Tag: engineering

NASA has chosen the four shuttle engines that will be used to launch SLS on its first mission in 2021.

10:26 am

What a waste: NASA has chosen the four shuttle engines that will be used to launch SLS on its first mission in 2021.

All four engines were used multiple times on many shuttle missions. They will fly once on SLS, at a cost of many billions, and then end up destroyed when that giant rocket’s first stage falls into the ocean. Worse, no one has really defined what the goal of that first launch will be. It might merely be a test launch, with no humans on board.

To me, it would be wiser to put the engines into storage and wait until we have a new reusable capability that could take advantage of the reusable engineering of these engines. Throwing them away on a pork-barrel boondoggle like SLS seems so stupid.

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Russia fights back

9:50 am

Much has been made about the sanctions the Obama administration has imposed on any cooperation with Russia due to the situation in Ukraine and how those sanctions might damage the commercial and manned space efforts of the United States.

So far, all evidence has suggested that the sanctions have little teeth. The Obama administration exempted ISS from the sanctions. It also appears to be allowing the shipment of all commercial satellites to Russia for launch. Even a court injunction against using Russia rocket engines in U.S. military launches was lifted when the Obama administration asked the judge to do so.

The Russians now have responded. Why do I take their response more seriously?
» Read more

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A news story today reports that cracks have been discovered in the wings of WhiteKnightTwo.

8:27 am

More problems for Virgin Galactic: A news story today reports that cracks have been discovered in the wings of WhiteKnightTwo.

Sources tell me the cracks are along the spars that run the length of the wings. Specifically, they are located where the spars connect with the fuselage. My sources tell me the cracks have caused quite a bit of concern among the engineers at Virgin and Scaled. One particularly worrisome aspect is that nobody knows why or when they occurred.

I’m told there is some comfort in the repairs being made based on previous Scaled experience in patching composites. However, since the cause of the cracks is uncertain and WhiteKnightTwo is unique in terms of its size and the stresses placed on it by SpaceShipTwo, the engineers are in uncharted territory. They don’t know if they have addressed the root cause, or whether the problem will reoccur.

If this story turns out to be trie, it will likely be a disaster for Virgin Galactic. Not only can they not yet fly SpaceShipTwo because of engine issues, the mother ship that puts the spacecraft into the air can’t fly either.

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Does the auction sale of an Excalibur Almaz capsule signal the end of this manned space commercial company?

9:23 am

Does the auction sale of an Excalibur Almaz capsule signal the end of this manned space commercial company?

It certainly looks that way, which is tragic in that the company had a very smart and viable idea: Use already built Soviet-era manned space equipment to launch a space hotel and provide a ferry to it for a relatively low cost. The development was already done and the hardware already built. All they had to do is refurbish and update things.

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Ground tests of SpaceShipTwo’s engines continue.

9:20 am

Ground tests of SpaceShipTwo’s engines continue.

No flight tests have occurred in four months, however, which suggests that they have decided to abandon their first engine design and are now doing these new ground tests to prove the reliability of the new engine before proceeding to flight tests. The lack of flight tests also suggests that Richard Branson’s most recent announcement that he will definitely fly as a passenger this year is most likely hogwash.

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The trip of what is essentially a circuit breaker on ISS has reduced the station’s power by about 12.5%.

9:02 am

The trip of what is essentially a circuit breaker on ISS has reduced the station’s power by about 12.5%.

The cause and solution has not yet been isolated. The loss of power at this point is not critical, and has not effected any experiments or the safety of the crew.

The article itself gives a very detailed and informative outline of the system and what has happened, though you have to spend the time to wade through the alphabet soup of NASA terminology — SSU, SAWs, VDC, DCSUs, MBSUs, DDCUs, POR — that NASA uses.

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Building a scale model of the International Space Station — using matchsticks!

9:12 am

Building a scale model of the International Space Station — using matchsticks!

Recently completed by Acton, the wooden ISS is as impressive in size as it is in detail. Comprised of 282,000 matchsticks, the 1/26 scale model required 8 gal (30 L) of glue and took roughly 1,950 hours to complete. Whereas the actual ISS measures out at 108.5 m (356 ft) wide and 72.8 m (239 ft) long, Acton’s scaled down version measures out at an impressive 4.1 m (13.5 ft) and 2.8 m (9.2 ft) wide. Solar arrays, trusses, communication components, and even the Space Shuttle Atlantis, are all there in intricate detail.

With pictures.

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Fact checking Elon Musk’s statements about his company’s efforts to reuse the Falcon 9 first stage reminds us of some space history and one of Musk’s chief competitors.

9:06 am

Fact checking Elon Musk’s statements about his company’s efforts to reuse the Falcon 9 first stage reminds us of some space history and one of Musk’s chief competitors.

The bottom line: Bringing the first stage back to Earth safely and vertically is doable, and has been done before.

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In response to the Obama administration’s request a judge has lifted her injunction against the purchase of Russian rocket engines for the Atlas 5 rocket.

7:27 pm

In response to the Obama administration’s request a judge has lifted her injunction against the purchase of Russian rocket engines for the Atlas 5 rocket.

More here. It appears that, at least for the moment, the Atlas 5 rocket will be allowed to buy these engines. Whether the Russians will continue to allow them to buy them however remains an open question, especially if things in the Ukraine get worse.

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How to turn an American spacecraft ferrying astronauts to ISS serve as a lifeboat as well.

9:07 am

How to turn an American spacecraft ferrying astronauts to ISS serve as a lifeboat as well.

A very interesting read, as it outlines the specific technical problems faced by engineers that one wouldn’t normally consider. The capsule has to be able to remain functional and reliable after months in orbit, but it also has to become functional at a moment’s notice, should an emergency happen.

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The creation in the lab of an as yet unnamed superheavy element adds weight to the theory that there might exist even heavier elements that are stable in nature.

8:59 am

The creation in the lab of an as yet unnamed superheavy element adds weight to the theory that there might exist even heavier elements that are stable in nature.

The scientists did not observe element 117 directly. Instead, they searched for its daughter products after it radioactively decayed by emitting alpha particles—helium nuclei with two protons and two neutrons. “The heavy nuclei makes an alpha decay to produce element 115, and this also decays by alpha decay,” says Jadambaa Khuyagbaatar of GSI, lead author of a paper reporting the results published on 1 May in Physical Review Letters.

After a few more steps in this decay chain, one of the nuclei produced is the isotope lawrencium 266—a nucleus with 103 protons and 163 neutrons that had never been seen before. Previously known isotopes of lawrencium have fewer neutrons, and are less stable. This novel species, however, has an astonishingly long half-life of 11 hours, making it one of the longest-lived superheavy isotopes known to date. “Perhaps we are at the shore of the island of stability,” Düllmann says.

If these superheavy elements could be created, they would be the stuff of science fiction. They might have properties that we would find extremely useful.

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SpaceX continues to acquire land in Texas for its planned spaceport in Brownsville.

8:40 am

The competition heats up: SpaceX continues to acquire land in Texas for its planned spaceport in Brownsville.

Elon Musk’s Dogleg Park LLC picked up an additional five lots in late April, bringing the total number of lots it has acquired in Cameron County to 95. The total land area that SpaceX now owns is roughly 38 acres of land, public records show. This is in addition to 56.5 acres that SpaceX has under lease at the site of what would be the world’s first private and commercial vertical launch site.

Compared to the acquisitions made by the federal government when it established its space centers in Florida and Wallops Island, these purchases are small. Nonetheless, they are likely sufficient for what the company plans to do.

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SpaceX releases spectacular footage of another vertical take-off and landing test of their Falcon 9R rocket.

8:33 am

The competition heats up: SpaceX releases spectacular footage of another vertical take-off and landing test of their Falcon 9R rocket, this time flying over 3,000 feet in the air.

Video below the fold. What I think everyone, including me, has missed so far about both the Grasshopper and the Falcon 9R test flights is that the test vehicle not only was able to land safely using its rockets, both vehicles were quickly turned around and flown again. This certainly lends weight to the feasibility of the company’s plan to make their first stage reusable.

» Read more

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The porksters arrive!

9:01 am

A draft bill in Congress is proposing the Pentagon develop an engine for the Atlas 5 engine to replace the Russian engine now used.

The legislation passed by a House subcommittee Wednesday calls for up the U.S. military to spend up to $220 million next year to kick off full-scale development of the engine, which could be ready for flights no later than 2019. The bill states the Defense Department “should develop a next-generation liquid rocket engine that is made in the United States, meets the requirements of the national security space community, is developed by not later than 2019, is developed using full and open competition, and is available for purchase by all space launch providers of the United States.”

There is no reason for this funding gift to the aerospace industry. For one thing, there are two rockets that already exist that use all U.S. parts, the Delta family of rockets and the Falcon 9. For another, if Congress stays out, the private sector will take care of this need and do it for a lot less and far quicker, while costing the taxpayers relatively little. By making this a government project we guarantee it will be expensive and take forever, thus keeping the pork flowing to Congressional districts without solving the problem.

And speaking of keeping pork flowing to Congressional districts, pork king Senator Richard Shelby (R-Alabama) today ripped into NASA for trying to trim a little from the budget of SLS (which sends a lot of cash to Alabama). He also condemned NASA’s manned commercial effort.
» Read more

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On the radio

1:57 pm

In addition to my May 6 at 7 pm (Pacific) appearance on the Space Show with David Livingston to discuss the situation with the Russians and ISS, I am also going to appear on Coast to Coast with George Noory on May 7 from 10 to 11 pm (Pacific) to discuss the same topic.

The Russian situation is a difficult one for the United States, and the reason it is difficult is because of a long series of incredibly stupid decisions by our elected officials, from both parties, for the past decade. Nor is my complaint here 20-20 hindsight. From the day George Bush proposed retiring the shuttle in 2010 and not replacing it until 2014, at the earliest, I have said this is stupid and astonishingly short-sighted. Sadly, Congress liked Bush’s short-sightedness and has been endorsing it now for a decade. Hearing them complain now about our dependence on Russian space capabilities is more than infuriating. Where were they when they might have done something to prevent this situation?

Listen in. I think it will be entertaining.

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Engineers commanded Curiosity to drill its third drill hole on Tuesday on what looks like an outcrop of sandstone in Gale Crater.

9:22 am

Engineers commanded Curiosity to drill its third drill hole on Tuesday on what looks like an outcrop of sandstone in Gale Crater.

This hole is shallow and is merely a test to see if a deeper full bore would be worthwhile geological.

That Curiosity has only drilled three holes, and is now only doing a test bore first is partly because engineers fear that using the drill too much will cause a short circuit that will disable the rover entirely. This fear is because of a design flaw in the construction of the rover and the drill.

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A gigantic forest fire threatens Russia’s new spaceport under construction in Vostochny.

9:12 am

A gigantic forest fire threatens Russia’s new spaceport under construction in Vostochny.

[Spaceport construction chief Konstantin] Chmarov reportedly characterized the fire-fighting effort in the region as “chaos.” Fueled by hot weather and strong winds, the fire approached the airport in Svobodny and was also moving toward Vostochny. In the meantime, satellite images showed heavy smoke blanketing the future space center.

The Putin government has been giving the completion of this spaceport a high priority. Having it burn down before completion is not what they want.

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Orbital Sciences is considering using ATK’s solid rocket motors to replace the refurbished Russian engines in the first stage of its Antares rocket.

7:40 pm

Orbital Sciences is considering using ATK’s solid rocket motors to replace the refurbished Russian engines in the first stage of its Antares rocket.

This helps explain the merger between the two companies, as it gives Orbital control over the equipment it needs to keep Antares viable. More important, it also could make it entirely American made, which will be attractive to both Congress and many U.S. commercial satellite companies.

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More delays seen in the completion of a new and critical module to the Russian portion of ISS.

9:40 am

More delays seen in the completion of a new and critical module to the Russian portion of ISS.

The delays have nothing to do with the Ukraine and everything to do with poor quality control in the Russian company building the module.

This quote stood out however:

With its central position in the architecture of the Russian segment, the MLM’s troubles also stall the launch of all subsequent Russian components of the station, including the Node Module, UM, (already under construction) and the NEM laboratory and power supply module, whose full-scale development started in 2012.

Given such a prolonged delay, combined with worsening political relations between Russia and its partners in the ISS project, the questions were raised whether the MLM module and the successive components of the Russian segment could be grounded until the assembly of the new all-Russian station in the post-ISS era. Under such a scenario, the troubled spacecraft could play a role of an early hub for the future orbital outpost.

If the Russians get enough modules built to launch their own station, I expect them to do it and cut their ties with ISS.

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