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Buzz Aldrin

Buzz Aldrin

Posted: November 9, 2009 04:56 PM

Why We Need Better Rockets

What's Your Reaction:

Well, it looked spectacular.

I'm referring to NASA's recent launch of the Ares 1-X, billed as the prototype of the Ares 1 as a crew launch vehicle, a fancy term for a manned space booster. The rocket is said to have performed as planned, and ushered in the era of the Ares rockets to replace the Space Shuttle next year. Only it won't. In fact, the much-hyped Ares 1-X was much ado about nothing.

Yes, the rocket that thundered aloft from NASA's Launch Pad 39B sure looked like an Ares 1. But that's where the resemblance stops. Turns out the solid booster was - literally - bought from the Space Shuttle program, since a five-segment booster being designed for Ares wasn't ready. So they put a fake can on top of the four-segmented motor to look like the real thing. Since the real Ares' upper stage rocket engine, called the J-2X wasn't ready either, they mounted a fake upper stage. No Orion capsule was ready, so - you guessed it - they mounted a fake capsule with a real-looking but fake escape rocket that wouldn't have worked if the booster had failed. Since the guidance system for Ares wasn't ready either they went and bought a unit from the Atlas rocket program and used it instead. Oh yes, the parachutes to recover the booster were the real thing -- and one of the three failed, causing the booster to slam into the ocean too fast and banging the thing up. So, why you might ask, if the whole machine was a bit of slight-of-hand rocketry did NASA bother to spend almost half a billion dollars (that's billion with a "b") in developing and launching the Ares 1-X?

The answer: politics.

Technical problems, the kind that follow every new rocket's development, have haunted the Ares like leftovers from Halloween. The rocket as currently designed shakes so much during launch that shock absorbers are needed beneath its capsule payload. All of this takes time to fix -- and money, money that NASA really doesn't have. To stave off critics, three years ago the Project Constellation managers conceived of the 1-X flight to supposedly show some progress. They could instrument the rocket with hundreds of sensors gathering information never before obtained during a booster use in a Shuttle mission. It would give the launch team some practice in the assembly of an Ares. And NASA would find out if something as ungainly as the Ares 1 design - a thicker top than the bottom booster - could survive during ascent through the Earth's atmosphere. Of course, all of the changes to the Shuttle launch pad to accommodate the Ares wouldn't be ready in time, so they decided to just leave all of the Shuttle hardware, such as the rotating tower that envelops the Shuttles there. A success might just buy more time for Ares to fix its problems.

And that's just what happened.

Meanwhile, the huge Ares V super booster is just a series of drawings. Unlike the plan used to send Neil Armstrong, Mike Collins and me to the Moon in 1969, whereby we used just one rocket to lift all of the elements of our Apollo spaceships, the current return-to-the-Moon plan requires not one rocket but two-one launch of an Ares 1 carrying the astronauts in the Orion capsule, and an Ares V lifting a big upper stage, a sort of space tug, and the lunar landing craft called Altair. Together, the two ships dock in orbit and then the tug, called the Earth Departure Stage, fires up for the outbound trip to the Moon. Two rockets in development; two launching systems. And two price tags. Two ways for failure to occur. Or delays to develop.

Worse yet, neither rocket alone can accomplish a deep space mission. And deep space, such as Mars is, as our friends in the recent Augustine report stated, our destination in space. These rockets were originally supposed to all be derivatives of the Space Shuttle-using four segment boosters and Shuttle engines - but the designs were changed to save money and development time. Neither of which has proven to be the case today. Our Augustine panel colleagues stated flatly that some new heavy lift rocket would be needed no matter which direction President Barack Obama chose for the space program. But Ares 1 is too small, barely able to lift the crew space capsule. And Ares V is too weak to boost all of the elements together.

What do we need? One rocket for all our deep space missions. Save the taxpayer's money by canceling the Ares 1 and V. And go "back to the future" in designing the big beast. So how do we get to the space station without Ares 1? Let the commercial space firms develop their own crew launchers, and crew vehicles. Why should Uncle Sam be in the people hauling business?

Here's my plan -- and yes, I am a rocket scientist -- cancel Ares 1 now and the version of the Orion capsule that is supposed to fly astronauts back and forth to the International Space Station. Instead, unleash the commercial sector by paying them for transportation services to the station. Could be capsules. Could be winged ships like the Space Shuttle, capable of flying back to a runway with its crews and cargoes, not splashing in the ocean like a cannonball. With the money saved, start developing a true heavy lifter worthy of the Saturn V's successor. Could be a side-mount rocket like the Shuttles, with a tank-and-booster set flanked by a payload pod jammed full of cargo-or a space capsule with astronauts in tow. Or new upper stages capable of deep space missions. Let's open 'er up to a true competition, with designs from inside -- and outside -- NASA. If we bypass a foolish Moon race and let the development of the Moon be an international affair, we will have time to refine the super booster to make sure it is compatible with our deep space goals, like missions flying by comets or asteroids -- or to the moons of Mars. Such a rocket would be ready when the time comes to colonize Mars. No more false starts and dead end rockets.

Maybe use innovative elements like new upper stage engines, or entirely new propulsion systems. Or designs truly evolved from the Shuttle era. The idea is to get the best thinking from rocketeers before we start spending Uncle Sam's space bucks.

I confess I have a design in mind that I and my team have worked on for years. It's called Aquila, and it is a true offspring of the Space Shuttle. It makes maximum use of the existing Shuttle infrastructure -- unlike the real Ares -- and Shuttle boosters, engines and the side-mounted design where today the winged orbiter rides into space. If we need bigger rocket engines, Boeing's RS-68 behemoth is always available, flight proven and flight tested aboard the Delta IV commercial launchers. You see, heavy lifting doesn't need to be heavy spending, if we do the job right.

But let the designers take the field-and may the best booster win. To paraphrase David Letterman, we don't need any stupid rocket tricks. Just good sound engineering. For without good new rockets to carry our payloads and crews, nobody is ever going to follow in Neil, Mike and my footsteps into deep space. And that's where we are destined to go.

 

Follow Buzz Aldrin on Twitter: www.twitter.com/therealbuzz

Well, it looked spectacular. I'm referring to NASA's recent launch of the Ares 1-X, billed as the prototype of the Ares 1 as a crew launch vehicle, a fancy term for a manned space booster. The rocke...
Well, it looked spectacular. I'm referring to NASA's recent launch of the Ares 1-X, billed as the prototype of the Ares 1 as a crew launch vehicle, a fancy term for a manned space booster. The rocke...
 
 
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08:01 PM on 11/24/2009
...The Ares relies on the SRB which has proven reliable. Just an extra segment that was already successful tested. Man-rating the RS-68 would easily cost several billion dollars. c) Now there are talks they might use the SSME engines for the first stage which are not only less powerful than the RS-68 but costs more than twice as much to manufacture and has many more parts. The upper stage seems underpowered as six RL-10B2s wouldn't be nearly as powerful as a J-2X. I can't see six RL-10B2s lugging the heavy Orion-Altair assembly to escape velocity. I have doubts the J-2X is powerful enough for the Ares V. It might need to be 15-20% more powerful.

While I have no real objection to private spaceflight I think a lot of the private space enthusiasts are putting the cart before the horse. Declaring NASA defunct and declaring the private sector king is very premature given that so far private space companies have only put a couple of pieces of equipment in space and are still years from putting a single man in orbit. The problem is that public interest is low and cash is far too scarce. Obama actually cut NASA's budget in the 2010 FY budget. At this rate they may not even be able to finish the shuttle on time. I suspect it is so he can clear up funding to fund his pet project of escalating the War in Afghanistan.
07:40 PM on 11/24/2009
3) Many of the "private" contractors credited with building some of NASA's stuff aren't actually that private. For instance JPL receives over 90% of its funds from the government. Same with many of the military contractors that build rocket parts. They receive quite a lot of funding from the government. SpaceX itself is receiving money from both NASA and a loan from the government.

4) While the DIRECT plan is definitely my second favorite plan (I still prefer Ares to DIRECT but I think it's the most likely backup if Ares falls through) I think it's enthusiastic (almost evangelical) proponents are as naively optimistic about it as NASA is about Ares. As it is DIRECT still seems underpowered for getting accomplished what it wants to do and it's not as flexible as the Ares for LEO missions. It's almost entirely dedicated to LLO missions. I doubt that it will be as cheap as its proponents claim for several reasons. a) The opportunity cost of stopping Ares at this relatively late juncture might take away from any cost savings DIRECT might have. b) While it uses a lot of proven technology it relies on man-rating the RS-68 engine. The RS-68 will require at least 200 changes to be safe for humans to ride on top of. Hence why man-rating the Delta IV would be just as expensive as Ares and possibly not as safe since the Delta IV rocket has never been used for manned missions......
07:26 PM on 11/24/2009
2) Three are trying to put humans in space: Bigelow Aerospace, SpaceShipOne's company (Mojave Aeorspace Ventures) and SpaceX. SpaceShipTwo is suborbital and SpaceShipThree won't be ready before 2017. Bigelow Aerospace has only put up two objects and hasn't put up anything in over a year. 2 1/2 years ago SpaceX claimed they would have a manned Dragon capsule in orbit by 2008. As of November 2009 they have only had two successful flights and only put 1 functional satellite in orbit. They're backlogged with significant cost overruns (making and flying rockets is turning out to be much more expensive and labor-intensive than they expected) and because of the recession there are many less customers. Less profit means less funds. Most SpaceX insiders are saying (not what their PR department claims, I'm talking about what actual engineers are realistically saying) the Falcon 9 rocket won't fly before Summer 2010 at the earliest and an unmanned Dragon capsule will probably not fly before 2011. There probably won't be manned Dragon missions before 2012 at the earliest. The Merlin engine designed for the Falcon rockets are running into trouble. The fifth Falcon 1 mission used a more powerful version of the Merlin than the others and the engine fried its nozzle much more than they expected it to - causing them to partially redesign the engine again. So far the Merlin engines in the Falcon 9 assembly aren't powerful enough yet to lift the Falcon 9 into orbit with a Dragon.
07:11 PM on 11/24/2009
While I greatly respect Mr. Aldrin (thank you for your service to the nation and humanity) I have to respectfully disagree with him on some things. Firstly I don't think the Ares I-X flight was as unimportant as he made it sound. The Ares I-X was significantly heavier than the Ares I vehicle will actually be. The dummy fifth segment was 40,000 lbs. heavier than the real fifth segment will be. The upper stage was also several thousand pounds heavier than the real Ares I upper stage. The engine itself was only 77 or 78% as powerful as it will be on the real Ares I. The rocket flew almost perfectly despite being significantly heavier and underpowered. Splashdown incidents with SRBs have happened many times over the years. Most recently with STS-128. I have to disagree with him about the vibrational load. While the computer simulator simulate the rocket shaking too much for humans in actual flight the sensors recorded that it only shook as much a normal Shuttle flight. Well within reasonable limits for astronauts. The thing didn't even turn much on its axis. The Roll Control System only pulsed 3 times during the flight. It flew far better than Ares/Constellation critics are alleging.

I also have to disagree with "unleash the private sector" slogan for several reasons.

1) There is currently little demand for private space flight right now. Only 4 or 5 American companies are even trying to put stuff in space.......
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LMPE
I connect the most dissimilar things
09:06 PM on 11/22/2009
Come to think of it, we've already walked on the moon (who hasn't seen the picture that Neil Armstrong took of you, Buzz?). I think that we can rest on our laurels.
03:04 AM on 11/19/2009
Until we do away with religion and money, humanity will never collectively do what it takes for any substantial travel of the solar system and beyond by humans. We hold ourselves back.

I am amazed by the amount of materials we extract and create from the earth. There apparently is a lot of it, but I doubt enough to sustain the inefficient method of chemical rockets.
05:53 AM on 11/23/2009
Boy did you ever put your foot in your mouth on that one..
Dr Aldrin just happened to be the first person to celebrate The Eucharist on the moon.
08:55 AM on 11/13/2009
Before thinking about lofting any more rockets into space, Buzz, we had better get a handle on, and start conserving, the finite resources here on Earth. The rising consumption curve is going to intersect with the depletion curve any time now, if it hasn't already. Because of this, if we keep going the way we are, depletion will keep us from massively converting to conservation and sustainability. And, considering the physics involved, no amount of increasing space consumption will garner sufficient resources from other bodies in space to make up the difference.
05:19 PM on 11/12/2009
We have the technology, the time is now, we must blow up the moon.
12:29 PM on 11/12/2009
I've been saying for years that NASA needs to be dismanted and privatized. There are too many pigs at the trough wasting taxpayer money continuusly providing antiquated technologs at grossly overpriced rates with no noticable advancement in rocket technology or any technology for that matter. It's pathetic how sub-par the space program has become.

The Russian's say they can build a nuclear powered craft for $650B by 2013. We can't build a replacement space shuttle with an Ares rocket for that price, primarily because of the $10,000 hammer issues from the same old contractors. It's a game of who's pockets are going to get lined, not the acheivement of real technological goals.

Sad.
11:32 AM on 11/19/2009
Riiiight. I have a time machine in my back yard, too, and I'm best friends with George Washington.

Instead of believing everything that's said, let's look at Russia's recent history. Did you know their Phobos Grunt mission was recently delayed because of technical problems? Or that their Anagara rocket, the successor to the Soyuz, was just delayed today because Russia has cut back funds for launch pad construction? If they can't complete ordinary projects on time without funding issues, you really think they can do this in four years? Spending 30 years of NASA's budget in just 4? C'mon.
06:12 AM on 11/23/2009
You must be a republican..they want to privatize everything
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GrumpyOldGeek
My micro-bio is empty
12:34 AM on 11/12/2009
Yep, it's politics, but from the viewpoint of an engineer. From the viewpoint of the politicians, it's a risk. The engineer doesn't get funding unless the politician approves of the engineering.

The problem is that the engineering thought process (or the scientific method, for that matter) is straightforward and verifiable. Political thought is an oxymoron to an engineer.

The politician needs to avoid risk. After all, something bad happened a while back. Might not get reelected.

This, of course, is a big insult to the engineering profession. So the engineer bites his tongue. A big, noisy, prototype with zillions of instruments on it is built. This will show the politician that the design is ok. The number will prove it.

But politicians don't do numbers. They make them up and assume that everyone else does, too.

The engineers don't get enough money, so they suggest that the risky things that scare the politicians, like the manned missions, should be offloaded to the private sector. That mitigates a lot of the fear from the politicians.

The politicians refuse to give money to the private sector. The private sector can't do it without a guarantee. So we're back where we started.
08:56 PM on 11/11/2009
NASA is like a dinosaur. It is like using incandescent bulbs instead of more efficient CFLs or even LED's or cold-cathode lights. It's propulsion systems are as ancient as and not much better than century's old Chinese firecrackers. NASA needs to be replaced by a precursor to StarFleet Academy. :-)

A question for Mr. Aldrin: How many folks are researching more exotic propulsion systems like ion, solar wind, magnetic, "warp drive", etc? What is the current status of such research?

Solar Sail: Planetary Society Plans Sunlight-Propelled Spacecraft
http://www.huffingtonpost.com/2009/11/10/solar-sail-planetary-soci_n_352087.html
11:43 AM on 11/19/2009
You mean like the VASMIR engine that NASA is helping to develop?

http://en.wikipedia.org/wiki/Variable_Specific_Impulse_Magnetoplasma_Rocket
06:21 AM on 11/23/2009
39 days to Mars sounds good to me:)
08:29 PM on 11/11/2009
If I understand correctly, the old Saturn rockets were quite good. It is not clear how the Ares is a superior design. Can somebody who has knowledge of these offer some insight?
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FerrisValyn
09:07 AM on 11/12/2009
Infrastructure for Saturn V no longer exists. We could rebuild it if we really needed to, but the amount of money involved would be a lot. More than NASA currently gets
05:55 AM on 11/23/2009
What Nasa currently gets is not enough to propel us anywhere except low Earth orbit
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StansDad
Guy who eats food
03:41 PM on 11/11/2009
F this noise, get the space elevator done. Screw the moon and mars, there's just rocks there. THe space elevator can make space and orbit cheap and space stations will become feasible and not 20 year bajillion dollar projects
04:54 PM on 11/11/2009
That would require a HUGE investment and techology that doesn't even exist yet, so... not today.
06:14 AM on 11/23/2009
Not possible now. May not be possible in the future either.
10:47 AM on 11/11/2009
the guy is a national icon but is way too obsessed with going to mars instead of the moon.

they are both good ideas. Just because we have been to the moon doesn't mean we shouldn't go back. And the moon would be a good place to test out the equipment that would be used to go to Mars.

And they didn't destroy the blueprints for the Saturn V, its all on microfilm.

Also, there is no rush. I know he probably wants to see a Mars mission before he dies but it probably won't happen.
01:09 PM on 11/11/2009
He doesn't want to go to Mars. He prefers the flexible path of the report of the Augustine Commission. That means to visit deep space locations like asteroids and lagrange points. Its more about getting some experience of travelling and living in deep space than to land in a permament location (like the moon or mars). Mars is the ultimate goal, but not in the near future.
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05:04 PM on 11/11/2009
Mars is the express goal of the Augustine Commission as well....but long term, not now. Which I believe is also Aldrin's view. Mars will only be in the lifetime of those under 20, imo.
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03:30 AM on 11/11/2009
I get the impression that the U.S.A. can't do anything right anymore.

We can't educate our kids.
We can't maintain, let alone fix, our infrastructure.
We can't talk to other nations to resolve differences, we prefer to bomb them, and then occupy them.
We can't rescue our own drowning people after a hurricane.
We encourage modern day pirates to destroy our mortgage, banking, and investment systems.
And, it looks like the glory days of the U.S. space program are in the past. Most recently, we have lost entire Space Shuttle crews because a chunk of ice knocked a hole in the heat shield during lift off, and because of a poorly designed O-ring system.
An engineer in Mexico told me that they have a saying down there, that NASA now stands for "Need Another Seven Astronauts."
05:57 AM on 11/23/2009
If we don't start to do something soon we won't have any jobs.
02:07 PM on 11/24/2009
The US *can* do stuff right. And we *do*. Just because we have a LOT of faults, that doesn't mean we don't have any positive traits and achievments, too.

Most of the stuff in your list is completely valid, but I completely disagree with your comment about the Shuttle. The shuttle is without a doubt the most complex piece of machinery ever designed by mankind, composed of tens of thousands of parts - the failure of any of which could be catastrophic. The shuttle fleet has completed over 150 flights and experienced only TWO catastrophic failures. These were tragedies and I'm not making light of them, but when you consider the unprecedented SUCCESSES of the shuttles' systems and compare them to the two failures, I think it's clear that the NASA community has built and flown an example of American know-how that easily eclipses anything done by any other country.

Yes, NASA needs a revamping for the 21st centrury (and Buzz's suggestions should be seriously considered as part of that process). But that doesn't mean that what they've done so far is crap.

And BTW, the "need another seven astronauts" joke was coined after the Challenger disaster. I heard it a lot here in the US, so I really doubt that it originated in Mexico. There are *some* things - tasteless humor being one - that the US hasn't yet outsourced.