Category Archives: Space

Bootstrapping The Solar System

A new paper:

Advances in robotics and additive manufacturing have become game-changing for the prospects of space industry. It has become feasible to bootstrap a self-sustaining, self-expanding industry at reasonably low cost. Simple modeling was developed to identify the main parameters of successful bootstrapping. This indicates that bootstrapping can be achieved with as little as 12 metric tons (MT) landed on the Moon during a period of about 20 years. The equipment will be teleoperated and then transitioned to full autonomy so the industry can spread to the asteroid belt and beyond. The strategy begins with a sub-replicating system and evolves it toward full self-sustainability (full closure) via an in situ technology spiral. The industry grows exponentially due to the free real estate, energy, and material resources of space. The mass of industrial assets at the end of bootstrapping will be 156 MT with 60 humanoid robots, or as high as 40,000 MT with as many as 100,000 humanoid robots if faster manufacturing is supported by launching a total of 41 MT to the Moon. Within another few decades with no further investment, it can have millions of times the industrial capacity of the United States. Modeling over wide parameter ranges indicates this is reasonable, but further analysis is needed. This industry promises to revolutionize the human condition.

Looks interesting. I remember talks like this at the Princeton conferences 35 years ago. It’s technology is finally starting to evolve to allow it to happen.

Related: Carlos Entrena Utrilla has started a series of descriptions of the coming cislunar economy.

[Update a few minutes later]

Sorry for missing link on Carlos’s piece, fixed now.

The Abandoned Frontier

Mark Steyn reflects on the passing of John Glenn. I don’t agree entirely, and I think he misses some key points, one of which was that Apollo was a battle in the Cold War that didn’t have much to do with space. With regard to Charlton, anyone who thinks we’re in technological decline, and unable to do great things any more hasn’t been paying attention to what’s been happening in microelectronics, microbiology, and yes, spaceflight. I’d suggest that Mark read my recent essay on the need to get over Apolloism.

[Update a while later]

Henry Vanderbilt weighs in over at Arocket:

Apollo was amazing, yes. But it did things the brute-force, massively-expensive way. Just look at the size of a Saturn 5 ready for liftoff, versus how much came back. Multiply that by the size of the payroll for the hundreds of thousands building and operating it, spread over a handful of missions a year. That’s a lot of expensive aerospace talent and hardware spent on every mission – billions worth.

Of course, they had no choice but to do it that way. They had an urgent national goal, a tight deadline, an effectively unlimited budget – and a 1962 technology base. One example: The computer that flew a Saturn 5 weighed as much as a small car – and was less powerful than the chips we put in toasters.

Two things happened after Apollo, one immediately bad, one eventually good.

The bad thing is that in the seventies, bureaucrats took over, and did what bureaucrats do: They carved into stone doing things the Apollo way. Shuttle resulted: gorgeous, yes, but only somewhat less expendable and slightly less labor-intensive than Saturn 5. And, alas, somewhat more fragile.

For decades this bureaucracy defended their billions-per-mission turf and defeated all efforts to do things less expensively. (In fact it’s still trying, with a MANY-billions-per-mission bastard offspring of Shuttle and Saturn 5 called “Space Launch System”.)

But the other thing that happened is, back in the eighties a few of us saw this bureaucratic logjam forming, and looked into whether space really had to cost billions per mission. We concluded it didn’t. We began pushing the different approaches it’d take to get costs down to where all the useful things we might do in space begin to be affordable.

It took a lot longer than we hoped getting into this. But thirty years later, commercial space companies are doing things at a tenth of traditional NASA costs. And that’s even before the really radical new technologies kick in, like the reusable flyback boosters just entering test in the last couple of years.

I won’t defend the wasted decades. (It wasn’t us wasting them, though at a number of points we could have been less naive about how ruthlessly the bureaucrats would defend their turf.)

But at this point, despair over the wasted decades is obsolete. Costs are coming down fast, huge possibilities are opening up. We could still blow it, yes. But compared to even just five or ten years ago, right now the future’s so bright I gotta wear shades.

Henry Vanderbilt
Space Access Society
(founded in 1992 with the intent of being no longer needed and disposed of in five years. yeah well.)

As I said on the Space Show the other week, the future for human spaceflight has never been more exciting.

John Glenn

Farewell to a war hero, and hero of the early space age. The last of the Mercury Seven has gone to the stars. In the interest of de mortuis nil nisi bonum, I’ll ignore his political career for now.

[Update Friday morning]

One of John Glenn’s last acts was to praise reusable rockets.

[Update a while later]

[Update late morning]

NASA’s Mars “Plan”

Anatoly Zak has a report on Gerstenmeier’s recent announcement.

I’d say it’s more a delusional long-term vision than a plan. As I quoted Dale Skran in my anti-Apolloist screed from last summer:

…the NRC report is based on the unstated assumption that over the entire period considered, all the way out to 2054, there will be essentially no progress in rocketry other than that funded by NASA exploration programs, and that for the entire period the SLS as currently envisioned will remain the preferred method for Americans to reach space. It is difficult to imagine a more unlikely foundation for the planning of future space efforts than this. [Emphasis added]

And yet NASA continues to do so, because it has no choice, because Congress refuses to let it do it sensibly.

They are proposing a 20+ year plan. As I’ve noted in the past, even Mao never tried for more than five. Think back to 1996. Who would have predicted that, twenty years later, we’d have Internet billionaires building and flying vertical reusable launch systems? Or plans for private space facilities? Or the beginning of assembly of large structures in space? The notion that any plan for human exploration of the solar system that NASA has will survive contact with technical and budgetary reality of the next twenty years is ludicrous. But Apolloism marches on.