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#140
by
spaceshuttle
on 16 Feb, 2007 01:52
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Probably just livery change like the meatball NASA logo (and things) that came later...
Experts, PLEASE correct me if i'm wrong.
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#141
by
TJL
on 16 Feb, 2007 02:02
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SCE2Aux - 15/2/2007 2:31 PM
I've noticed changes in the TPS on the wings of the orbiters. Could anyone tell me why it's different?
Those changes began on Discovery for the STS-82 HST repair mission.
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#142
by
Mark Dave
on 16 Feb, 2007 16:52
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Yep, then the logo change on the same orbiter with STS-95. I recall reading in material on Columbia's OMDP the flipper doors were changed from titanium to the new aluminum doors to save weight. Hence why they look different.
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#143
by
gordo
on 16 Feb, 2007 20:36
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When were the advanced SRM's shelved? They were to be be same length, but larger diameter with also only 3 sections.
Found a great NASA doco about them included on a 99p DVD from the local supermarket. I'm sure it will find its way onto the video collection pages
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#144
by
Mark Nguyen
on 16 Feb, 2007 21:40
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Are there any videos, diagrams, etc. that show how the payload is stransferred from the transfer vehicle at the pad, to rest in the payload bay itself? I understand that the canister is hoisted up into the RSS, which is then rotated into place, but what happens after that? I've always wanted to know how the payload is physically placed into the shuttle's bay, but have never been able to figure it out...
Mark
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#145
by
Mark Dave
on 16 Feb, 2007 22:47
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What's the name of the DVD on them?
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#146
by
DaveS
on 17 Feb, 2007 10:58
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#147
by
Jim
on 17 Feb, 2007 16:35
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Mark Nguyen - 16/2/2007 5:40 PM
Are there any videos, diagrams, etc. that show how the payload is stransferred from the transfer vehicle at the pad, to rest in the payload bay itself? I understand that the canister is hoisted up into the RSS, which is then rotated into place, but what happens after that? I've always wanted to know how the payload is physically placed into the shuttle's bay, but have never been able to figure it out...
Mark
The payload is removed from the canister by the PGHM (payload ground handling mechanism) which is in the PCR (payload changeout room) of the RSS.
After the payload is removed from the canister, the canister is lowered. The RSS rotates around the orbiter and the payload bay doors are opened to the PCR. The PGHM inserts the payload into the orbiter
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#148
by
nathan.moeller
on 19 Feb, 2007 01:20
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Can anyone tell me why the forward areas of Columbia's wings were black, while the same areas on the other four orbiters were white? I want to say it's some kind of TPS that was discovered to be unnecessary and changed on later vehicles, but please let me know.
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#149
by
Jim
on 19 Feb, 2007 01:54
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nathan.moeller - 18/2/2007 9:20 PM
Can anyone tell me why the forward areas of Columbia's wings were black, while the same areas on the other four orbiters were white? I want to say it's some kind of TPS that was discovered to be unnecessary and changed on later vehicles, but please let me know.
correct. It is the same black tiles as the rest of the vehicle. AFRSI was incorporated on OV-099
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#150
by
nathan.moeller
on 19 Feb, 2007 02:04
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Jim - 18/2/2007 8:54 PM
nathan.moeller - 18/2/2007 9:20 PM
Can anyone tell me why the forward areas of Columbia's wings were black, while the same areas on the other four orbiters were white? I want to say it's some kind of TPS that was discovered to be unnecessary and changed on later vehicles, but please let me know.
correct. It is the same black tiles as the rest of the vehicle. AFRSI was incorporated on OV-099
Thanks for the quick response Jim. Can you clarify what AFRSI stands for? I couldn't find it in the site acronyms.
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#151
by
Jorge
on 19 Feb, 2007 02:08
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nathan.moeller - 18/2/2007 9:04 PM
Jim - 18/2/2007 8:54 PM
nathan.moeller - 18/2/2007 9:20 PM
Can anyone tell me why the forward areas of Columbia's wings were black, while the same areas on the other four orbiters were white? I want to say it's some kind of TPS that was discovered to be unnecessary and changed on later vehicles, but please let me know.
correct. It is the same black tiles as the rest of the vehicle. AFRSI was incorporated on OV-099
Thanks for the quick response Jim. Can you clarify what AFRSI stands for? I couldn't find it in the site acronyms.
Advanced Flexible Reusable Surface Insulation.
--
JRF
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#152
by
Zpoxy
on 19 Feb, 2007 03:03
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Jim - 18/2/2007 9:54 PM
nathan.moeller - 18/2/2007 9:20 PM
Can anyone tell me why the forward areas of Columbia's wings were black, while the same areas on the other four orbiters were white? I want to say it's some kind of TPS that was discovered to be unnecessary and changed on later vehicles, but please let me know.
correct. It is the same black tiles as the rest of the vehicle. AFRSI was incorporated on OV-099
Sorry, not completely correct. Columbia's wing gloves were covered with a combination of LRSI (white tiles) and FRSI. The area Nathan asked about was painted with a black high-temp paint just before rollout from the OPF for STS-1 due to thermal concerns from the engineers. Over the years there were some HRSI (black tiles) added there but the majority of the area was still the black painted TPS.
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#153
by
rfoshaug
on 19 Feb, 2007 12:25
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I'm sorry if this has been asked earlier in the Shuttle Q&A threads, but here's my question:
At about T-12 seconds you can hear several high-pitched sounds, like something spooling up to speed, just before the spark-throwers start. What makes this sound? Is it the spark igniters we hear or could it be the turbopumps?
A good example of this sound is heard in this video:
http://youtube.com/watch?v=TH8Oq0PuIU8Thanks.
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#154
by
Jim
on 19 Feb, 2007 12:41
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It is not the turbopumps, they don't start untill T-6.6. It is the ROFI's
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#155
by
shuttlefan
on 19 Feb, 2007 12:51
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Jim - 19/2/2007 7:41 AM
It is not the turbopumps, they don't start untill T-6.6. It is the ROFI's
Jim, what are the ROFIs?
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#156
by
rfoshaug
on 19 Feb, 2007 12:52
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Thanks, Jim. That's what I thought.
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#157
by
Jim
on 19 Feb, 2007 13:01
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shuttlefan - 19/2/2007 8:51 AM
Jim - 19/2/2007 7:41 AM
It is not the turbopumps, they don't start untill T-6.6. It is the ROFI's
Jim, what are the ROFIs?
Radially Outward Firing Inititors
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#158
by
Mark Dave
on 19 Feb, 2007 17:23
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How come Columbia's forward fuselage was never modified with the AFRSI to replace the white tiles as o nthe other orbiters? I mean given how dirty the tiles looked, it seems like they'd have to be replaced.
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#159
by
Jim
on 19 Feb, 2007 17:41
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MarkD - 19/2/2007 1:23 PM
How come Columbia's forward fuselage was never modified with the AFRSI to replace the white tiles as o nthe other orbiters? I mean given how dirty the tiles looked, it seems like they'd have to be replaced.
Why? If it works, don't change it and waste money. Dirty? Only cosmetic and doesn't affect them. Just the effects of reentry on the waterproofing.
