Freedom Engineering in Space

A tongue-in-cheek Freedom Engineering poster encouraging space settlers to produce oxygen through plant growth as an alternative to dependency on centralized oxygen production facilities. Credits: Charles Cockell

At the 24th Annual International Mars Society Convention held October 14 – 17, Dr. Charles Cockell, professor of Astrobiology in the School of Physics and Astronomy at the University of Edinburgh, gave a talk on what he calls Freedom Engineering. His viewpoint was also published in a paper via the journal Space Policy in August of 2019. Cockell makes the case that due to the extreme constraints imposed by the laws of physics on living conditions in space settlements, freedom of movement will necessarily be restricted. Such conditions could be exploited by tyrannical governments to limit social, political and economic freedoms as well. To address these concerns Cockell suggests that colony designers utilize proactive engineering measures in planning off Earth communities to maximize liberty in the space environment. For example, rather then one centralized oxygen production facility or method that may be leveraged by a despot to control the population, it is suggested that settlements be designed with multiple facilities distributed widely and if possible, other types of oxygen production (e.g. greenhouses) be employed to minimize the chance of monopolization.

This engineering philosophy raised many questions among colleagues of mine so I reached out to Dr. Cockell for an interview via email to provide answers. He graciously agreed and I’m very grateful for his responses.

SSP: How is Freedom Engineering different from standard engineering practices of designing for redundancy to prevent single point failure?

CC: There is a strong overlap. For example, if you want redundancy, you multiply oxygen production. That would also be a desired objective to minimize the chances of monopolistic control over oxygen. So often the objectives are the same. However, I suggest that freedom engineering is a specific focus on engineering solutions that cannot be used to create coercive extraterrestrial regimes, which is not always the same as redundancy. For example, we might minimize the use of cameras and audio devices to monitor habitats for structural integrity, an objective consistent with general engineering demands, but potentially antithetical to human freedoms.

SSP: Since the added costs are significant and we may not be able to follow these practices initially, how do we get around the problems you mention after being on the Moon a decade or two? Wouldn’t the forces of tyranny have already won?

CC: Liberty is never cheap in resources and human effort. You can take a cost-cutting approach and hope that tyrannical regimes don’t take hold in a settlement or you can plan before hand to minimize their success, even if that involves more cost. However, as many freedom engineering solutions are compatible with redundancy, it is not necessarily the case that introducing measures like maximizing oxygen production and spacesuit manufacture motivated by considerations on liberty would add significantly to a cost already incurred by ensuring redundancy.

Liberty is never cheap in resources and human effort.

SSP: How do we avoid centralized control of transportation? Will we have two or more landing pads, several sets of rockets? – e.g., Musk, Bezos, and ULA?

CC: I would say that maximizing the number of entities with transportation capabilities is a good idea. Here too, we would want to achieve this for redundancy, but it would also reduce the chances of monopolization and the isolation of a settlement (particularly if leaving the settlement can only be achieved with one provider). This could also include multiplying the physical number of rocket launch and arrival points.

SSP: There are always non-redundant systems, which you acknowledge. At some level there are critical infrastructures that cannot be made redundant because then we get into an infinite loop. If a tyrannical power wanted to control everything on the Moon, for example, that is where they would focus their control. Can you comment?

CC: That’s true. It goes without saying that, as on Earth, a determined despot with enough support can find ways to take over a society. However, as the framers of the US Constitution understood, if you can introduce enough checks and balances you can make tyranny an outcome that requires many of those to fail. You reduce the risk. So by minimizing the number of single point controls in an extraterrestrial society you never eliminate the chances of tyranny, but you reduce the number of options open to those with tyrannical tendencies.

It goes without saying that, as on Earth, a determined despot with enough support can find ways to take over a society.

SSP: How would a tyrannical off-Earth settlement get its citizens when moving to such a settlement would seem like a terrible idea?

CC: It’s true that an overtly tyrannical settlement may eventually find it difficult to recruit people and might therefore fail. One might hope that this would be a feedback loop that would discourage tyranny in space. However, when building free government[s], it’s a good idea to assume the worse to achieve the best, i.e. assume that people will attempt to, and can, create a tyranny, and then build a system that minimizes this possibility. It’s also worth pointing out that once people are in a settlement, they will be physically isolated under some governance power. Just as it isn’t trivial to remove a tyranny on Earth that has a population corralled under it once it is established, it may not be easy to free a settlement once it has a population under its control. It is worthwhile to attempt to design societies that avoid this possibility from the beginning.

SSP: Would a space settlement economy with multiple competing companies providing essential needs such as life support, obviate the requirement for engineering redundancy since it would be more difficult for a tyrannical government to take over all the means of production?

CC: Yes, I think in many ways multiple competing companies is a form of redundancy – providing many conduits for production and minimizing single points of control or failure. Maximizing productive capacity is essential. I would mandate some basic level of oxygen production capability, for example, that any settlement must be capable of producing to keep people alive, and then try and stimulate a private market in fashionable oxygen machines of various kinds, different oxygen production methods etc. Of course, one should not be utopian. A coercive monopoly could still control a lot of this, but in general the more entities that produce vital resources, the more likely real choice can emerge in some form.

SSP: One reasonable measure that can be taken that doesn’t fall under normal engineering approaches is standardizing data transparency. It might make sense that it should be a matter of public record, and easily assessable, the records of who does what with vital resources and how activities that seriously impact human safety are managed. This can be done without compromising anyone’s intellectual property. The full light of day can be good protection especially when used proactively, and establishing such standards would head off the opportunity to wave things away as bias or smear campaigns. Open-source approaches to data are already a big thing for all the space agencies and may be the best course of action. Do you have an opinion on this philosophy?

CC: I think this is essential. The freedom engineering approach I suggest is just one mechanism for reducing coercive governance, but a free society is constructed from many other needs. In some of my previous papers I have discussed exactly this – the need for transparency in information about oxygen production, who is funding it, and how etc. A general culture of openness is necessary. There may be some novel approaches such electing members of the settlement by lot to take part in meetings to do with oxygen or water production, for instance, and write public reports. Corporations will find all this very annoying of course, but the wider culture of liberty will be enhanced by a very ‘leaky’ society with respect to information. Other essential things are a free press (even if that is just informal lunar or Martian newspapers), transparency in elections for running the settlement, and perhaps maximum terms on people involved in health and safety tasks to create fluidity in the network of officialdom that oversees the potentially large number of health and safety concerns with respect to radiation, dust, production of essential items.

Corporations will find all this very annoying of course, but the wider culture of liberty will be enhanced by a very ‘leaky’ society with respect to information.

Coming soon: the $10M orbital condominium

Living space in a Kalpana orbital space settlement. Credits: Bryan Versteeg

Kasper Kubica presents an optimistic business case for space tenants moving in (er, up) to deluxe condominiums orbiting the Earth within 10 years. Initially for the ultra rich, the price tag is comparable to high end real estate currently on the market. Of course the devil is in the details, so lets dive in.

In a post on Medium, Kubica uses the rotating habitat Kalpana as an illustrative example of his “Spacelife Direct” approach for an orbital settlement spinning to create 1G of artificial gravity and hosting north of 400 condominiums in LEO. Such a facility would be shielded from radiation by Earth’s magnetosphere if it were located in low equatorial orbit and therefore could be constructed with less shielding. This results in a significant reduction of mass driving costs way down. Running the numbers on this scenario opens up exciting possibilities with the amazing capabilities of Elon Musk’s Starship currently under development by SpaceX.

Using the scaled down Kalpana Two version as discussed in Tom Marotta and Al Globus’ book, The High Frontier, an Easier Way, the cylindrical habitat is sized at just over 100 meters in diameter and the same in length, weighing in at 16, 800 metric tons. Kubica estimates that it would take 140 launches to loft the required mass to LEO. Assuming costs keep coming down as Starship launch cadence increases (a safe bet), at $10M/launch the cost of just the materials to LEO would be $1.4B. Of course there are many more expenses associated with design, development and fabrication, not to mention insurance of such an orbital condo complex. For the sake of argument Kubica triples that figure arriving at a total price tag of $4.2B.

But would there be a market for real estate in LEO? Kubica provides comparable examples of skyscrapers with similar costs and over 200 condominiums recently selling for over $10M in Manhattan.

“The clamor for earthside luxury condos is massive and growing. Orbital condos — representing an exclusive experience far beyond that available to anyone on earth — could generate astronomical demand.”

With the economics of Starship opening up limitless possibilities, Kubica lays out a roadmap over the next 10 years to realize the Spacelife Direct opportunity. First would come financing the venture though a team of visionary entrepreneurs and investors (are you listening Dylan Taylor?). Design and development would come next including the robotic systems that would be required for assembly in space. Laying the groundwork for this infrastructure may be completed soon by Orbital Assembly Corporation which could potentially be leveraged as a Spacelife Direct supplier. To keep labor costs down much of the facility would be fabricated on Earth in launchable modules that would be assembled in orbit. The final stages would activate life support systems and finish out the interiors for the occupants to begin moving in.

So what about the rest of us? As history has shown in the aerospace industry at the beginning of the last century and we see unfolding in the space tourism market today, the rich help pave the way so that mass production and economies of scale will drive down costs eventually making space settlement affordable for the masses.

“We don’t want to live in space because it’s an economic necessity, we want to live in space because we are explorers and adventurers, and space is humanity’s next frontier!”

The emerging in-space manufacturing economy

Diagram depicting the market sectors of the nascent in-space economy. Credits: Erik Kulu / Factories in Space

Erik Kulu, a Senior Systems Engineer in the satellite industry, has a passion for emerging technologies…especially those in the in-space manufacturing field. He’s created the largest public database of companies active in the emerging in-space economy. Called Factories in Space, it tracks companies engaged in microgravity services, space resources, in-space transport services, the economies of LEO, cislunar space, the Moon and much more.

Kulu provides an overview of commercial microgravity applications for both terrestrial and in-space use. His listing and analysis of potential business ventures provides a comprehensive summary of unique profitable commodities manufactured in microgravity, including fiber optics, medical products, exotic materials and many more.

Breakdown of the in-space manufacturing sector of the space economy. Credits: Erik Kulu / Factories in Space

“This is the missing piece to speed up development for the exciting Star Trek-like future. I believe in-space manufacturing will be the kickstarter and foundation.”

In a recent industry survey examining the commercial landscape of space resources in 2021, Kulu renders a statistical breakdown of the currently evolving development stages of in-space manufacturing companies, levels of funding by market sector, timing of company founding and geographical location of the main players. His analysis shows a marked increase in the formation of companies from 2016 – 2018 dropping off over the last 3 years.

Prominent founding peak of space resource companies in 2018 with drop at end of the last decade. Credits: Erik Kulu / Factories in Space

I asked Kulu about what he thought caused the downward taper because it seemed to have started before the COVID-19 pandemic, and so was probably unrelated. He agreed, and offers this explanation:

“Primarily, I think the decline is a mix of following:

  1. There was a boom of some sorts, which has slowed down in terms of very new startups. Similar graphs [indicate the same trend] for nanosatellite, constellation and launcher companies. Funding boom is continuing though.
  2. As many of those space fields do not have obvious markets, some potential new actors might be in wait mode, because they want to see what happens financially and technically to existing companies.
  3. Startups could be in stealth mode or very early stage and as such I have not become aware of them yet. They will likely partially backfill.”

“While there was a decline, I forecast Starship and return to the Moon will kick off another wave in about 2-3 years.”

Kulu also tracks NewSpace commercial satellite constellations, small satellite rocket launchers and NewSpace funding options through his sister site NewSpace Index. But he doesn’t stop there. The world’s largest catalog of nanosatellites containing over 3200 nanosats and CubeSats can be found in his Nanosats database.

Learn more about how Erik Kulu got started tracking the in-space economy in this interview from earlier this year over on Filling Space. And be sure and tune in live to The Space Show next month when I cohost with David Livingston for his debut appearance, exact date to be determined. You can call the show and ask Erik questions directly. Check TSS Newsletter, updated weekly, for the show date once its set. This post will be updated when the schedule is finalized, so readers can check back here as well.

A lunar space elevator achievable with today’s technology

Conceptual depiction of a lunar space elevator. Credits: Cool Worlds Lab via YouTube.com

As SSP posted previously, a space elevator serving Earth holds great promise for reducing the cost of access to space but remains out of reach at least for a couple of decades as there are no existing materials strong enough to support their own weight in Earth’s gravity well. But a lunar space elevator (LSE) is possible with commercial polymers available today and could be built for about $2 billion according to Charles Radley, a Systems Engineer and AIAA Associate Fellow. In a paper available on Academia.edu he shows how a “… lunar elevator is both feasible and affordable, and indeed profitable.”

A functional LSE would require a tether of low mass material that is also strong enough to support its own weight in the Moon’s gravitational field. In addition, it needs to be robust enough to transport payloads reliably and repeatedly over the entire working distance in cislunar space. The LSE would be a very long tether extending from the Moon’s surface up to a station at the system’s center of mass (COM) located at either of two Earth-Moon Lagrange points, L1 or L2. The physics of the system requires that the tether extend beyond the COM terminating at a counterweight several thousand kilometers higher. For the L1 system, the tether extends about 58,000 km up from the Moon to the station at the COM and then extends another 220,000 km up (toward the Earth) to the counterweight.

Several high tensile strength, low mass polymers developed in the 1990s that fulfill the system requirements are commercially available in large quantities today (e.g. T1000TM, DyneemaTM and ZylonTM * ). A 48 ton system composed of the tether, the L1 COM station, a lunar surface attachment fixture (SAF), counterweight and payload climbers could be launched on a single Falcon Heavy vehicle.

Starting at L1, the deployment would begin with the counterweight and SAF simultaneously played out in opposite directions (up and down in relation to the Moon, respectively) unspooling the tethers at rates that maintains the COM station at the L1 position. Upon the SAF reaching the desired location on the Moon, it would be affixed to the surface by drilling down to a sufficient depth to anchor the structure such that it could adequately withstand tension and lateral forces.

When compared to chemical rocket operations on the moon, there is a significant cost reduction in lifting materials off the surface if multiple climbers are used and the frequency of their trips up and down the LSE is maximized. The cost reduction is on the order of 9X, enabling the system to pay for itself in one month. Radley concludes that:

“These large cost reductions are game changing and will enable major expansion of human activities beyond Earth orbit, and establish profitable lunar based industries.”

The Liftport Group, a collaborator on the paper, is administering The Alexandria Project, a database repository collecting and organizing questions about the infrastructure needed for development of an LSE toward creation of a requirements document.


* T1000G is a trademark of Toray Composite Materials America, Inc.; Dyneema is a trademark of Royal DSM NV; Zylon is a trademark of Toyobo Corporation