The Flight Director’s Nightmare

Ever since the Shuttle first started flying, and perhaps even before, I’ve often thought about a nightmare scenario. I’ve even thought about writing a SF short story, or even full-length novel about it, except that I can’t (intentionally) write fiction (though some would say that I do it often in my attempts to write non-fiction).

A Shuttle launches. Once they attain orbit, it is discovered that they have damage to the tiles that will not allow them to safely enter. In the real world as it existed in the early nineteen eighties, this would be a soul-torturing dilemma, and one that would likely be ultimately passed up to the President. Here’s the problem. The Shuttle doesn’t have enough consumables to last long enough to launch another one to rescue them. The Soviets might be persuaded to launch a couple Soyuz’s, but it’s not clear if they can do it in time, either, and there’s no way to dock them (though early on, they had the “rescue ball concept” for transfer).

But assume as a given that they cannot be rescued (which really did correspond to reality). They only have two choices. They can cross their fingers, pray, or do whatever non-technical things they wish to maximize their chances, and attempt to come home anyway, or they can run out of air on orbit (or choose some faster way to go), and the vehicle becomes a flying tomb, to be either repaired and retrieved later, or reenter in a few weeks. The ethical question, related to this post, is should we destroy the vehicle in a futile attempt to save the crew, or should we sacrifice the crew, who will die either way, and at least attempt to salvage the vehicle? How do the politics play? How does the public react? To make it more interesting, assume that there really is a credible capability to do such a repair and retrieval–that the vehicle really can be saved, and that the crew really cannot.

Now realize that we just averted this scenario in real life only because of the ignorance of Mission Control about the true situation. Is it possible that the tile damage was ignored partly out of (perhaps unconscious) wishful thinking, because the alternative to ignoring it was to face exactly that ethical dilemma and public-relations nightmare? The only difference is that the likelihood of repairing the Orbiter is small. But depending on the level of damage, it might have been larger than the prospects for a safe entry.

One more consideration. If this had been an ISS mission, the crew would likely be alive today, and wondering what to do with a broken orbiter. It’s likely that the damage would have been viewable, and even apparent, when approaching ISS, and the crew would have been able to use the station as a safe haven. But once they launched into an inclination different than that of ISS, if it turns out to be true that the tiles were fatally damaged on ascent, then their fate was sealed, as was their inability to know about it.

All of this, of course, points up the folly of the space policy that we have had in place for the past thirty years, in which we have a single, fragile, unresponsive system to get people to and from space.

The Flight Director’s Nightmare

Ever since the Shuttle first started flying, and perhaps even before, I’ve often thought about a nightmare scenario. I’ve even thought about writing a SF short story, or even full-length novel about it, except that I can’t (intentionally) write fiction (though some would say that I do it often in my attempts to write non-fiction).

A Shuttle launches. Once they attain orbit, it is discovered that they have damage to the tiles that will not allow them to safely enter. In the real world as it existed in the early nineteen eighties, this would be a soul-torturing dilemma, and one that would likely be ultimately passed up to the President. Here’s the problem. The Shuttle doesn’t have enough consumables to last long enough to launch another one to rescue them. The Soviets might be persuaded to launch a couple Soyuz’s, but it’s not clear if they can do it in time, either, and there’s no way to dock them (though early on, they had the “rescue ball concept” for transfer).

But assume as a given that they cannot be rescued (which really did correspond to reality). They only have two choices. They can cross their fingers, pray, or do whatever non-technical things they wish to maximize their chances, and attempt to come home anyway, or they can run out of air on orbit (or choose some faster way to go), and the vehicle becomes a flying tomb, to be either repaired and retrieved later, or reenter in a few weeks. The ethical question, related to this post, is should we destroy the vehicle in a futile attempt to save the crew, or should we sacrifice the crew, who will die either way, and at least attempt to salvage the vehicle? How do the politics play? How does the public react? To make it more interesting, assume that there really is a credible capability to do such a repair and retrieval–that the vehicle really can be saved, and that the crew really cannot.

Now realize that we just averted this scenario in real life only because of the ignorance of Mission Control about the true situation. Is it possible that the tile damage was ignored partly out of (perhaps unconscious) wishful thinking, because the alternative to ignoring it was to face exactly that ethical dilemma and public-relations nightmare? The only difference is that the likelihood of repairing the Orbiter is small. But depending on the level of damage, it might have been larger than the prospects for a safe entry.

One more consideration. If this had been an ISS mission, the crew would likely be alive today, and wondering what to do with a broken orbiter. It’s likely that the damage would have been viewable, and even apparent, when approaching ISS, and the crew would have been able to use the station as a safe haven. But once they launched into an inclination different than that of ISS, if it turns out to be true that the tiles were fatally damaged on ascent, then their fate was sealed, as was their inability to know about it.

All of this, of course, points up the folly of the space policy that we have had in place for the past thirty years, in which we have a single, fragile, unresponsive system to get people to and from space.

The Flight Director’s Nightmare

Ever since the Shuttle first started flying, and perhaps even before, I’ve often thought about a nightmare scenario. I’ve even thought about writing a SF short story, or even full-length novel about it, except that I can’t (intentionally) write fiction (though some would say that I do it often in my attempts to write non-fiction).

A Shuttle launches. Once they attain orbit, it is discovered that they have damage to the tiles that will not allow them to safely enter. In the real world as it existed in the early nineteen eighties, this would be a soul-torturing dilemma, and one that would likely be ultimately passed up to the President. Here’s the problem. The Shuttle doesn’t have enough consumables to last long enough to launch another one to rescue them. The Soviets might be persuaded to launch a couple Soyuz’s, but it’s not clear if they can do it in time, either, and there’s no way to dock them (though early on, they had the “rescue ball concept” for transfer).

But assume as a given that they cannot be rescued (which really did correspond to reality). They only have two choices. They can cross their fingers, pray, or do whatever non-technical things they wish to maximize their chances, and attempt to come home anyway, or they can run out of air on orbit (or choose some faster way to go), and the vehicle becomes a flying tomb, to be either repaired and retrieved later, or reenter in a few weeks. The ethical question, related to this post, is should we destroy the vehicle in a futile attempt to save the crew, or should we sacrifice the crew, who will die either way, and at least attempt to salvage the vehicle? How do the politics play? How does the public react? To make it more interesting, assume that there really is a credible capability to do such a repair and retrieval–that the vehicle really can be saved, and that the crew really cannot.

Now realize that we just averted this scenario in real life only because of the ignorance of Mission Control about the true situation. Is it possible that the tile damage was ignored partly out of (perhaps unconscious) wishful thinking, because the alternative to ignoring it was to face exactly that ethical dilemma and public-relations nightmare? The only difference is that the likelihood of repairing the Orbiter is small. But depending on the level of damage, it might have been larger than the prospects for a safe entry.

One more consideration. If this had been an ISS mission, the crew would likely be alive today, and wondering what to do with a broken orbiter. It’s likely that the damage would have been viewable, and even apparent, when approaching ISS, and the crew would have been able to use the station as a safe haven. But once they launched into an inclination different than that of ISS, if it turns out to be true that the tiles were fatally damaged on ascent, then their fate was sealed, as was their inability to know about it.

All of this, of course, points up the folly of the space policy that we have had in place for the past thirty years, in which we have a single, fragile, unresponsive system to get people to and from space.

Send In The Robots

Well, in some ways I’m glad that I was driving through Big Sur yesterday, instead of listening to the always-ignorant reporting on the latest space disaster. It probably saved my television screen. This morning, I wanted to throw something at Stephanopoulous, when he twice asked the idiotarian question, “is it time to retire the Shuttle and just let the robots do it?”

Do what, George? Do WHAT?

What are we trying to accomplish in space? That is the question that is never asked, and it’s the most important one. Everyone simply assumes that they know the answer, and that everyone else knows the answer as well, and that we are all in agreement–we know what we want to do in space (science and research) and the only question is whether it should be done with humans or robots.

If we finally, this time, get a serious discussion going about space policy in this country, for the first time in over forty years, then the loss of Columbia will be worth it, but based on what I’m already hearing from the idiot box, the prospects seem slim.

Hardware Over Humans

Let me preface this post, before I expand on yesterday’s apparent political incorrectness, by stating, for the record, that I am not a Vulcan. Nor am I an android. I’m not even a human being whose heart consists of a tiny grain of flinty stone, undetectable except with a scanning tunneling microscope.

I feel for the families and friends of those who lost their lives in yesterday’s catastrophe, just as I feel for the family and friends of anyone who suffers such a loss. What I don’t feel is a personal loss, as though they were my family or friend. I didn’t know them, and neither did ninety nine percent of the American public that now grieves their loss, until yesterday.

I do personally grieve the loss of the space shuttle orbiter Columbia, because I did know it. Very few people saw it both lift off from Florida, on its maiden flight, and land in California, back in May 1981. I’m one of them.

I worked many years for the company that built it. I helped do preliminary planning for some missions for it.

I also grieve its loss as a symbol of what we might be able to accomplish in space, given sensible national space policy (a commodity that continues to remain in short supply).

The crewmembers of that flight were each unique, and utterly irreplaceable to those who knew and loved them, and are devastated by their sudden absence from their lives, and to paraphrase what the president said after September 11, seven worlds were destroyed yesterday.

But, while this may sound callous, the space program will go on just fine without them. They knew their job was hazardous, they did it anyway, and by all accounts, they died doing what they wanted, and loved, to do. There are many more astronauts in the astronaut corps who, if a Shuttle was sitting on the pad tomorrow, fueled and ready to go, would eagerly strap themselves in and go, even with the inquiry still going on, because they know that it’s flown over a hundred times without burning up on entry, and they still like the odds. And if yesterday’s events made them suddenly timorous, there is a line of a hundred people eagerly waiting to replace each one that would quit, each more than competent and adequate to the task. America, and the idea of America, is an unending cornucopia of astronaut material.

When it comes to space, hardware matters, and currently useful space hardware is a very scarce commodity. People are optional. A Shuttle can get into orbit with no crew aboard. It could return that way as well, with some minor design modifications (actuators for nose-wheel steering and brakes, and gear deployment). But no one gets to space without transportation. Many of us would walk there if we could, but we can’t.

Yesterday, we lost a quarter of our Shuttle fleet. The next time we fly, we’ll be putting at risk a third of the remainder. If we lose that one, every flight thereafter will be risking half of America’s capability to put people into orbit.

So, when I grieve the loss of Columbia, it’s not because it was just a symbol. What I truly grieve is the loss of the capability that it not just represented, but possessed. That vehicle will never again deliver a payload or a human to space. It cost billions of dollars to build, and would cost many billions and several years to replace. That was the true loss yesterday, not the crew. I think that people realize this on some level, but feel uncomfortable in articulating it.

But I’ve always viewed space, and space policy, through a different lens than most people, as anyone who reads this weblog regularly has come to realize.

Why do people so uniquely mourn the loss of astronauts? Before the space program, before Mercury and the Right Stuff, the host of military test pilots that provided that first seven were killed on a regular basis in the exercise of their duties, and their funerals were attended by only family and friends, with little publicity. Something happened in 1960. As Wolfe pointed out, they became the gladiators of our age, in a (hopefully) bloodless competition on the high frontier against our enemy the Soviets. They became a symbol of our technological ability, and in order to win the propaganda battle, they had to leave the planet and return alive. The loss of the vehicles that delivered them to the heavens was insignificant, because they were designed to be thrown away after they served their purpose, once, but if we lost astronauts, it was a sign that we were losing the Cold War.

With the advent of the Shuttle, and even with the end of the Cold War, we retained the same sense that space symbolizes our nation’s might and prowess, in a way that an aircraft taking off does not. So, though they’ve become so seemingly routine that we no longer televise them, our national pride continues to ride with each flight.

But most of us are brought up to believe that “people are more important than things.” While true in some abstract philosophical sense, this notion often bumps up against reality–when we decide how strong to build a car door, when we put a dollar amount on the value of a human life for the purpose of determining the cost/benefit of government regulations, etc, but we still believe that there’s something unethical or unsavory in valuing inanimate objects, regardless of their ability to provide pleasure, sustenance, or life itself.

So when we are shocked by the loss of something so vital to our national psyche, and so seemingly useful to our ambitions for spaceflight, it is natural to transfer the mourning from the vehicle to its inhabitants.

I don’t. I forthrightly state that to me, it was the loss of the vehicle itself that was of the greatest importance, and that we have to build such vehicles to be more reliable, even if they are to never carry crew or passengers, because we cannot afford to lose them. That’s why the notion of “man-rating” a reusable launch system, or space transport, is so nonsensical. If it’s not reliable enough to operate economically, it’s not reliable enough to carry people. The operating economics will be the design driver to reliability, not the payload, regardless of the degree to which it’s considered valuable, or even invaluable.

And by that criterion (as well as others), Shuttle has always been a failure, in terms of its ultimate stated program goals of providing affordable, routine, safe access to space. There is plenty of blame to go around for this, but the seeds of that failure were planted in the constrained budget environment of its development thirty years ago, and it’s not something that can sensibly be fixed now, regardless of how many bandaids in the form of “Shuttle improvements” we attempt to put on it. We need new vehicles, and new approaches to developing them.

And one follow up from yesterday’s flamefest. I received this delightful email from a Douglas Cudd, from League City, TX (presumably a NASA employee or contractor):

Let me just say that I concur and would like to reiterate what Donald Sensing has said before. Also, let me say you don’t know what the hell you’re talking about. Maybe I’m a bit mad, or maybe it’s because I’ve been in the MCC since last night at 10, but let me just say that as much as I like to criticize NASA management, NOW IS NOT THE TIME when you have a f***ing body count, you heartless pile of s**t.

Columbia, OV102, was not the least valuable, as you put it, because it was oldest and heaviest. The Chandra observatory launched on STS-93 could not have been carried to orbit in any other vehicle OTHER THAN OV-102. And not outfitting it for ISS docking? That again made it perfectly suited for heavy, EDO equipped missions, like 107. It was, however planned to dock to the ISS during STS-118.

So, I don’t mind your idiotic, myopic rantings. But in the future, why not at least try to get your facts straight? Or are you one of those guys that got an Estes rocket when you were 12 and never grew up?

Well, I’m sorry that Douglas worked so late in the MCC, and as I said, my heart (I really do have one, honest) goes out to him and all of the people in Houston who did have a deep personal loss yesterday, in both humans and hardware. I’m not sure where I criticized NASA management yesterday. I don’t in fact think that they are responsible for what happened, at least not in the way they were seventeen years ago. As I said, what happened yesterday has been a long time coming (longer even than many of us expected back in the early eighties–it was always considered one of the most likely failure modes for a mission), and was a result of decisions forced by pinchpennies in Congress.

As to which orbiter is the most valuable, I would continue to contend that it’s easier to outfit one of the other vehicles for EDO than it would have been to put Columbia on a diet, and if some sadistic fiend put a gun to Ron Dittemore’s head and told him that he had to sacrifice an orbiter, Columbia is probably the one that he would have chosen, given the current priority of ISS support. But I’m willing to hear counter-arguments.

Not that it really matters, of course, since we did indeed have no choice. I was simply, perhaps inappropriately, in off-the-top-of-my-head comments in the immediate aftermath of the news, attempting to find a silver lining in a very dark cloud.

Back To LA

I got in, and was going to follow up on some of the comments from the most recent post, but I have to come up with an emergency Fox column instead, so I’ll just note that the Arab News, of all publications, actually had a gracious editorial about our tragic loss.

The immediate lesson remains, however, that this is a tragedy for everyone, not just the United States, India and Israel. We have all lost in this disaster. A technological challenge has been thrown down and once again, a warning given that in the unforgiving region of space, nothing can be taken for granted. The solutions may be a long time coming.

They will come. The struggle to conquer the space will go on. All that we can hope for is that, when the battle is won, the knowledge gained in the process will add to human happiness, not to human misery.

Credit where credit’s due, and thanks to them.

More posting tomorrow, as there’s much to discuss.

History Repeats

I know very little about what happened (even less than many of you, probably), because I just got up and heard the news. I got a phone call this morning from a friend on the east coast.

Like Challenger, this was not a survivable accident. There is no escape system in the Shuttle, for sound engineering reasons.

First my condolences to the friends and family of the crew, and to the nation of Israel, which has suffered so much during the past few years. It has to be a tremendous blow.

I hate to talk about good news/bad news in a situation like this, but let’s just say that it could have been worse.

In the “it could have been worse” category, of all the vehicles to use, Columbia was the least valuable, because it was the oldest in the fleet, and the heaviest. For this reason, it was rarely used for ISS missions, because its payload capability was much less (which is why it was being used for this non-ISS mission).

Also, at least the mission was completed before it happened.

Because it was the oldest bird, if it happened as a result of a simple structural failure (e.g., keel or spar), that would have been the most likely vehicle to which it would occur. On the other hand, that would only explain it if it were a consequence of age. If it’s cycle fatigue, I’d have to go look it up, but I don’t know if Columbia had more flights under its belt than the rest of the fleet.

WARNING: RAMPANT SPECULATION AHEAD

Here are the possibilities off the top of my head.

Terrorism: possible, but unlikely. If it were, it was a result of sabatoge–not being shot down. It would be difficult for us to take out such a target under those conditions (though the missile defense system under test could probably do it). No one else has such a capability, as far as I know. If it were sabatoge, it could have been something done to the vehicle before it left the ground, either a pressure-sensitive detonation (e.g., something that arms itself when it goes into vacuum, and then goes off when it senses atmospheric pressure again). This seems too sophisticated for Al Qaeda. It could also be simply sawing through the wing spar before the flight, because most of the stress on that member occurs during entry.

Failure of TPS: It could be that it lost some tiles during ascent–sometimes ice falls off the ET during launch, and it could have taken some out in a critical area, perhaps along the leading edge of the wings. Since this flight didn’t go to ISS, no one would have necessarily seen the damage from outside the Shuttle. This would result in burnthrough of a wing, which would quickly propagate through and then tear it off, after which the vehicle would break up from aerodynamic pressure.

I just heard the CNN announcer say that the airframe was “certified” for a hundred missions. Certification is not really the right word. “Designed to meet the requirement of” would be more accurate. Certification would imply that we had sufficient experience with such things to know that it was really capable of that, and we simply don’t.

Next theory, as I already mentioned would be structural failure due to age or cycles. I think that the primary structure is aluminum (though the spar and keel may be titanium–I don’t recall for sure). I wouldn’t think that this is a likely failure, but it’s certainly possible.

The last one I can think of (other than alien attack), would be a loss of the attitude control system (either the flight computers, or an RCS valve stuck open, or an actuator problem on a control surface) which would result in a bad orientation, which again could cause aerodynamic breakup.

OK, one more. Somehow the hypergolics in the OMS/RCS system mixed and caused an explosion.

All of these seem unlikely, but it’s probably one of them.

What does it mean for the program?

Like Challenger, it was not just a crew that “looked like America” (two women, one african american) but it also had the Israeli astronaut on board, which will have some resonance with the war.

Instead of happening just before the State of the Union, it occured three days after. It also occured two days before NASA’s budget plans were to be announced, including a replacement, or at least backup, for the Shuttle.

The fleet will certainly be grounded until they determine what happened, just as occurred in the Challenger situation. Hopefully it won’t be for almost three years. If it is, the ISS is in big trouble, and it means more money off to Russia to keep the station alive with Protons and Soyuz. The current crew can get back in the Soyuz that’s up there now. They will either do that, or stay up longer, and be resupplied by the Russians.

The entire NASA budget is now in a cocked hat, because we don’t know what the implications are until we know what happened. But it could mean an acceleration of the Orbital Space Plane program (I sincerely hope not, because I believe that this is entirely the wrong direction for the nation, and in fact a step backwards). What I hope that it means is an opportunity for some new and innovative ideas–not techically, but programmatically.

Once again, it demonstrates the fragility of our space transportation infrastructure, and the continuing folly of relying on a single means of getting people into space, and doing it so seldom. Until we increase our activity levels by orders of magnitude, we will continue to operate every flight as an experiment, and we will continue to spend hundreds of millions per flight, and we will continue to find it difficult to justify what we’re doing. We need to open up our thinking to radically new ways, both technically and institutionally, of approaching this new frontier.

Anyway, it’s a good opportunity to sit back and take stock of why the hell we have a manned space program, what we’re trying to accomplish, and what’s the best way to accomplish it, something that we haven’t done in forty years. For that reason, while the loss of the crew and their scientific results is indeed a tragedy, some good may ultimately come out of it.

I’m driving back down to LA today, but I’ll have some more thoughts this evening or tomorrow, particularly as more details emerge.

[Quick update before I leave, about 9:25 AM]

Someone in the comments section asks if the vehicle will be replaced. No, that’s not really possible-much of the tooling to build it is gone. It would cost many billions, and take years, and it’s not really needed at the current paltry flight rate. Assuming that they have confidence to fly again after they determine the cause, they’ll continue to operate with the three-vehicle fleet, until we come up with a more rational way of getting people into space, whatever that turns out to be. Unfortunately, because it’s a government program, I fear that the replacement(s) won’t necessarily be more rational…

[One more update at 9:49 AM PST]

Dale Amon has posted on this as well. To correct a couple of statements regarding me, however–I’m arriving in LA tonite–I’m leaving San Bruno this morning, and driving down.

And I never worked on the Shuttle directly. I worked for Rockwell, but in Downey, not Palmdale, and on advanced programs and Shuttle evolution, but not on the main Shuttle program itself.

[OK, one one more before hitting the road, at 10 AM]

Donald Sensing says in the comments:

I have read and respected this blog as long as I’ve been blogging. But today, Rand, I am sorry to say you blew it: “. . . but let’s just say that it could have been worse” and etc.

I just don’t give care about all that. This kind of “analysis” is not relevant at this point. It doesn’t matter. This is a human tragedy in which seven brave men and women violently died.

The social context of these deaths, and the publicly spectacular manner of their deaths, raise the tragedy beyond the personal to a different level. This sad event is a “meta-event,” whose significance is not quantitative (seven dead) but qualitative, striking close to the core of certain aspects of the American national identity. So it does not matter that Columbia was the oldest, or that its mission was completed (and the mission’s cost money wasn’t wasted) and all the rest. At least, it does not matter now, and it may not ever matter, even to NASA. The human scale of the tragedy far outweighs the technical scale.

Donald, thanks for the comments, but with all due respect, I disagree, and that kind of attitude is exactly why the manned space program has been such a disaster for so long. As long as we elevate the humans over the hardware, and emotions over rational discussion, we will never make significant progress in this frontier.

People die on frontiers, (and even in non-frontiers–more died in traffic accidents in the past twenty-four hours than have died in space since we first started going there) and if we can’t accept that, then we have no damned business being there.

I’ll expand on that in a post later this weekend. In fact, it may be the subject of a (perhaps coldhearted, to some) Fox column.