NASA Releases Columbia Crew Survival Report 223
Migraineman writes "NASA has released a 400-page Columbia Crew Survival Investigation Report [16MB PDF.] If you're interested in a detailed examination and timeline of the events leading to the destruction of Columbia, this is well worth the time. The report includes a number of recommendations to increase survivability of future missions." Reader bezking points out CNN's story on the report, which says that problems with the astronauts' restraint systems were the ultimate cause of death for the seven astronauts on board.
ultimate reason for the astronauts death (Score:5, Insightful)
Is not the restraint systems. No restraint system could have saved them. The fact that their vehicle was disintegrating from burning up might have something to do with it.
Re:ultimate reason for the astronauts death (Score:5, Insightful)
dumbification (Score:5, Insightful)
The mainstream media once again lives up to its long history of mangling science stories.
The report cites 5 specific fatal aspects of the loss of Columbia: depressurization, extreme dynamic loads, separation of the crew from the vehicle, exposure to space, and ground impact. Implying that this really means inadequate restraint systems is a joke. No amount of safety hardware would permit surviving the breakup and uncontrolled re-entry of (pieces of) your spacecraft.
Due to NASA politics, the report omits a more accurate summary statement that the Shuttle is an inherently flawed and unsafe design when compared to ballistically stable capsules that can and do survive uncontrolled re-entry.
http://3.paulhamill.com
Pretty amazing forensics (Score:5, Insightful)
I am always amazed at the quality of forensics in cases like this, or aviation accidents and such.
I mean this thing exploded, or better yet disintegrated how many hundreds (thousands) of meters in the sky, scattered its debris all over BFE, and yet they can still piece together enough information to deduce who was unbuckled, who wasn't wearing gloves, and who didn't have their visors down.
Re:ultimate reason for the astronauts death (Score:5, Insightful)
That's one way of looking at it.
However, the actual cause of death was apparently trauma that would not have occured had the restraints been better designed / utilized, and that information is of practical value to future vehicles and missions. That's the whole point of the report.
That they would've died of another cause, doesn't change that they did die of the stated cause.
Re:Put the people in a "black box"! (Score:3, Insightful)
There's also the issue of cost. As it is, getting into orbit is damned expensive. Hardening the shuttle, or some part of it, so it can survive catastrophic re-entry, even if possible, would make manned spaceflight prohibitively expensive. The best solution we have even for the next generation of craft is basically a rescue mission, because there's no feasible way to repair something as integral as a heat shield while in orbit.
As sad as the loss of Columbia, Challenger, and all the other losses of life in the American and Russian programs are, the crews understood the risks, and took them. It's a dangerous trip, involving systems of incredible intricacy and energy, and you can only make them so resistant to failures.
But I will say one thing. I think the shuttles were an utter failure, a terrible engineering compromise between the original intention and what a combination of technological limits and Congressional pork barreling. We would have been much better off continuing from the Apollo programs, and putting off reusable vehicles until we were further down the road.
Re:I'm sorry (Score:2, Insightful)
Crew were incapacitated "within seconds" (Score:2, Insightful)
It appears that the pressure suits worn by the crew required user input to "configure the suit for full protection from loss of cabin pressure." Pardon my ignorance, but shouldn't a certain pressure be set as minimum survivable pressure, and a "dead-man switch" set to activate at that point? Not that it would have saved them, but though.
At least this means they died rapidly and for the most part without pain. Godspeed.
Re:ultimate reason for the astronauts death (Score:5, Insightful)
Spoilers.
The report doesn't list a cause of death, it lists five events which were sufficient to cause death, the first being cabin depressurization, and IIRC, the second was the restraint system failing to keep their upper bodies immobilized as the crew compartment tumbled, resulting in what would have been lethal injuries. For the pedantic, yes, the report implies they were alive when these injuries occurred because their circulatory systems were still functioning. I parse that to mean there was associated bleeding.
Thermal injury would, of course, have been fatal, but by the time they were exposed to re-entry heat, they were no longer breathing (no heat related injuries in the lungs).
The final potential lethal event was ground impact. And actually, if they'd been in pressurized suits AND the restraint system didn't fail, they'd have likely lived until the crew compartment disintegrated and they were exposed to reentry heat. As it was, they fell unconscious almost immediately after depressurization.
It's a fascinating report, with what I gather are the more graphic bits redacted. It's quite a thorough and professional job, and though it talks about seats and functions, there's always the awareness that you're reading the story of the final moments of real people, and that the whole point of the report is that we might do a better job of protecting our future astronauts.
Re:Sugar-coated death notice (Score:3, Insightful)
The claim that the initial "depressurization" would make the crew "incapacitated within seconds" relies on the common perception that exposure to the vacuum of space makes your face explode.
Spaceflightnow wouldn't buy into that. I suspect that the incapacitation was due to hypoxia.
What is a survival report? (Score:2, Insightful)
Jokes aside, why is it called "survival report"?
Re:Sugar-coated death notice (Score:2, Insightful)
Well said, RobertB-DC. Folks such as these people, military special forces, Everest climbers (the originals at least), etc. don't do what they do in hopes of dying a peaceful death. They recognize the likelihood of their fate and run straight to the edge. If they meet their fate, I have to think that they do so with a lot of 'fight' in them. In any case, they are...check that, were true pioneers.
Re:Extreme forceful asphyxiation (Score:3, Insightful)
At 63,000 feet MSL, all the gases dissolved in your blood boils. You die in seconds if exposed to rapid decompression.
In other words, my arteries and veins are wholly dependent upon atmospheric pressure to keep the gases in my blood from from boiling out as I type this?
Don't they have some structural integrity on their own? I would be surprised if they suddenly stopped working just because the surface pressure on my skin were removed.
Briefly surprised. Hopefully long enough to think "Hey, that AC was right! gurgle murgle blurgle..."
Re:Crew were incapacitated "within seconds" (Score:3, Insightful)
By "Configure the suit for full protection" that means put on the gloves and push down the visor. All of the controls are designed for a unsuited crewmember, the visor gets in the way and requires you to be on your oxygen system. And the oxygen system is pure O2 so you can't keep it running because there will be too much O2 and not enough N2 in the atmosphere of the shuttle.
So, no, there's no possibility for a dead-man's switch in the current design. But it's clearly something necessary in a future design. Even airline passengers are protected against depressurization and airliners are fairly safe.
Re:Pretty amazing forensics (Score:2, Insightful)
Not to sound like a 9/11 conspiracy theorist, but didn't they also supposedly find the passport of one of the suspects in the wreckage?
There's a fine line between pretty fucking cool and bullshit, IMHO. I know that saying that makes me sound like a conspiracy theorist, but I evade that label as I have no theory. I just think it's bullshit.
Re:ultimate reason for the astronauts death (Score:3, Insightful)
Yeah, this is a bit like driving your car off of a mile high cliff and saying that the restraint system is the reason you died... yeah... you know... that or the impact and the ensuing fireball.
You drove your car off a cliff. Moments before your car hit the ground, I plugged you right between the eyes with a sniper rifle. Your car hits the ground and creates a dramatic fireball. How did you die?
I believe you've missed the point (Score:3, Insightful)
There is no reason to design a retraint or any kind of protective system that would keep a person alive during that catastrophic breakup.
What they noticed is that the restraint system did not keep the astronauts alive during a situation where it could have.
What if there was an event that shook the cabin really hard, but was non-lethal? The current restraint systems would injure or kill the astronauts and turn a survivable event into a fatal one.
Having the best safety equipment is always the preferred option. A slim chance of survival is better than none.
Re:What? (Score:3, Insightful)
an important fact to consider when they build the shuttle's successor.
Does anyone think our government will ever actually accomplish building a successor to the shuttle? Take the best design you can come up with, multiply the cost by 100 and divide the quality by 100. That's what it would end up being.
We, as a society, have lost the ability to manage. The technical know-how may still be there, but the culture of arrested adolescence and unrelenting backstabbing and politics will paralyze the U.S. government and any other large undertaking in this society until we can re-learn how to be grown-ups again.
Re:Extreme forceful asphyxiation (Score:3, Insightful)
One thing that always amazes me, and that most people don't even understand is that the actual atmospheric air pressure difference between here on the ground and being in the "vacuum" of space, is only 14.7 teeny-tiny pounds per square inch.
Only? Atmopsheric pressure is comparable to the weight of a person on the palm of your hand. I'd call that pretty significant on the human scale.
Re:ultimate reason for the astronauts death (Score:2, Insightful)
Re:Pretty amazing forensics (Score:3, Insightful)
Re:ultimate reason for the astronauts death (Score:3, Insightful)
But to read the report, it sounds almost as if they want to fix the restraints, and change the pressure suit procedures... so they can suffer more??? I know, they're looking to make "slightly less catastrophic" incidents survivable.
Re:ultimate reason for the astronauts death (Score:3, Insightful)
Re:Russia is safer than US space program? (Score:3, Insightful)
Capsules are better than the shuttle, yes. Almost always have been, except for the few cases where you need to launch 40k+ lbs of payload AND 7 people all at once.
I'd mention quality control, but NASA hasn't exactly been immune to QC problems either.
As is usually the case, simpler = more reliable, and a capsule is far simpler than the shuttle.
Re:dumbification (Score:3, Insightful)
The thing about the Columbia disaster is Nasa management willfully ignored evidence that there might be a major problem. Unlike the Challenger explosion, the Columbia was intact after the initial problem arose and yet Nasa management refused to allow staff to gather data that would show whether or not the foam impact had caused any damage.
Management claimed that even had they known that there was a problem, there would not have been anything they could have done to save the crew. One thing that's true about Nasa's engineers is that they are amazingly creative. When Apollo 13's oxygen tank blew up, within a day, engineering came up with a hack that enabled the crew to use the co2 scrubbers on the LEM. It literally saved the astronaut's lives. Had engineering been given a chance to solve the problem of how to get the crew back safely, there's simply no way, a priori, to know whether engineering would have succeeded. And yet, management denied engineering the opportunity to attack the problem.
For the life of me, I don't understand why the managers who turned down requests to take a look at Columbia's heat shield weren't charged with criminal negligence. They failed to examine all the options that may have been available to save the astronauts. The astronauts died because Nasa management was bull headed.
Re:ultimate reason for the astronauts death (Score:4, Insightful)
NASA's position is going to be Hell Yes. If you can keep 'em alive a little longer through such a catastrophic failure, then you can probably also keep 'em alive longer through a less catastrophic failure.
They're going to be thinking, "Ok, what if some astronauts suddenly find themselves in a spin but they're not re-entering an atmosphere at the moment. Do we want their upper bodies to flop around until half their bones are broken, or do we want them pinned to their seats for a few seconds muttering, 'HAL, engage spin recovery' and then live happily ever after?"
The result being an edict handed down: put on your seat belts.
Re:ultimate reason for the astronauts death (Score:4, Insightful)
The real question is, would you really want to keep the crew alive through the early parts of such a catastrophic failure just so they could be burned to death a few minutes later? In other words, should NASA act on what they've discovered in this report, or should they just let things be and accept that when a spacecraft breaks up on reentry, the crew is going to die?
I've got another option: how about NASA not using a spacecraft that is required to violate its own design criteria in order to function.
In case you're unaware of it, Thermal Protection System (TPS) design criteria were that the tiles would not be exposed to debris impacts during launch. Since the very first launch of the Shuttle, tile dings have been recorded despite the fact that the tiles were never designed to deal with impacts. This should have sent up a huge red flag at NASA. For some engineers, it did. But the problem was the fundamentally flawed design of the entire Shuttle system, namely that of having the exposed TPS tiles alongside the External Tank (ET), which being full of liquid hydrogen and oxygen was guaranteed to produce ice debris. Since NASA accepted and built a known-flawed design, they couldn't "fix" it without scrapping the entire Shuttle system. Since that wasn't an option, NASA crossed its fingers and rolled the dice...again, and again, and again...until people died.
Thermal protection materials are, by their very nature, fragile materials. So long as our space program relies on either thermal tiles or ablative shielding, that re-entry system must be protected from damage during launch and spaceflight. The only way we can do that (with existing technology) is to put the crew module above anything that's likely to produce debris. We had that on Mercury, Gemini, and Apollo. We'll have it again for Ares or whatever the next administration decides to fund after the Shuttle is thankfully and deservedly retired.
Re:Put the people in a "black box"! (Score:2, Insightful)
And it was much harder to fly and land - so much so that it really "flies" more like a typical plane with its engine off.(read: like a brick).
Excuse me, but a typical airplane flies quite well with its engine off and is nothing like a brick. A commercial aircraft ran out of fuel in flight over Canada and flew 20+ miles to safely land at an abandoned airstrip.
A drastically lower weight, though, would also allow for a slightly slower speed. Likely closer to 2500-2800 F which would technically make the heat shielding a redundant safety feature, at least on the wings.(they would melt and distort, but wouldn't actually catch on fire.
If the wings melt and distort, they cease to be 'wings' and would render the shuttle uncontrollable.
Re:dumbification (Score:2, Insightful)
I don't think there's any hard data to support that allegation. Solid-fuel rockets are much simpler and thus more reliable (in general), albeit less efficient, than liquid-fuelled rockets, which makes them good candidates for the first stage.
With but one huge, glaring, ominous difference: solid-fueled rockets cannot be switched off or throttled once ignited, unlike liquid-fueled or solid/liquid hybrid designs. So, while solid boosters are simpler, they preclude any kind of escape system while they are firing. So, they're perfectly safe to use so long as they function perfectly, all the time, every time, for the entire duration of the launch. Such restrictions fly in the face of rationality.
I'd rather have a slightly more failure-prone booster that allows me to actually escape the failure compared to a "safer" design that, if it fails, guarantees loss of vehicle, mission, and crew. Stuff is going to fail, so you'd be better off with a design than anticipates and allows for that failure rather than one that strives to eliminate the possibility of failure. The former is achievable; the latter is impossible.