Category Archives: Space

Carbon Nanotubes

This looks like it would make a useful material for an electrodynamic tether:

Working with Teijin Aramid, the Rice group has now made carbon-nanotube fibers that have more of the properties of individual nanotubes. They have an electrical conductivity close to copper’s, but are much stronger. They’re not quite as strong as conventional carbon fibers, but they’re much less brittle. And they’re more thermally conductive than metal or carbon fiber. That means nanotube fibers could replace these materials in existing applications in aerospace and electronics, and enable new technologies that take advantage of the fibers’ unique combination of strength, flexibility, and thermal and electrical conductivity. Pasquali envisions washable electronic textiles, lightweight wiring for planes, and eventually, more efficient wires for the electrical grid.

Cool.

More ASAP Thoughts

I’ve been reading the report, and this (partial) graf jumped out at me:

Before NASA crew or personnel on NASA-sponsored missions will be allowed to fly on commercially provided spacecraft, the systems will need to be certified. NASA is still refining the details of the certification process, but as part of the recently awarded Commercial Crew Integrated Capability (CCiCap) Space Act Agreements (SAAs), the partners were asked to provide NASA with recommendations for what they believe it would take to complete a certification milestone, including an “option” to conduct an orbital flight-test demonstration (demo) — under the SAA (outside of a NASA contract) — with a non-NASA crew. Although there is plenty of precedent for contractor test flights in government aviation developments, such flights are always under the certification authority of the government (either the contracting agency, Federal Aviation Administration [FAA], or both). For this NASA option, the demo flight would be outside of NASA’s acquisition authority, thus raising several safety-relevant questions: (1) Would the SAA partner’s demo flight be conducted outside of NASA’s launch and entry certification authority? (2) To the extent that the required FAA license would not cover crew safety systems and procedures (FAA authority is limited by statute), would any other government agency step in to certify flight crew safety? (3) If not, would NASA be legally obligated to certify for crew safety? (4) If the answers to (1) through (3) leave a gap in government crew safety certification, would Agency stake-holders perceive NASA as irresponsible in its sponsorship/facilitation or tacit acceptance of a high-risk activity? [Emphasis added]

Note the unstated assumptions in the questions. For instance, there is an assumption that it is a federal responsibility to ensure passenger safety in private spaceflight. There is currently no such responsibility, statutorily. Let me answer the questions for the panel, under current law.

1) Yes.
2) No.
3) No.
4) Maybe.

The latter is a political question, but it strikes to the core of what I’m talking about in my book. “Agency stake-holders” is an ill-defined term, and certainly not a formal one. I presume they mean primarily Congress, but perhaps they mean the American people as well. If it is not NASA personnel involved, it truly is none of NASA’s business if SpaceX or Boeing want to risk their own employees. In any case, we need to discuss this, and that discussion should be happening now.

[Update a few minutes later]

Whoa! They’re singing my tune:

Space transportation, like all other modes of transportation, involves risk. In 2009, the most recent year for which data is available, 547 people lost their lives in aviation accidents, most of which involved general aviation aircraft. Accidents related to trains and railroad systems killed 695 people. Recreational boating claimed the lives of 736 participants. On our nation’s highways, we experienced 33,868 fatalities involving cars, trucks, buses, and motorcycles. It is not very realistic to assume that space transportation will be able to eliminate accidents completely, no matter how much emphasis we place on safety and mission assurance.

NASA must to do a better job of helping its stakeholders, which include senior political leadership,the news media, and the general public, to understand and manage expectations about the risks and benefits (the value) involved in human spaceflight. As Congress itself pointed out in the Commercial Space Launch Amendments Act of 2004, “spaceflight is inherently risky.” Spaceflight will never, in the foreseeable future, be truly routine, nor will it ever be “safe” when that word is used in the context of our everyday life. Discussions of risk without concomitant discussions of the associated value to be gained are superficial, misleading, and do not permit those involved to arrive at a well reasoned judgment concerning the appropriateness in undertaking this risk. The ASAP recommends that NASA clearly and consistently communicate the hazards involved, their risk of occurrence, and why the value of the goals to be realized warrant taking such risks. This practice will enable the programs to better pursue innovative paths forward to achieve safe, reliable, and cost effective space transportation.

At its heart, the reticence to discuss problems is exacerbated by a failure to proactively explain the risk versus reward—in other words, the net value of the undertaking. It is not surprising that without a clear mission whose importance is understood and is explicitly articulated, stakeholders would be less likely to support an activity which is perceived as having problems without any countervailing benefits that offset the risks. NASA should develop a focused strategic communication plan covering priorities, risks, costs, and benefits. [Emphasis added]

From the conclusion of the book:

NASA must establish a finite value for an astronaut’s life. In practice, the amount cannot be infinite, since the agency has a finite budget and finds it necessary to get things done occasionally. If there is a political obligation to pretend that it is infinite, this means that honest discussion of safety tradeoffs and priorities is forbidden. This actively increases risk, because, as we saw with the Ares I program, it essentially guarantees that money and effort will be allocated haphazardly, rather than being focused on the most serious problems.

It’s almost like they read the book already.

The ASAP Report

The Aerospace Safety Advisory Panel has come out with its annual report, much of which deals with commercial crew, and Clark Lindsey has some concerns. I share them, and may update the book to include this.

[Update a while later]

Here’s one statement in the ASAP report with which I strongly concur:

In the view of the ASAP, it is time for all stakeholders to reach a consensus on what the Nation is attempting to accomplish in human spaceflight and then fund that effort adequately and consistently.

And we’re a long way off from such a consensus.

Selling The Senate Launch System

One of the many problems with SLS has been that there were no missions defined for it. One of its contractors, Boeing, has accordingly decided to define some lunar exploration architectures that utilize it. Of course, they don’t have any comparisons with the much cheaper alternatives that don’t. If I were SpaceX (or ULA, though for political reasons they probably can’t), I’d be putting some together.

[Update early afternoon]

Now that I think about it, Golden Spike has already done it.

Dreamliner Electrical Issues

This has implications for space transports. Even during the Shuttle program, we were always trying to figure out how to upgrade to electromechanical actuators, not only to save weight, but to eliminate the Auxiliary Power Unit that drove the hydraulics, whose hypergolic propellants made it a pain to service between flights. Modern vehicles will want to go this route, with the advances in battery and actuator technology, but there will probably be lessons learned from Boeing’s 787 travails.

New CSF Members

I just got a press release from the Commercial Spaceflight Federation. The big news is that Boeing has finally joined:

The Boeing Company: Boeing Space Exploration division, headquartered in Houston, is at the forefront of development of new spacecraft systems, as it has been since the beginning of the Space Age. For more than 50 years, Boeing has designed, developed, built, and operated human and robotic space vehicles as well as supporting hardware: from the X-15 to Gemini, Mercury, Apollo, Skylab, Space Shuttle, the International Space Station (ISS), Commercial Crew Development and the Space Launch System. NASA’s Commercial Crew initiative is providing a unique opportunity for Boeing to accelerate development of its Commercial Crew Transportation System (CCTS) that will provide a domestic capability for crew to access the International Space Station.

“We are proud to join the Commercial Space Federation and help support the stimulation of this exciting new market”, said John Mulholland, Vice President and Program Manager, Boeing Commercial Crew Program. “We believe that our unique combination of commercial aviation and legacy human spaceflight experience will be beneficial to the community as we move forward.”

Paragon Space Development Corporation: Paragon is the premier provider of environmental controls for extreme and hazardous environments. Paragon SDC designs, builds, tests and operates premier life support systems and leading thermal control products for astronauts, contaminated water divers, and other extreme environment explorers, as well as for unmanned space and terrestrial applications.

Joining as Associate Members are:

Firestar Technologies: Firestar Technologies is a research and development company funded through both government grants and private investment. The firm has a rich intellectual property portfolio including NOFBXTM “green” propulsion, SonicExhaustTM aftermarket exhaust technology, and several developments in power conversion and next generation renewable energy technologies.

Golden Spike Company: Golden Spike plans to provide complete, turn-key commercial human lunar expeditions to countries, corporations, and individuals. The company is conducting lunar architecture and systems design studies with leading aerospace companies, and will be taking flight reservations and entering into vehicle development and flight contracts in the near future.

Spaceflight Services: Spaceflight is a one-stop shop that rapidly manifests, certifies and integrates secondary payloads on a suite of established and emerging launch and space transportation vehicles. Published commercial pricing reduces project planning and budgeting risks, and having a single point of contact simplifies integration efforts by enabling customers to plan to standardized processes while retaining access to multiple launch opportunities. Spaceflight has launch contracts to fly secondary payloads on several launch vehicles.

That’s funny, I had thought that Paragon was already on board. Perhaps they just upgraded?

Expanding ISS

I’d gotten a heads up about this over the holidays, but now it’s official:

  • This new funded contract follows an unfunded agreement signed in 2011 under which Bigelow has worked on various “procedures and protocols for adding BEAM to the space station”.
  • As indicated above, the module would be delivered to the station by either a SpaceX Falcon 9 or Orbital Antares rocket.
  • BEAM would provide extra storage while also providing data and experience for both Bigelow and NASA on installing and using a module with a non-metal structure in a working space station environment.

It doesn’t sound like it will create more habitable volume, in terms of allowing bigger crews, but it will provide valuable experience, and allow more useful expansion later.