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(NASA)   Final launch of Atlantis countdown proceeding as planned   (nasa.gov) divider line 404
    More: Cool, Atlantis, Space Shuttle Atlantis, Kennedy Space Center, overviews, launch windows, International Space Station, tendency, launch pads  
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4556 clicks; posted to Main » on 14 May 2010 at 11:02 AM (3 years ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



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2010-05-14 12:55:24 PM
bluorangefyre: If all goes according to plan on launch, and it lands perfectly, this will be the first time a shuttle makes its final launch and DOESN'T disintegrate.

True. Kinda cold but true.
 
2010-05-14 12:56:16 PM
bluorangefyre 2010-05-14 12:52:16 PM

Technically speaking since they don't have to worry about getting Atlantis back to Florida for another launch, they could land it anywhere and get away with it

Jesus another damn clown :-/
 
2010-05-14 12:58:36 PM
Not Cool.

Sad.

/The Stars look very different today.
 
2010-05-14 12:59:55 PM
Kittypie070: bluorangefyre 2010-05-14 12:52:16 PM

Technically speaking since they don't have to worry about getting Atlantis back to Florida for another launch, they could land it anywhere and get away with it

Jesus another damn clown :-/


ah, the idea of the shuttle landing at Dulles *is* kind of funny. I think the strip would be better. I suspect this was silliness not shenanigans. Possibly in poor taste, but that's fark.
 
2010-05-14 01:01:08 PM
vollmond: THIS is the final countdown

That.is.awesome.
 
2010-05-14 01:02:49 PM
Uchiha_Cycliste: ah, the idea of the shuttle landing at Dulles *is* kind of funny. I think the strip would be better. I suspect this was silliness not shenanigans. Possibly in poor taste, but that's fark.

While Dulles would be a poor choice, I'm pretty sure that in a pinch they can land at a lot of international airports. They'd prefer NOT to of course because none of their equipment would be there, but they could do it and could probably manage to get the shuttle carrier 747 to pick it up most anywhere.

Only thing I'm NOT sure about is what they'd do in the case of a TAL abort. I'm not sure they could get it back to the states on the 747, even with Reykjavik, Gandor, Halifax, etc. along the way. In its shuttle configuration it's range is only about 1000nm. They may need to use a container ship for that. I've always wondered what would happen.
 
X15
2010-05-14 01:03:33 PM
nekom: BZWingZero: It has to be refurbished and processed in case its needed for a rescue mission

Not if the last 2 flights are ISS missions.


Atlantis will be processed for a possible STS-135 Launch On Need flight to resupply the ISS should a shuttle crew have to take refuge there.

But even if she wasn't, she still has to go back to Kennedy for safeing and decommissioning.
 
2010-05-14 01:04:15 PM
Regnad Kcin: Regnad Kcin: Does anyone know how they light the solid-fuel boosters? Is there a little fuse at the bottom that you light with a Zippo and get away?

Answering my own question here:

SRB IGNITION

SRB ignition can occur only when a manual lock pin from each SRB safe and arm device has been removed. The ground crew removes the pin during prelaunch activities. At T minus five minutes, the SRB safe and arm device is rotated to the arm position. The solid rocket motor ignition commands are issued when the three SSMEs are at or above 90-percent rated thrust, no SSME fail and/or SRB ignition PIC low voltage is indicated and there are no holds from the LPS.
The solid rocket motor ignition commands are sent by the orbiter computers through the MECs to the safe and arm device NSDs in each SRB. A PIC single-channel capacitor discharge device controls the firing of each pyrotechnic device. Three signals must be present simultaneously for the PIC to generate the pyro firing output. These signals- arm, fire 1 and fire 2-originate in the orbiter general- purpose computers and are transmitted to the MECs. The MECs reformat them to 28-volt dc signals for the PICs. The arm signal charges the PIC capacitor to 40 volts dc (minimum of 20 volts dc).

The fire 2 commands cause the redundant NSDs to fire through a thin barrier seal down a flame tunnel. This ignites a pyro booster charge, which is retained in the safe and arm device behind a perforated plate. The booster charge ignites the propellant in the igniter initiator; and combustion products of this propellant ignite the solid rocket motor initiator, which fires down the length of the solid rocket motor igniting the solid rocket motor propellant.

The GPC launch sequence also controls certain critical main propulsion system valves and monitors the engine- ready indications from the SSMEs. The MPS start commands are issued by the onboard computers at T minus 6.6 seconds (staggered start- engine three, engine two, engine one- all approximately within 0.25 of a second), and the sequence monitors the thrust buildup of each engine. All three SSMEs must reach the required 90-percent thrust within three seconds; otherwise, an orderly shutdown is commanded and safing functions are initiated.

Normal thrust buildup to the required 90-percent thrust level will result in the SSMEs being commanded to the lift- off position at T minus three seconds as well as the fire 1 command being issued to arm the SRBs. At T minus three seconds, the vehicle base bending load modes are allowed to initialize (movement of approximately 25.5 inches measured at the tip of the external tank, with movement towards the external tank).

At T minus zero, the two SRBs are ignited, under command of the four onboard computers; separation of the four explosive bolts on each SRB is initiated (each bolt is 28 inches long and 3.5 inches in diameter); the two T-0 umbilicals (one on each side of the spacecraft) are retracted; the onboard master timing unit, event timer and mission event timers are started; the three SSMEs are at 100 percent; and the ground launch sequence is terminated.

The solid rocket motor thrust profile is tailored to reduce thrust during the maximum dynamic pressure region.



Those NASA folks love their acronyms, don't they? IF the MEC's don't arm the NAB, the PIC won't charge and the SNAFU will FUBAR the GD MF-ing thing.


Wait, then how did Jinx cause a "thermal curtain failure" and send Max into space?
 
2010-05-14 01:07:14 PM
Falcon Hunter: Uchiha_Cycliste: UTEP_Farker: Already have the NASA stream up and running, hopefully I'll be in between calls during the launch. Goodspeed, Atlantis!

/Working the tech support helpdesk... PEBKAC!

flag user Eye-Dee-ten-Tee

Wow...I'm apparently off by 3 minutes today.
/tech support as well.


...are you a wow GM/Billing/Tech rep :o I know they use that a lot.
 
2010-05-14 01:08:34 PM
WHY did they count down to "T minus 20" then "Hold for 10"?
 
2010-05-14 01:10:00 PM
RiverRat: WHY did they count down to "T minus 20" then "Hold for 10"?

iono, I was always told to puff it or pass it, not hold it for 10 minutes.
 
2010-05-14 01:10:14 PM
RiverRat: WHY did they count down to "T minus 20" then "Hold for 10"?

Holds are built in to the countdown, always have been. I'm not sure why but I'm sure they have a reason.
 
2010-05-14 01:10:34 PM
RiverRat: WHY did they count down to "T minus 20" then "Hold for 10"?

They have scheduled holds so they can run through checklists without being on a timer. It would be silly to say "You need to finish these checks between T minus 30 and T minus 20 otherwise you fark up the launch." Makes sure people do it right, rather than doing it quickly.
 
2010-05-14 01:10:53 PM
Uchiha_Cycliste 2010-05-14 12:59:55 PM
Kittypie070: bluorangefyre 2010-05-14 12:52:16 PM

Technically speaking since they don't have to worry about getting Atlantis back to Florida for another launch, they could land it anywhere and get away with it

Jesus another damn clown :-/

ah, the idea of the shuttle landing at Dulles *is* kind of funny. I think the strip would be better. I suspect this was silliness not shenanigans. Possibly in poor taste, but that's fark.


Sorry...I'm still a slight bit irritable from all this sand I've allegedly got stuck in a crevice according to the Mighty All-Knowing Holy Sacred Never to be Disagreed-with dipshiat99

Apologies to bluorangefyre
 
2010-05-14 01:11:08 PM
TemperedEdge: Approves...



/hot like ladder 49
//yes, that's Joaquin Phoenix


Anticipating a thermal curtain failure?

/Jinx put Max in space, biatches

//hottest Lea Thompson performance in that movie. Hubba Hubba.
///female pilots are teh hotnezz
 
2010-05-14 01:11:14 PM
Need to add: I've always assumed.
 
2010-05-14 01:13:23 PM
Thanks all

PJF Thanks, makes sense.
 
2010-05-14 01:13:30 PM
Kittypie070: Uchiha_Cycliste 2010-05-14 12:59:55 PM
Kittypie070: bluorangefyre 2010-05-14 12:52:16 PM

Technically speaking since they don't have to worry about getting Atlantis back to Florida for another launch, they could land it anywhere and get away with it

Jesus another damn clown :-/

ah, the idea of the shuttle landing at Dulles *is* kind of funny. I think the strip would be better. I suspect this was silliness not shenanigans. Possibly in poor taste, but that's fark.

Sorry...I'm still a slight bit irritable from all this sand I've allegedly got stuck in a crevice according to the Mighty All-Knowing Holy Sacred Never to be Disagreed-with dipshiat99

Apologies to bluorangefyre


That's why I popped back up, here:
have a catnip cookie =D t1.gstatic.com
 
2010-05-14 01:14:45 PM
Here's a fun piece of trivia that most people don't know: Why the water tower? What's it for? It's not for putting out fires, and you'd probably never guess if you didn't know its purpose.
 
2010-05-14 01:15:33 PM
nekom: Here's a fun piece of trivia that most people don't know: Why the water tower? What's it for? It's not for putting out fires, and you'd probably never guess if you didn't know its purpose.

I'd reckon to keep the launch pad from melting.
 
2010-05-14 01:16:24 PM
nekom

It's full of beer?
 
2010-05-14 01:17:02 PM
RiverRat: nekom

It's full of beer?


ooh, that's a much better answer.
 
2010-05-14 01:18:03 PM
Sound deadening?
 
2010-05-14 01:18:39 PM
I SAID SOUND DEADENING?

/sorry
 
2010-05-14 01:18:56 PM
nekom: Here's a fun piece of trivia that most people don't know: Why the water tower? What's it for? It's not for putting out fires, and you'd probably never guess if you didn't know its purpose.

Acoustic suppression?
 
2010-05-14 01:19:05 PM
WHAT?
 
2010-05-14 01:19:17 PM
Uchiha_Cycliste: nekom: Here's a fun piece of trivia that most people don't know: Why the water tower? What's it for? It's not for putting out fires, and you'd probably never guess if you didn't know its purpose.

I'd reckon to keep the launch pad from melting.


Close. It's to keep the launch pad from coming apart from the acoustics. The noise generated can actually rip concrete apart, so they lay the water down to get choppy and dissipate it or something.
 
2010-05-14 01:20:13 PM
lol @ dstanley

I SAID LOL!
 
2010-05-14 01:20:25 PM
thats ,um, that's a lot of f*cking energy.
 
2010-05-14 01:21:05 PM
*takes kittypie's cookie.
 
2010-05-14 01:21:45 PM
nekom: Close. It's to keep the launch pad from coming apart from the acoustics. The noise generated can actually rip concrete apart, so they lay the water down to get choppy and dissipate it or something.

You know, I've never heard that before, but it seems logical enough. Thanks for the trivia!
 
2010-05-14 01:21:54 PM
*runs crazily around room*
 
2010-05-14 01:22:37 PM
bad dstanley, bad
 
2010-05-14 01:23:32 PM
Uchiha_Cycliste: thats ,um, that's a lot of f*cking energy.

That's what SHE said.
 
2010-05-14 01:23:41 PM
Sound Suppression System (new window)

/can we use this on Justin Bieber?
 
2010-05-14 01:24:21 PM
Nekom is correct:

The white cloud on either side of pad 39B is steam, not smoke. The rocket blast hitting the ground would cause sound reflections that would damage the pad, destroy the orbiter, and likely break windows for up to 25 miles from the launch site. To solve this problem, NASA dumps water on the pad starting at about T-6, and running to about T+15. In those 21 seconds, they dump 300,000 gallons of water from a water tower, plus another 100,000 gallons of water in the piping. The rocket blast boils this water, causing the huge steam clouds.

Source (new window)
 
2010-05-14 01:24:57 PM
Oh I was wrong. It's to keep the sound from ECHOING and knocking tiles off.

From a Nasa page:

That's a relatively easy one. There are about 300,000 gallons of water. And if you look at the launch pad, or at some of the pictures we have of the launch pad. Just to the northeast you will see this huge water tower and in that water tower and in the huge piping that comes down from it, we have about 300,000 gallons of water. And at T minus 16 seconds we begin to flow the water underneath the launch pad. That's sound suppression water, in order to stop the echo of the engine ignition and going down and hitting the bottom of the pad then bouncing back and knocking tiles off the orbiter. So about 300,000 gallons of water will flow in 30 seconds. As the orbiter begins to lift off you may have seen in some slow-motion photos right at the pad deck there are these huge stand pipes. We call them rainbirds, and they begin to spray water all over the pad surface to cool and also to deaden the noise there as well.
 
2010-05-14 01:26:17 PM
RiverRat: Uchiha_Cycliste: thats ,um, that's a lot of f*cking energy.

That's what SHE said.


i613.photobucket.com
 
2010-05-14 01:26:22 PM
T-9 and final hold (40m)
 
2010-05-14 01:26:31 PM
(purringly eats Uchiha_Cycliste's catnip cookie in cutest manner possible)

nekom 2010-05-14 01:14:45 PM
Here's a fun piece of trivia that most people don't know: Why the water tower? What's it for? It's not for putting out fires, and you'd probably never guess if you didn't know its purpose.

It's where they stick libbynomore2 and two or
three severely stoned hippies to yell "Obamacare!!"
so she can provide sufficient flying spittle for the
Sound Suppression Water System.
 
2010-05-14 01:27:08 PM
dstanley: Sound Suppression System (new window)

/can we use this on Justin Bieber?


What the hell is a Justin Bieber?
 
2010-05-14 01:27:18 PM
www.auxportesdumetal.com
 
2010-05-14 01:27:22 PM
Nine minutes!

I love that the feed isn't blocked by my work filter.
 
2010-05-14 01:28:05 PM
I'm trying to look busy at work and alt-tabbing over to the NASA TV feed when no one is looking. I will have to turn the sound on for the actual launch, though. I'll just cough a lot and hope that covers it up.

My mom and dad are there for the launch today...so jealous.
 
2010-05-14 01:31:27 PM
*chases dstanley, screaming something about cookies*
 
2010-05-14 01:32:06 PM
Kittypie070: *chases dstanley, screaming something about cookies*

He tried to grab it, I didn't let him, that's why he ran around like crazy.
 
2010-05-14 01:34:27 PM
*whoops*
aaaaaaiiiiiiieeeeeeeeeeee!
*slides across slick floor, thumps into wall*
 
2010-05-14 01:35:00 PM
microlith

Humanity will expire on this rock if you have anything to do with it! Damn them for trying to escape the gravity well, we should spend more time pumping cash into large corporations who don't give a damn for actual scientific pursuits!

So Aerospace contractors and apparatchiks of a 50 year old NASA bureaucracy do care about science?

Space shuttle launches have an amortized cost of over a billion dollars. The Large Hadron Collider, which may actually teach us something about the universe, cost less than 6 shuttle flights. We've got a better chance of avoiding extinction "on this rock" by trying to understand how our world works and how to sustain our existence within it. Any parts of this task that need to be done in space can be performed by robots.

If you think sending handfuls of people into a lethal environment in which local delivery of provisions costs $15,000/lb will save humanity, then you need a plan B.
 
2010-05-14 01:36:12 PM
Are they going to hold the launch for a lost and found ball bearing?
 
2010-05-14 01:36:49 PM
ziponwheels: doubled99

But you're right, the creation of Silly Putty, Velcro, and
superglue are worth untold trillions.

Silly putty was the result of a WWII attempt to make synthetic rubber that was worthless in its intended role but found good application as a toy. Superglue was another WWII era discovery that got re-purposed into a useful product. Velcro was inspired by plant burrs. None of these things had anything to do with the manned space program. Even protein crystals supposedly grown on the ISS were grown in earthbound labs. The contributions of the manned space program to human knowledge, post Apollo, have been none.

The manned space program is not science. Its anti-science. It draws scientists and engineers away from working on more relevant than keeping hairless apes alive in flying tin cans. Doubled99 us actually giving the space program more credit than it deserves. All you haters who accuse him of being an ignoramus should read what a real scientist has to say about the manned space program, www.bobpark.org, before posting pictures of bug eyed dogs.


I've met Bob Park. He's a pompous douchebag who has been anti-NASA for the past 40 years (allegedly because he tried to get a job there and they told him to piss off). Nobody takes him seriously, except his brown-nosers at UMd.

Oh, and I suppose Hubble was going to fix itself and install its own upgrades?
 
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