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#720
by
ChrisGebhardt
on 01 Mar, 2008 20:12
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During the FRFs of the shuttle program, am I correct in assuming that the orbiter's were completely unmanned during these test firings?
If so, how were the APUs started if their start-up sequence is accomplished through the manual throwing of switches in the cockpit?
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#721
by
psloss
on 01 Mar, 2008 20:47
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Trekkie07 - 1/3/2008 4:12 PM
During the FRFs of the shuttle program, am I correct in assuming that the orbiter's were completely unmanned during these test firings?
If so, how were the APUs started if their start-up sequence is accomplished through the manual throwing of switches in the cockpit?
The final inspection team probably went out to the pad after stable replenish, but the pad was clear during the firing. I believe APU start was done remotely from the firing room for FRFs.
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#722
by
Jim
on 01 Mar, 2008 21:07
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I think ground hydraulic pressure was used, negating the need for the APU's
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#723
by
DaveS
on 01 Mar, 2008 21:31
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Jim - 1/3/2008 11:07 PM
I think ground hydraulic pressure was used, negating the need for the APU's
Actually, following Discovery's FRF prior to STS-41D they switched the APUs over from normal speed to high speed. So the orbiter's APUs was used.
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#724
by
psloss
on 01 Mar, 2008 22:37
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DaveS - 1/3/2008 5:31 PM
Actually, following Discovery's FRF prior to STS-41D they switched the APUs over from normal speed to high speed. So the orbiter's APUs was used.
They did the APU high-speed run on at least the first Challenger FRF, also.
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#725
by
Jim
on 01 Mar, 2008 23:22
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I am learning from this site too, thanks
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#726
by
jeff122670
on 02 Mar, 2008 00:39
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does anyone have any information on the STS-9 APU fire? is there a thread for this?
if so, can someone please post the thread. thanks!!
Jeff
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#727
by
Jim
on 02 Mar, 2008 01:07
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what info are looking for?
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#728
by
jeff122670
on 02 Mar, 2008 12:43
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pictures, info, details....standard "nasaspaceflight" info....ha.ha.
serioiusly, since there seems to be a link for everything, i figured there must be a thread for the STS-9 fire. i heard the aft compartment was heavily damaged....any pictures?
also, i remember when it landed, there was some smoke (not the standard APU chugging) coming from the aft end....
thanks
Jeff
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#729
by
kneecaps
on 02 Mar, 2008 13:22
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jeff122670 - 2/3/2008 1:43 PM
pictures, info, details....standard "nasaspaceflight" info....ha.ha.
serioiusly, since there seems to be a link for everything, i figured there must be a thread for the STS-9 fire. i heard the aft compartment was heavily damaged....any pictures?
also, i remember when it landed, there was some smoke (not the standard APU chugging) coming from the aft end....
thanks
Jeff
There is some info here on this John Young fansite here:
http://www.johnwyoung.org/sts9/sts9pg6.htmPretty alarming film clip of the landing.
The mission report probably has info, but I don't have a source for mission reports.
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#730
by
psloss
on 02 Mar, 2008 13:33
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kneecaps - 2/3/2008 9:22 AM
There is some info here on this John Young fansite here:
http://www.johnwyoung.org/sts9/sts9pg6.htm
Pretty alarming film clip of the landing.
The mission report probably has info, but I don't have a source for mission reports.
The film clip is just IR video of a "random" landing -- the drag chute is another giveaway that it's not STS-9. I half expected them to show an example of when the APU exhaust produces a visible flame; I believe it did on STS-9, but I'm not sure this is any different than other examples (STS-51, STS-97 launch) where the atmospheric conditions were conducive to that.
The fire was in the aft compartment and I'm not sure it was visible or noted in the NASA Select broadcast.
Probably the best public source on the failure(s) is the IFA list for STS-9:
http://www.jsc.nasa.gov/news/columbia/anomaly/STS9.pdfThe mission report is here:
http://members.aol.com/WSNTWOYOU/STS9MR.HTM
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#731
by
Jim
on 02 Mar, 2008 13:38
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kneecaps - 2/3/2008 9:22 AM
http://www.johnwyoung.org/sts9/sts9pg6.htm
Pretty alarming film clip of the landing.
The mission report probably has info, but I don't have a source for mission reports.
That is not STS-9 (drag chute is a give away)
and that is standard APU exhaust
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#732
by
kneecaps
on 02 Mar, 2008 14:46
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Jim - 2/3/2008 2:38 PM
kneecaps - 2/3/2008 9:22 AM
http://www.johnwyoung.org/sts9/sts9pg6.htm
Pretty alarming film clip of the landing.
The mission report probably has info, but I don't have a source for mission reports.
That is not STS-9 (drag chute is a give away)
and that is standard APU exhaust
Ahh....well spotted..I stopped watching before drag chute deploy. I've seen quite a few landings on IR and not noticed such 'flame' like exhaust before! It normally looks like 'puffing fumes' to me whereas that looked unusual (to me at least)
Also were they even fliming the landings in IR back then?
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#733
by
psloss
on 02 Mar, 2008 15:00
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kneecaps - 2/3/2008 10:46 AM
Ahh....well spotted..I stopped watching before drag chute deploy. I've seen quite a few landings on IR and not noticed such 'flame' like exhaust before! It normally looks like 'puffing fumes' to me whereas that looked unusual (to me at least)
Also were they even fliming the landings in IR back then?
STS-8 was of course the first night landing and IR video was a part of the live broadcast. STS-9 landed in the late afternoon; IIRC, they delayed landing after the GPC issues from the ascending node revs to the descending node ones.
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#734
by
TJL
on 03 Mar, 2008 22:48
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Is there much difference between the AMS that Congress is looking to have installed on ISS and the AMS unit that flew on STS-91?
Thanks.
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#735
by
Jim
on 04 Mar, 2008 02:01
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TJL - 3/3/2008 6:48 PM
Is there much difference between the AMS that Congress is looking to have installed on ISS and the AMS unit that flew on STS-91?
Thanks.
The one on STS-91 was a test unit
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#736
by
Lee Jay
on 05 Mar, 2008 14:12
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How are the Wing Leading Edge (WLE) sensors installed, including their data acquisition boxes and batteries? Is this done from outside the vehicle, or does someone climb inside each wing (or both)?
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#737
by
psloss
on 05 Mar, 2008 14:17
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Lee Jay - 5/3/2008 10:12 AM
How are the Wing Leading Edge (WLE) sensors installed, including their data acquisition boxes and batteries? Is this done from outside the vehicle, or does someone climb inside each wing (or both)?
Someone went into the wing to install the accelerometers on the WLE spars...there's video and I think a page on the web with pictures of that. Don't know the schematics for the wiring, but I'm sure someone else here does...I'll go see if I can find the web page...
Edit -- link:
http://www.nasa.gov/missions/shuttle/journal_nov.html
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#738
by
Lee Jay
on 05 Mar, 2008 14:40
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Thanks. So, the DAQ boxes and batteries are probably installed the same way, which explains why changing batteries at the pad is difficult if you don't have the ability to levitate.
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#739
by
Spad
on 06 Mar, 2008 00:21
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Good Evening All,
From an orbital dynamics perspective; How much difference is there between the lateral RPM maneuvers and the manuever that takes the orbitor entirely around the ISS.
Thanx
Spad
