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#520
by
Paul Adams
on 25 May, 2009 13:31
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I noticed this too. When I saw it live, I wondered if there was a flat tire, but if it was we surely would have heard of it by now.
Also, when watching the replay, I see that there were several such puffs. Can't recall seeing that on previous landings.
Came here for this. Was wondering if ABS had gotten a little squirrely.
The puff right after the chute was cut loose was from the left main gear. I wonder if he was just on the brakes hard. There was a short balloon roughly at the threshold which may have placed the touchdown a little long.
I think it was healthy applications of the breaks for a couple of reasons; there was not a lot of runway remaining and the commander probably was applying quite a lot of breaking to stop her well short, and if you watch very closely as she rolled to a stop, you will see the nose come down from what appears to be a final healthy application of the breaks as she does stop.
Just my observations.
Paul
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#521
by
Jones36
on 25 May, 2009 14:58
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I would agree with Paul on this, just looks like hard braking action resulted in the smoke puffs.
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#522
by
Ronsmytheiii
on 25 May, 2009 15:06
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#523
by
DaveS
on 25 May, 2009 15:59
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This is the tracking page for N911NA, the STA currently at EDW and the one which will take Atlantis home:
http://flightaware.com/live/flight/NASA911
SCA, not STA. STA is modified Grumman GII. SCA is modified Boeing 747-100.
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#524
by
Ronsmytheiii
on 25 May, 2009 19:21
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This is the tracking page for N911NA, the STA currently at EDW and the one which will take Atlantis home:
http://flightaware.com/live/flight/NASA911
SCA, not STA. STA is modified Grumman GII. SCA is modified Boeing 747-100.
I know, just pushed T instead of C... typing problem not a knowledge problem
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#525
by
SpaceNutz SA
on 26 May, 2009 19:02
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Is the thread up yet for Mating and Ferry Flight back to KSC?
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#526
by
psloss
on 26 May, 2009 19:29
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#527
by
ChrisC
on 26 May, 2009 20:29
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I noticed this too. When I saw it live, I wondered if there was a flat tire, but if it was we surely would have heard of it by now. Also, when watching the replay, I see that there were several such puffs. Can't recall seeing that on previous landings.
Came here for this. Was wondering if ABS had gotten a little squirrely.
And if you watch the replays closely, including the PPOV/HUD view, you can see that the orbiter wandered left and right slightly as she rolled out. I'm sure I'll get smacked down with "that's normal" but I don't think it was, and I think the ABS did indeed act up. Perhaps we'll hear something interesting about braking performance soon.
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#528
by
Chris Bergin
on 26 May, 2009 21:36
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Is the thread up yet for Mating and Ferry Flight back to KSC?
Couple of hours. Wanted to kick it off with a decent processing update. That's upcoming shortly.
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#529
by
Paul Adams
on 26 May, 2009 21:40
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I noticed this too. When I saw it live, I wondered if there was a flat tire, but if it was we surely would have heard of it by now. Also, when watching the replay, I see that there were several such puffs. Can't recall seeing that on previous landings.
Came here for this. Was wondering if ABS had gotten a little squirrely.
And if you watch the replays closely, including the PPOV/HUD view, you can see that the orbiter wandered left and right slightly as she rolled out. I'm sure I'll get smacked down with "that's normal" but I don't think it was, and I think the ABS did indeed act up. Perhaps we'll hear something interesting about braking performance soon.
No 'smack down' necessary at all. My own obsevation that it looked like normal breaking to me is just that - an observation. Yours are just as valid, and like you, I had not seen the puffs of smoke before on roll out.
Paul
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#530
by
StarStuff
on 26 May, 2009 23:49
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It looked like they landed long, main landing gear touching at about 5000 feet down the runway. I checked a video from an earlier KSC landing that was 2000 feet shorter and the Edwards runway is the same length. Maybe that explains why you saw so much tire smoke.
What is landing distance supposed to be?
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#531
by
rfoshaug
on 27 May, 2009 08:43
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Does anyone know how much runway was left when Atlantis stopped? Surely it was a lot more now than on the mission that landed on the temporary runway at EDW (when the commander and capcom even commented that they used all of it).
On this landing it didn't seem to be that critical to get the orbiter stopped fast.
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#532
by
chksix
on 27 May, 2009 14:30
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Could be differential braking to augment the nosewheel steering maybe?
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#533
by
StarStuff
on 27 May, 2009 17:35
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Nominal landing is 2,500 to 2,700 feet beyond the threshold. Edwards does not have a displaced threshold. So they were definitely long.
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#534
by
rfoshaug
on 28 May, 2009 08:40
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