Category Archives: Technology and Society

Political Commentary, Technology and Society

Guilt-Free Petroleum

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Some thoughts from Thomas James:

…the amusing part is that it is theoretically a carbon-negative fuel source — the microbes take more carbon out of the atmosphere than what they excrete as a useable oil (if that doesn’t seem to make sense, recall that the microbes themselves require carbon for their own structure).

On the other hand, since this approach requires genetic engineering, the watermelons and luddites will no doubt put the kibosh on it regardless of its benefits — the only thing more intolerable than the idea of environmental-guilt-free petroleum sustaining the Western lifestyle of individuality, independence, and material happiness is the knowledge that that guilt-free petroleum comes from “frankenbacteria.”

They’ll hate it even without the bioengineering. As noted, it doesn’t require us to tighten our hair shirts, or depopulate the planet.

Space, Technology and Society

Thoughts On The Number Six

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Over at Rockets and Such.

So, it goes from Ares 5 to Ares 6, and it still doesn’t satisfy the mission requirement. And now it has outgrown the MLP.

There’s a concept in the development of a space vehicle known as “chasing your tail,” in which the need to add something to the vehicle (like adequate structural strength, with margin) results in more weight, which results in the need for bigger or more engines to push it, which results in the need for more propellant capacity to accelerate the added mass, which results in…

And the design won’t close.

Now in fact, it is probably possible to get this design to close–bigger vehicles are easier in that regard than small ones. But regardless of the size of the vehicle, mission needs are always going to grow (and they still don’t really have solid numbers on the EDS/Altair/cargo requirements). So it won’t be able to get the mission concept (one and a half launch) to close, particularly as we move beyond the moon, even if it can be done for the moon.

The rationale for the heavy lifter has always been to avoid the complication of orbital assembly (apparently, the false lesson learned from our success with assembling ISS is that we should throw away all that experience, and take an entirely different approach for VSE). But it’s already a “launch and half” mission, needing both Ares 1 and Ares 56, so they’re not even avoiding it–they’re only minimizing it. And even if the lunar mission doesn’t outgrow the Ares 6, it won’t be able to do a Mars mission in a single launch. So if we need to learn to do orbital assembly (and long-term propellant storage) anyway, why postpone it? Why not take the savings from not developing an unneeded heavy lifter (and new crew launch vehicle), and invest it in orbital infrastructure, tools and technology to provide a flexible system that can be serviced by a range of launch vehicles, without the single-point failure of Ares? These are the kinds of issues that a new administrator will have to consider next year.

And don’t get me started on the Ares 1 problems:

The currently favored mitigation approaches – still undergoing a trade study – for thrust oscillation will add around 500 lbs to Orion for shock mounting on the crew seats and vital components.

So, because the geniuses behind this concept decided to put the crew on top of the world’s biggest organ pipe, they’ll add a quarter of a ton to an already-overweight vehicle with no margin, so that the astronauts will (might?) be able to survive watching the rest of the capsule being vibrated even more intensely around them.

There is a word for this. It starts with a “k” and ends with “ludge.” And then there’s this.

Thrust oscillation is now categorized as a 5×4 risk for the upper stage.

I’m not sure which axis is which in that formulation, but it either means that there is a very high likelihood of a catastrophic outcome, or that that it is probable that there will be a near-catastrophic outcome. And no mitigation has yet been found.

They really need to consider going from one and a half launches to (at least) two launches of a single medium-sized vehicle type. Two launches is two launches, it would save them a huge amount of development costs, provide much better economies of scale in operation and production, and get completely around the “stick” idea, which is proving to be a programmatic disaster waiting to happen, if it hasn’t already. Let us finally end the cargo cult of Apollo, and develop real infrastructure.

[Late morning update]

Here’s more discussion over at NASA Space Flight.

[Update a few minutes later]

In a post from a week ago, Chair Force Engineer has some related thoughts as well, on the wisdom of choosing solids at all:

The solid-liquid trade study is one that couldn’t have been adequately analyzed during the 60 days of the ESAS study, and will likely end up as an interesting footnote in the Ares story. The question is whether the Ares story will fall into the genre of historical nonfiction, or fantasy and tragedy. If the latter is true, perhaps liquids were the answer after all. But the decision to not cap the weight of Ares V (even at the expense of payload) is one that taxpayers shouldn’t forget if the massive rocket, and its shiny new infrastructure, ever get off the drawing board.

It seems pretty clear (as it did at the time) that the decision to build “the Stick” was pre-ordained, and that the sixty-day study was a rationalization, not a rationale, and that none of the CE&R recommendations were seriously considered. An Administrator Steidle would no doubt want to revisit it.

Political Commentary, Science And Society, Technology and Society

Seek, And Ye Shall Find

32 Comments

Another huge oil discovery in Brazil.

What’s amazing is not so much that Congress won’t allow us to pump oil, which we badly need to do. They won’t even allow us to look for it, especially if it’s in a “pristine” (aka barren coastal plain, frozen in the winter and a mosquito-infested bog in the summer) region, at least according to Senator McCain.

What are they afraid we might find?

Business, Humor, Technology and Society

Only Cat 5?

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For that kind of money, I’d expect Cat 8, at least.

An audiophile and his money are soon parted.

[Update a few minutes later]

As noted, the Amazon customer reviews are hilarious.

[Update in the evening]

Stephen Dawson (from Down Under) has a defense (albeit pretty flimsy. as he admits) of Denon.

I have to admit my disappointment as well. I’d always respected Denon up until this. As someone in comments said, one hopes that the marketing person responsible will have a few of these cables run through them from one end to the other. Or be keelhauled with them.

Technology and Society

A Hopeful Long Shot

24 Comments

Some interesting progress in polywell fusion.

“We’re fully operational and we’re getting data,” Nebel said. “The machine runs like a top. You can just sit there and take data all afternoon.”

So was Bussard correct? Will it be worth putting hundreds of millions of dollars into a larger-scale demonstration project, to show that Bussard’s Polywell concept could be a viable route to fusion power?

Nebel said it’s way too early to talk about the answers to those questions. For one thing, it’s up to the project’s funders to assess the data. Toward that end, an independent panel of experts will be coming to Santa Fe this summer to review the WB-7 experiment, Nebel said.

“We’re going to show them the whole thing, warts and all,” he said.

Because of the complexity, it will take some interpretation to determine exactly how the experiment is turning out. “The answers are going to be kind of nuanced,” Nebel said.

The experts’ assessment will feed into the decision on whether to move forward with larger-scale tests. Nebel said he won’t discuss the data publicly until his funders have made that decision.

Let’s hope it pans out. If so, Bob Bussard will be smiling from the grave, or wherever he is.

Political Commentary, Science And Society, Technology and Society

Fighting Global Warming

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With geoengineering. But the hair shirters don’t like it:

Stabilization can only be achieved by cutting current carbon dioxide emissions by 80 percent. This means implementing highly unpopular policies of carbon rationing and higher energy prices. So some climate change researchers and environmental activists worry that the public and policymakers will see geoengineering as way to avoid making hard decisions. “If humans perceive an easy technological fix to global warming that allows for ‘business as usual,’ gathering the national (particularly in the United States and China) and international will to change consumption patterns and energy infrastructure will be even more difficult,” writes Rutgers University environmental scientist Alan Robock.

Well, boo frickin’ hoo.

[Update a couple minutes later]

Commenter Chris Potter has a pithy translation: “If there’s no good reason for people to do what I want them to do, they won’t do it.”

History, Space, Technology and Society

A New Project In The Works?

4 Comments

Alan Boyle has an interview with Paul Allen. This isn’t right, though:

Adrian Hunt, the collection’s executive director, told me that putting a pilot in the V-1 turned out to be a terrible idea.

“The theory is that you open the cockpit and you jump out just when you’re getting close to the target,” he said. “There’s a slight design fault there. Once you open the cockpit, that’s the intake for the rocket – and it tends to suck in things, including people.

“…intake for the rocket”?

It was a pulse jet.

Economics, Political Commentary, Science And Society, Technology and Society

Geoengineering

9 Comments

A brief survey of potential global warming solutions. What is more interesting to me than the engineering is the politics and ethics of all this. Asteroid diversion falls in the same category. But at least some of these things could drive a need for low-cost space access in an unprecedented manner.

But this is one that doesn’t really seem to be in this category, unless it were mandated. It’s more of a “think globally, act locally” approach:

On the opposite end of the spectrum is the ultra-low-tech approach of painting rooftops white to reflect sunlight.

We’ve been thinking about doing that anyway, just to reduce our air conditioning bill. With a gray cement tile roof, that soaks up a lot of sun, it’s hotter than Hades’s kitchen in the attic this time of year, and that could really cool things down.