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#1920
by
wjbarnett
on 16 May, 2011 22:47
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During today's STS-134 launch, specifically during the MCC-H replay at ~16:40
after throttling down to keep max of 3G and approaching MECO, there's a "henning up" call from either BOOSTER or FIDO. What does this mean?
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#1921
by
Mark Dave
on 16 May, 2011 22:55
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Is there any photos or vide of an ET reentry? I saw a bit of one on a dvd I got of the shuttle program and it shows the ET explode during entry. It comes in like usual, bits peeling off then it explodes with fragments going all over the place.
Also in this video someone posted, do the SMEs always bend as they power up? Watch the center engine.
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#1922
by
Jim
on 17 May, 2011 01:03
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Yes, they always flex
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#1923
by
Jorge
on 17 May, 2011 08:06
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During today's STS-134 launch, specifically during the MCC-H replay at ~16:40
after throttling down to keep max of 3G and approaching MECO, there's a "henning up" call from either BOOSTER or FIDO. What does this mean?
"Handing up" comm to TDRS (note the timing with respect to the previous TDRS call).
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#1924
by
psloss
on 17 May, 2011 08:39
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During today's STS-134 launch, specifically during the MCC-H replay at ~16:40 [grl=http://www.youtube.com/watch?v=2fuaIEYEiLI&feature=share]here[/gurl]
after throttling down to keep max of 3G and approaching MECO, there's a "henning up" call from either BOOSTER or FIDO. What does this mean?
"Handing up" comm to TDRS (note the timing with respect to the previous TDRS call).
To (possibly) add, that's Ground Control (GC) making those calls (30 seconds to TDRS, handing up, on TDRS).
I haven't had a chance to watch the whole video, but from the parts I saw, you can hear the earlier calls for the different sources (like the MILA call I heard).
(Crippled the url for paging.)
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#1925
by
elmarko
on 17 May, 2011 10:58
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To answer previous page's question, Air to Air is UHF, I thought?
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#1926
by
wjbarnett
on 17 May, 2011 11:32
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During today's STS-134 launch, specifically during the MCC-H replay at ~16:40
after throttling down to keep max of 3G and approaching MECO, there's a "henning up" call from either BOOSTER or FIDO. What does this mean?
"Handing up" comm to TDRS (note the timing with respect to the previous TDRS call).
To (possibly) add, that's Ground Control (GC) making those calls (30 seconds to TDRS, handing up, on TDRS).
I haven't had a chance to watch the whole video, but from the parts I saw, you can hear the earlier calls for the different sources (like the MILA call I heard).
Thanks Jorge & Phillip - I mis-interpreted what was said and from whom. "Handing up" from GC makes sense.
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#1927
by
Jason1701
on 17 May, 2011 19:05
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Why do the shuttles have their flaps deployed while rolling over to the VAB?
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#1928
by
Jim
on 17 May, 2011 19:19
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Why do the shuttles have their flaps deployed while rolling over to the VAB?
Not flaps but elevons. They are down because there is no hydraulic power.
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#1929
by
iskyfly
on 17 May, 2011 19:31
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STS-134 Ascent Team video;
At 1:28 - "Drop any non essential displays at this time"
Who said that (it doesnt appear to be FD) and what does it mean?
also shortly after;
"GC - enable FIDO and I early"
?
Finally;
After lift-off do the launch controllers have any required monitoring to do where in they might see something that requires their contribution to decision making during ascent?
Thanks
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#1930
by
Jim
on 17 May, 2011 19:32
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After lift-off do the launch controllers have any required monitoring to do where in they might see something that requires their contribution to decision making during ascent?
They are involved with safing the pad and they don't see flight telemetry
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#1931
by
PahTo
on 17 May, 2011 19:44
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To add to Jim's response: the "bend" is referred to as start-up transients. This is why you'll hear "main engines moved to the start position". Start position has the engines spread apart to avoid nozzles hitting each other at start-up. And of course start position is different than liftoff (as seen by the engines gimballing after start-up).
Edit: I should add that this is one of the things I'll miss most when shuttle retires. Having the liquid engines sitting up high where they can be seen through start-up and gimbal to lift-off position is unique in the rocket world--all other rockets (that I know of/have seen) have the engines buried in the launch pad infrastructure so we don't get such great views of this highly dynamic and exciting time.
Also in this video someone posted, do the SMEs always bend as they power up? Watch the center engine.
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#1932
by
ChrisGebhardt
on 17 May, 2011 20:05
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After lift-off do the launch controllers have any required monitoring to do where in they might see something that requires their contribution to decision making during ascent?
They are involved with safing the pad and they don't see flight telemetry
To add a little bit here, my understanding is that while we say control of the vehicle is handed off from the LCC to MCC at Launch Tower clear (~T+7secs), the reality is that MCC has control the moment the SRBs ignite.
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#1933
by
Mark Dave
on 17 May, 2011 22:45
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I heard something happened to one of the SMEs during STS-134's launch. What was the issue? I missed the press conference that mentioned it.
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#1934
by
Rocket Science
on 17 May, 2011 23:00
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I heard something happened to one of the SMEs during STS-134's launch. What was the issue? I missed the press conference that mentioned it.
Q: Main engine sensor issue ? (Chris G)
A: It was on a sensor on low pressure fuel turbo pump B channel. It dropped off for a few milliseconds. So the computer threw it out. Its used for an internal calculation for internal flow through turbo pump. If both sensors failed they have a default flow rate value to fall back to.
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#1935
by
psloss
on 18 May, 2011 04:57
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I heard something happened to one of the SMEs during STS-134's launch. What was the issue? I missed the press conference that mentioned it.
Q: Main engine sensor issue ? (Chris G)
A: It was on a sensor on low pressure fuel turbo pump B channel. It dropped off for a few milliseconds. So the computer threw it out. Its used for an internal calculation for internal flow through turbo pump. If both sensors failed they have a default flow rate value to fall back to.
Couple of notes to add:
More details in the latest story:
http://www.nasaspaceflight.com/2011/05/endeavour-outstanding-shape-iss-for-docking/And the call itself is in the video that NASA posted that was taken in the Shuttle flight control room before and during the ascent.
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#1936
by
baldusi
on 18 May, 2011 16:16
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Yes, they always flex
Was it called a resonant nozzle? Or was the chamber? I remember that the RD-0120 had a completely different nozzle that might have been implemented for a possible RS-25E?
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#1937
by
Fequalsma
on 18 May, 2011 22:28
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Nozzles going through their normal (as in, structural dynamic "normal") modes as the engines come up to speed.
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#1938
by
PeterAlt
on 18 May, 2011 22:30
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What is the current plan on what the fate will be for the two remaining MLPMs? Will they be reused for SLS, go to a museum, or is it undecided?
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#1939
by
Jorge
on 19 May, 2011 01:05
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STS-134 Ascent Team video;
At 1:28 - "Drop any non essential displays at this time"
Who said that (it doesnt appear to be FD) and what does it mean?
It was GC. Some of the legacy displays on the MCC workstations are bandwidth hogs so during critical periods use of these displays is limited to those controllers that really need them.
also shortly after;
"GC - enable FIDO and I early"
?
Abort request pushbutton, which illuminates a light in the cockpit that the crew uses as one cue for an abort.