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Archive for May, 2007

Norwegian Sounding Rocket Pictures

The aforementioned sounding rocket project I worked at while in New Orleans a couple of years ago has its own website (hosted at the And?ya Rocket Range site), with some slick pictures of the hardware: Hybrid Technology Rocket Campaign.

Here’s some pictures of the parts I was responsible for designing: the liquid oxygen tank, intertank structure (crammed with valves and tubing — and note what appear to be friction-stir welds at each end by the radax joints), payload adapter structure (with the forward attachment to the launch rail and holes for ground electronics), and the top-level assembly, minus science payload (and yes, it really is as skinny as it looks). And here’s Joe and Mike with the completed, painted, ready-to-fly rocket on the launch rail.

It’s amazing how much like the Catia V5 “render with material” views the real hardware actually looks. The intertank structure in particular is exactly how I pictured it, with all those rivets and bolt holes around the access panels.

Unfortunately, there’s no pictures yet of the launch itself. And I’m still eagerly awaiting a copy of the DVD of the launch video.

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Success!

This is too cool: NAMMO successfully launches Hybrid Test Rocket from And?ya:

[T]he Norwegian based company Nammo Raufoss successfully launched a 10 meter long hybrid test rocket from And?ya Rocket Range in Norway.The propulsion system of the hybrid rocket was based on solid fuel and liquid oxygen.

The Hybrid Test Rocket (HTR) was developed, manufactured and assembled by Nammo Raufoss in Norway. The rocket motor, tank and valve system and the mobile Ground Support Equipment (GSE) have been designed by Nammo in cooperation with LOCKHEED MARTIN (LM) Michoud Operations, New Orleans, USA.

Got it on the first try.

This was the last project I worked on before moving from New Orleans to Denver, and easily the most fun project I’ve worked on so far (though it was rather trying in some respects at the time). I was responsible for the LOx tank, the intertank structure, and the payload adapter structure, along with configuration management/space control and the development of various software tools in Catia V5 to support the design effort. (That’s not to brag – or not too much: there were only seven people on the project, so we all had to wear multiple hats.)

The article is a little off on the dimensions, though: the rocket was actually 10″ in diameter by 40 feet in length (not including the ~4-foot payload). Skinnier than a pencil, in other words.

I can hardly wait to see the launch video — I hear it’s spectacular.

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Inside Looking Out

Reading this is just…weird. I guess I’m not accustomed to seeing a news (or news-like) report on the fruits of my own job. It’s also a little weird to see reported as “news” changes which are six to twelve months old…it’s deja vu-inducing.

But what made me laugh out loud was this:

New detailed cutaway drawings of the CM are also included. These drawings show the CM consumables stored in a ring around the bottom of the capsule, and the packing of the parachute above the pressurized volume of the spacecraft. The CM sports a large 6-seat interior and a docking tunnel through the nose.

Although this CM is reduced in size by .5 m from the original ESAS design, even this 6-man configuration appears fairly spacious. Air bags are also added to the CM in the new design.

The interior consumables ring appears to be divided into smaller bays around the periphery of the capsule; the propellant tanks for the CM thrusters appear to be located in separate bays from the life support consumables.

I loved the “intelligence analyst” tone of this — it sounded like the author was poring over the pictures, trying to break the code of the design intent that led to the arrangement he was seeing. Hint: the CM prop tanks and the ECLSS tankage are in different sectors of the aft bay because the prop tanks eat up all the volume in the sectors where they reside…simple as that. Indeed, all the packaging of the aft bay is just as straightforward.

I do have to disagree with the “large 6-seat interior”, however. The cabin is not my area, but I do know that things are a little cozy in there when the crewmembers are wearing their suits.

What I’d really like to know (in addition to where nasaspaceflight.com is getting their inside information) is how they generated this rendering. While some of the details look a little flaky, it has a nice quality to it. It has the marks of a Catia V5 image to my eye, rather than the second-rate results available through ProE.

ADDENDUM: Heh. Looking at the larger version of the image in question, there are indeed some inaccurate details. Someone has done a little work to the underlying models used to make the rendering, modifying several components and simplifying/reducing detail on the major structures. Overall it shows the almost-current configuration, but it is a little “off” in the details.

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When Space Mildew Attacks

Being an astronaut is probably not the best choice of occupation if you’re a germophobe:

Imagine their surprise when they opened a rarely-accessed service panel in Mir’s Kvant-2 Module and discovered a large free-floating mass of water. “According to the astronauts’ eyewitness reports, the globule was nearly the size of a basketball,” Ott said.

Moreover, the mass of water was only one of several hiding behind different panels. Scientists later concluded that the water had condensed from humidity that accumulated over time as water droplets coalesced in microgravity. The pattern of air currents in Mir carried air moisture preferentially behind the panel, where it could not readily escape or evaporate.

Nor was the water clean: two samples were brownish and a third was cloudy white. Behind the panels the temperature was toasty warm-82?F (28?C)-just right for growing all kinds of microbeasties. Indeed, samples extracted from the globules by syringes and returned to Earth for analysis contained several dozen species of bacteria and fungi, plus some protozoa, dust mites, and possibly spirochetes.

But wait, there’s more. Aboard Mir, colonies of organisms were also found growing on “the rubber gaskets around windows, on the components of space suits, cable insulations and tubing, on the insulation of copper wires, and on communications devices,” said Andrew Steele, senior staff scientist at the Carnegie Institution of Washington working with other investigators at Marshall Space Flight Center.

Setting aside the juvenile “ick” factor, what’s interesting about this is that NASA is working on a handheld device to locate and identify the bacteria and fungi that attack spacecraft surfaces (which Star Trek fans will surely gush over as a proto-tricorder).

While I’m not a big fan of the “spinoff” justification for NASA’s existence (it’s a cliche, and the claims that a given technology is a “NASA spinoff” are often inaccurate), this is certainly an example of innovation being driven by new needs encountered in space exploration.

As one of the interviewees suggests, a descendent of the LOCAD-PTS device being tested today might prove useful in the detection of life on Mars…even if it’s not sophisticated enough to recognize nonterrestrial life as such, locating and identifying common terrestrial microorganisms will at least whittle down the number of false positives.

But the true “spinoffs” (groan) will be in terrestrial medicine. One example is the spread of “nosocomial” infections in hospitals — if it becomes easier to locate pathogens, and to identify which pathogen it is, it may be possible to further reduce the rates of secondary infection, while also reducing the development of resistance by tailoring sanitation procedures and verifying their effectiveness. Simply being able to “see” where pathogens are will make a huge difference in dealing with them.

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I Hope For His Sake He Has Tenure

What’s remarkable about this article is that what it describes should be unremarkable.

James Wanliss, a space physicist who teaches at Embry-Riddle, showed students the two films [An Inconvenient Truth and The Great Global Warming Swindle] in an honors course titled “The Politics and Science of Fear” because he said more and more the public is being sold one side of an issue with many dimensions.

“I fear that attempts are being made to purposefully subvert the public understanding of the nature of science in order to achieve political goals,” he wrote in an e-mail. “Science is not about consensus, and to invoke this raises the hackles of scientists such as myself. The lure of politics and publicity is no doubt seductive, but it nevertheless amazes me that so many scientists have jumped on the bandwagon of consensus science, apparently forgetting or ignoring the sad history of consensus science.”

Wanliss argues that both films overstate the science as a means to a political end.

Wanliss said he doesn’t necessarily subscribe to either film, but believes his students — and the public — should remain skeptical of theories such as Gore’s explanation of global warming.

Other Embry-Riddle scientists are less outspoken than Wanliss, but one — John Olivero, professor and chairman of the department of physical science — allowed that skepticism is an essential tool of the scientific method.

“Science lives with internal conflict all the time,” Olivero said. “Part of what we have to do is continually challenge each other.”

That process, they say, leads scientists closer to truths that may be elusive for lifetimes.

The truths of global warming are, if not inconvenient, incomprehensible, Wanliss argues.

“The atmosphere is incredibly complicated, and we know very little about it,” he said. “We are studying a system which is so big . . . we don’t know what all the variables are.” [emphasis added]

Apparently these two denialist hacks haven’t gotten the memo: the debate is over, the science is conclusive, there can be no questioning of the AGW gospel.

It would be interesting to see what, if any, trouble this skepticism causes them when their next performance reviews come along.

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Sometimes It Snows In…May?!?

Another week, another blizzard. At least this one was aesthetically pleasing, brought only ten inches of snow, and was entirely free of falling boulders. The silent blue strobing of powerlines shorting out throughout the neighborhood last night was an added entertainment bonus.















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Anthropogenesis?

I typically view AGW proponents as pushing a religion, but this isn’t quite what I was thinking.

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Sex, Death, Mars, and NASA

CNN.com got its hands on a NASA document on crew health issues, and wonders what will happen when astronauts get randy or sick (or dead) on a mission to Mars.

Naturally, they start out with the more titillating of the two:

One topic that is evidently too hot to handle: How do you cope with sexual desire among healthy young men and women during a mission years long?

Sex is not mentioned in the document and has long been almost a taboo topic at NASA. Williams said the question of sex in space is not a matter of crew health but a behavioral issue that will have to be taken up by others at NASA.

The agency will have to address the matter sooner or later, said Paul Root Wolpe, a bioethicist at the University of Pennsylvania who has advised NASA since 2001.

Assuming the astronauts themselves haven’t already addressed it. Heh.

“There is a decision that is going to have to be made about mixed-sex crews, and there is going to be a lot of debate about it,” he said.

Note the bleedingly obvious unstated assumption here. If they think they’ll have a debate over mixed-sex crews, imagine if they decide to go single-sex and then have to deal with the even more charged issue of gay and lesbian astronauts…if mixed-sex crews are ruled out on the grounds that sexual desire among mixed-sex crewmates working in a confined environment for a couple years would be distracting or disruptive, how could they not then rule out homosexuals on the same basis?

And even if they opted to send only married couples, it wouldn’t guarantee that the opposite — strife between or even infidelity among the spouses — wouldn’t turn out to be just as distracting or disruptive. Perhaps the only way to get around this family of problems (if they even prove to be significant problems) is by sending larger crews — how much larger and whether the number would be practical is anyone’s guess, though I’d be surprised if NASA or DoD haven’t done research in that area already.

Other matters should me more straightforward, I should think:

But on other topics — such as steps for disposing of the dead and cutting off an astronaut’s medical care if he or she cannot survive — the document merely says these are issues for which NASA needs a policy.

Simple: if an astronaut dies while in space en-route, they get a space-age burial at sea. The concern over this possibility (and any reluctance to simply commit the body to the deep) is probably motivated by fears of negative public reaction, but would the public necessarily respond negatively — or would they expect it? After all, there is at least one widely-known fictional precedent to point to: that of Frank Poole in 2001. Not to mention ample historical examples of sea burial over the past several centuries.

As for pulling the plug…is this really any more complicated than the equivalent situation which arises in hospitals and nursing homes every day? Require astronauts on long-duration, long-distance missions to create a living will, stating their wishes should this happen. Of course, the policy concerning the fellow crewmember who has to pull the plug — withholding futile treatment, or administering the inevitable death — is another matter, but even that has precedent in war and natural disaster situations.

I can understand NASA wanting (and simultaneously being reluctant) to have policies in place which cover these subjects, though: it is, after all, a government agency whose existence depends on support from Congress (and by extension, in theory at least, the citizenry). Such matters, handled poorly — and especially if handled poorly in an ad-hoc manner — could create a public uproar and uncomfortable questions from oversight committees.

But, you know…there’s something about the concept of issuing command media concerning romance and death that somehow sucks the drama out of space exploration.

[hat tip: Aaron_J]

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2012 Prometheus Award Finalist


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A young girl sets out to prove herself by resolving a long-forgotten mystery. But when she gets close to the truth, what she thought was a harmless adventure becomes a threat to the future of the independent commercial settlements on Mars.

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