfigure heaters (turn the orbiter's FLASH EVAPORATOR FEEDLINE heaters A and B to OFF)
T-2:30 PLT clear Caution/ Warning memory, verify no unexpected messages.
T- 2 minutes. Flight crew close and lock visors, open suit O2 valves.
All of these are from the OTC. And the network communicaiton format is "PLT, OTC perform.. " or "CDR, OTC perform..." , etc.
Isn't APU pre-start at T-6:15?
No. THe OTC asks for the hydraulic pressure recorders to start about T- 6:15 then once they are started he calls for the APU pre-start at T - 6 minutes. Sometimes the might do it a few seconds early but the timeline is T-6 minutes.
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#956
by
psloss
on 01 Sep, 2007 14:01
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LSainsbury - 1/9/2007 9:45 AM
Installed at the pad?
Do they actually open the cargo bay doors at the pad to install payloads then?
Most of the payloads have been installed at the pad -- for years and years.
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#957
by
LSainsbury
on 01 Sep, 2007 14:03
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Something new learned then!
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#958
by
GLS
on 01 Sep, 2007 14:21
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AstroRJY - 1/9/2007 2:46 PM
GLS - 1/9/2007 8:10 AM
AstroRJY - 31/8/2007 2:49 AM
Trekkie I can tell you the calls right off the top of my head from watching dozens of launches, here ya go:
T-8 minutes: PLT take AC bus sensors to MONITOR. (1980s and 1990s)
T-7:45 (approxiamtely) PLT configure FUEL CELL/ ESSENTIAL BUS SOURCE switches
T-6 minutes PLT perform APU pre-start
T-5 minutes PLT perform APU start
T-5 minutes CDR reconfigure heaters (turn the orbiter's FLASH EVAPORATOR FEEDLINE heaters A and B to OFF)
T-2:30 PLT clear Caution/ Warning memory, verify no unexpected messages.
T- 2 minutes. Flight crew close and lock visors, open suit O2 valves.
All of these are from the OTC. And the network communicaiton format is "PLT, OTC perform.. " or "CDR, OTC perform..." , etc.
Isn't APU pre-start at T-6:15?
No. THe OTC asks for the hydraulic pressure recorders to start about T- 6:15 then once they are started he calls for the APU pre-start at T - 6 minutes. Sometimes the might do it a few seconds early but the timeline is T-6 minutes.
I've seen a couple of timelines and they had T-6:15... anyone has the S0007?
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#959
by
mkirk
on 01 Sep, 2007 14:42
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GLS - 1/9/2007 9:21 AM
AstroRJY - 1/9/2007 2:46 PM
GLS - 1/9/2007 8:10 AM
AstroRJY - 31/8/2007 2:49 AM
Trekkie I can tell you the calls right off the top of my head from watching dozens of launches, here ya go:
T-8 minutes: PLT take AC bus sensors to MONITOR. (1980s and 1990s)
T-7:45 (approxiamtely) PLT configure FUEL CELL/ ESSENTIAL BUS SOURCE switches
T-6 minutes PLT perform APU pre-start
T-5 minutes PLT perform APU start
T-5 minutes CDR reconfigure heaters (turn the orbiter's FLASH EVAPORATOR FEEDLINE heaters A and B to OFF)
T-2:30 PLT clear Caution/ Warning memory, verify no unexpected messages.
T- 2 minutes. Flight crew close and lock visors, open suit O2 valves.
All of these are from the OTC. And the network communicaiton format is "PLT, OTC perform.. " or "CDR, OTC perform..." , etc.
Isn't APU pre-start at T-6:15?
No. THe OTC asks for the hydraulic pressure recorders to start about T- 6:15 then once they are started he calls for the APU pre-start at T - 6 minutes. Sometimes the might do it a few seconds early but the timeline is T-6 minutes.
I've seen a couple of timelines and they had T-6:15... anyone has the S0007?
Per the Ascent Checklist and S0007 the APU Pre-Start is at T-6:15 by the clock. You may hear the actual call from OTC a little later but that is when it is planned for. The APU Pre-Start is not as time critical as the actual APU Start-Up procedure at T-5 minutes since it is mostly a check of switches and breakers that sholud already be in the proper configuration (only nine actual switch throws).
If the pilot is slow to get all 3 APUs up and running during the Start procedure the countdown clock could enter an unplanned hold at T-4:00. This is because the GLS performs a status check of various APU parameters (such as turbine speed and supply pressures) at T-4:05, if the status check is not passed then the clock will automatically enter a hold at the next GLS milestone which is T-4 minutes.
I believe this actually happened to Andy Allen on STS-46. Ooops!
Mark Kirkman
