Tag: engineering

The atomic rocket that never was

11:19 am

Link here. The article is filled with overstatements and even a few outright errors, such as in the second paragraph when it makes the false assertion that SLS will be “the largest booster ever built.” (The Saturn 5 was more powerful. So was the Soviet Union’s Energia.)

Furthermore, the key to understanding how minor and inconsequencial Project Orion was is to note the total amount of money spent: only $10.5 million. This was merely a design study, something that NASA did (and still does) routinely, most of which never get beyond power-point presentations. Project Orion was similar, never reaching project stage. If it had been done today it would have also been nothing more than a power point presentation.

I also remember when this whole concept got cancelled and was revealed. No one took it seriously, since everyone understood that the technology available in the 1960s was simply not ready for such a project.

Nonetheless, it is interesting reading, especially since the technology today is significantly advanced. We might actually be approaching a time where this concept can finally move to design and construction.

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Jupiter’s cloud-tops, up close

4:16 pm

Jupiter's cloud tops

Cool image time! On the right is a cropped and reduced resolution section from this image from Juno. It shows the top of some of Jupiter’s clouds, swirling about chaotically.

What I find most fascinating is how this image reveals the different elevations of some of these cloud belts. The swirling clouds on the left and bottom of the image are clearly higher than the dark areas to the top and right. They are in fact casting their shadows on those lower cloud-tops.

To really understand the interactions taking place here, however, will require satellites capable of continually tracking these clouds over time. Unfortunately, Juno cannot do this. Though it will provide us periodic snapshots of specific areas, its long 53-day orbit means that it will not return to view the same areas very frequently. Making movies of the evolution of these clouds will be difficult, if not impossible.

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NASA considering using used first stages for Dragon cargo launches

11:15 am

Capitalism in space: With SpaceX’s successful launch on June 3 of a used Dragon cargo capsule to ISS, NASA is now considering using used Falcon 9 first stages for later cargo missions.

“That question has been posed,” Ven Feng, manager of the ISS Transportation Integration Office at NASA’s Johnson Space Center in Houston, said during a post-launch press conference Saturday. “We are looking at it,” he added. “We’re evaluating every aspect of it very carefully, and there is no schedule yet when we might go down that path.”

NASA officials made the same kind of cautious statements several years ago when SpaceX proposed flying a used Dragon capsule. In other words, they are going to do it, it just takes the bureaucracy time to mull the idea over and finally accept it.

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Turkish company announces plans to build commercial rocket

11:09 am

Capitalism in space: A Turkish company, Roketsan, has announced its plans to build a rocket capable of launching both commercial and Turkish government satellites.

A Rocketsan press release that came out right before the Turkish International Defence Industry Fair held May 9-12, 2017, revealed the company’s plan to develop an independently funded satellite launch vehicle (SLV). The SLV will be Turkey’s first domestically produced rocket and it will be capable of launching low-Earth-orbiting satellites to an altitude of 500–700 km.

The SLV development is still in the conceptual design phase, but is planned to have a liquid propulsion system and falls in line with the SLS project. The SLS project involves a three-fold plan, the first step of which is to develop an SLV for the Turkish government.

Even though the SLV development is a fully private venture by Rocketsan, it will be Turkey’s own vehicle to use for government missions. That being said, the SLS project has much bigger and ambitious goals that require two additional phases. The next steps of the project will be the establishment of both a Satellite Launch Centre and Remote Earth Stations.

There is a video animation at the link showing the launch of their imagined rocket. It is worth watching because its almost cartoon quality indicates how far they probably have to travel to make this project happen.

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Proton rolled to launchpad for June 8 launch

11:01 am

After a pause in launches lasting one day short of a full year, Russia has rolled its Proton rocket to the launchpad for a hoped-for June 8 launch of a commercial communications satellite.

The article provides a nice overview of Russia’s struggles during the past year, attempting to track down the reasons why their rockets were having problems (corruption at the rocket engine factory) and their repeated attempts to get this rocket off the ground.

They hope, if all goes well, to complete seven Proton launches through the end of 2017 in order to clean up their backlog while also demonstrating that they have solved their quality control problems.

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India successfully launches its first GSLV Mark 3 rocket

8:59 am

India today successfully launched its most powerful rocket, the GSLV Mark 3, for the first time.

The first orbital launch of India’s Geosynchronous Satellite Launch Vehicle Mark III (GSLV Mk.III) marked a milestone in India’s space program, with the more powerful rocket allowing the Indian Space Research Organisation (ISRO) to begin launching heavier payloads aboard its own vehicles – both for spaceflight applications such as communications and in support of the country’s nascent manned space program.

Monday’s launch came two and a half years after the GSLV Mark III’s maiden flight, a successful suborbital test for which only the rocket’s lower stages were live. The test flight, conducted on 18 December 2014, carried a prototype crew capsule and also served to validate the rocket’s design and demonstrate the stage performance and operation of the rocket’s solid-fuel first stage and liquid-fuelled second stage.

This is India’s third launch this year, which amazingly ties them at this moment with Russia. This will change, as Russia hopes to resume Proton launches this week, but the fact both speaks well of India’s growing success in space and Russia’s continuing problems.

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Arianespace successfully launches two commercial satellites

11:16 pm

Capitalism in space: Arianespace tonight successfully launched two commercial communications satellite with its Ariane 5 rocket.

This is the third launch by the company since it settled its labor problems in French Guiana in late April. Since then they have managed a launch ever two weeks, and at the moment Arianespace and SpaceX are tied for the most launches in 2017 at six. This tie should only last until Saturday when SpaceX hopes to launch a reused Dragon to ISS.

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Mucking about off-hours in San Francisco, California

6:01 pm

An evening pause: Hat tip Edward Thelen, who writes, “A brief tour of the Jeremiah O’Brien engine room (an operational Liberty Ship) and other San Francisco sights. The narrator mentions the degaussing coils that they started to use on ships during WWII to prevent magnetic mines from sinking them. The slight of hand is especially good; I think I figured it out. There was a time, before the 1980s, when the passengers helped to turn the cable cars.”

I like these comments by the videographer at his youtube website: “This WW2 Liberty ship only took 50 days to build! Vid includes random shots between getting pissed on by a homeless dude and avoiding that guy wearing nothing but a gold sequined sock.” Well, no one should be surprised. This is in fascist California.

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Did the Pentagon give ULA $27.4 million for work already done?

5:32 pm

Corruption: It appears that a Department of Defense $27.4 million contract awarded to ULA on May 16 to develop new avionics for its rockets was for work already completed by the company.

The government award to ULA reinforces the notion that, traditionally in aerospace, the government pays for rocket upgrades. But it is also curious because of its timing—for work to be completed two years from now. Based upon information in an article written by two ULA engineers and published in Advances in the Astronautical Sciences Guidance, Navigation and Control, the avionics system has already been upgraded. Moreover, the February 5, 2016 launch of a GPS satellite for the Air Force marked the first launch of the common avionics system.

“The launch of GPS IIF-12 in February 2016 represents the culmination of several years of development work to update avionics hardware and flight software as well as simulation and test environment tools,” the research article states. “Common avionics addresses the challenge of parts obsolescence any program with the longevity of (this one) must face. ULA has taken advantage of this opportunity to design and produce a more affordable solution for vehicle control that will also expand the capability of our launcher fleet.”

A call into the Air Force for an explanation resulted in no response at all.

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VSS Unity completes fifth glide flight

4:30 pm

Virgin Galactic’s new suborbital ship, VSS Unity, successfully made its fifth unpowered glide test flight today.

VSS Unity’s glide flights have gone well, and as a result, Virgin Galactic is getting ready to transition to the next part of the test campaign, company representatives said. “To that end, as we analyze the data from today’s flight, we will be moving into a period of ground-based activity focused on preparation for fueled, and then powered, flights,” they wrote in the description.

They provided no indication of exactly when those next flights will occur, which considering the company’s past record of failed predictions, is definitely a good thing.

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Rat sperm exposed to weightlessness still produces healthy rats

8:46 am

An experiment that flew on ISS has found that rat sperm exposed to weightlessness and space radiation and then used on Earth to fertilize eggs still produce healthy rats.

The first issue for the researchers was how best to get the sperm up there. They decided to have the samples freeze-dried, just like instant coffee. This meant the sperm weighed almost nothing and could be kept at room temperature, ideal for travel on a rocket, or on a distant planet. The mouse sperm then spent 288 days on the ISS before coming back to Earth to be compared with fresh sperm from the same mice.

First, the scientists analysed how space travel affected the integrity of the DNA within the sperm. We know that high levels of fragmentation of sperm DNA are associated with male infertility. As expected, the scientists discovered that the space sperm had higher amounts of fragmented DNA than the sperm which had stayed on Earth. However, when used to fertilise a mouse egg, the space sperm resulted in a similar number of healthy embryos being generated – and these offspring had the ability to develop into normal, fertile adult mice. A final test the researchers did was to compare the patterns of genes being expressed within the brains of the adult mice. Here, the researchers saw no overall differences and concluded the space sperm was equally capable of generating offspring.

Obviously, this result is encouraging, but we are still a long way from nonchalantly letting women get pregnant and give birth in space. The risks on the child remain too great and are unknown.

In fact, I suspect the first time a child is born and raised in space will be an event that is unplanned.

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Russia moves to reduce launch costs with new rocket

8:37 am

The head of Roscosmos said today that they are pushing to accelerate the development of a new rocket, dubbed Phoenix, that will reduce launch costs by 20%, lowering the launch price per launch to $55 million.

I have been reading stories like this, about a new wonderful Russian rocket or spacecraft, for decades. First there was Clipper. Then there was Angara, repeatedly. Recently they have been talking up a new manned capsule and cargo ship. Along the way were a number of other forgotten proposals that would revolutionize space travel. None of these proposals however have ever seen the light of day, though Angara has completed two test flights.

In the past, Russia was not under any competitive pressure. They could undercut the launch price of every other rocket company in the world, without doing anything. Now, they face stiff competition that is only going to get stiffer. They need to produce, or they will be out of the game entirely.

The big question is whether they can, as a nationalized space industry run by a government that is rampant with corruption.

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NASA names next solar mission after pioneer solar scientist Eugene Parker

10:31 pm

NASA has named its next solar mission, which will fly closer to the Sun than any previous mission, after pioneer solar scientist Eugene Parker, who in the 1950s predicted the existence of the solar wind.

The new moniker honors pioneering University of Chicago astrophysicist Eugene Parker, who predicted the existence of the solar wind — the stream of charged particles flowing constantly from the sun — back in 1958. [Solar Quiz: How Well Do You Know Our Sun?]

NASA has named about 20 space missions after people; the Hubble Space Telescope is perhaps the most famous example. But the 89-year-old Parker is the first researcher to be celebrated in this manner while still alive, agency officials said.

Parker deserves it, for sure, and it is really nice to honor him while he is still alive to appreciate it.

The spacecraft is scheduled to launch at the end of July.

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Stratolaunch unveils its giant mother ship

10:27 pm

Capitalism in space: Stratolaunch today finally revealed the giant airplane, the largest ever built, that it wants to use as a first stage for launching satellites cheaply into space.

From their webpage:

Over the past few weeks, we have removed the fabrication infrastructure, including the three-story scaffolding surrounding the aircraft, and rested the aircraft’s full weight on its 28 wheels for the first time. This was a crucial step in preparing the aircraft for ground testing, engine runs, taxi tests, and ultimately first flight.

Once we achieved weight-on-wheels, it enabled us to weigh the Stratolaunch aircraft for the first time, coming in at approximately 500,000 lbs. That may sound heavy, but remember that the Stratolaunch aircraft is the world’s largest plane by wingspan, measuring 385 ft. – by comparison, a National Football League field spans only 360 ft. The aircraft is 238 ft. from nose to tail and stands 50 ft. tall from the ground to the top of the vertical tail.

The Stratolaunch aircraft is designed for a max takeoff weight of 1,300,000 lbs., meaning it’s capable of carrying payloads up to approximately 550,000 lbs. As we announced last fall , we will initially launch a single Orbital ATK Pegasus XL vehicle with the capability to launch up to three Pegasus vehicles in a single sortie mission. We have already started preparations for launch vehicle delivery to our Mojave facilities. We’re actively exploring a broad spectrum of launch vehicles that will enable us to provide more flexibility to customers.

They plan to do ground tests throughout this year, aiming for a first flight test in 2019.

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If TMT moves from Hawaii Canada might exit partnership

11:32 am

The possibility that the Thirty Meter Telescope might be forced to move from Hawaii to the Canary Islands because of political opposition in Hawaii has Canadian scientists considering leaving the partnership.

The mega-telescope is “a critical component of the Canadian astronomical landscape,” says Michael Balogh, an astronomer at the University of Waterloo in Ontario. The country — one of six major international partners — has committed CAN$243 million (US$180 million) to the project. “If we have to move, it’s effectively a de-scope in the project,” says Balogh.

The back-up site, Roque de los Muchachos in La Palma, the Canary Islands, is lower in elevation than Mauna Kea, and its skies are more turbulent than those above the Hawaii mountain. That means that observing conditions are not quite as good; in particular, the extra atmosphere above La Palma interferes with much of the observing in mid-infrared wavelengths of light, the sweet spot for looking at exoplanet atmospheres.

If Canada leaves, there is a chance that the entire TMT partnership might fall apart.

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Near the Martian south pole

10:06 am

Near the Martian south pole

Cool image time! The image above, reduced and cropped to show here, shows an area at 87 degrees south latitude, not far from the south pole of Mars and in the region at the edge of its icecap of dry ice.

It is late summer in the Southern hemisphere, so the Sun is low in the sky and subtle topography is accentuated in orbital images.

We see many shallow pits in the bright residual cap of carbon dioxide ice (also called “Swiss cheese terrain”). There is also a deeper, circular formation that penetrates through the ice and dust. This might be an impact crater or it could be a collapse pit.

Because of the low Sun angle the bottom of the deep pit is poorly lit, making it hard to determine the pit’s nature. What can be seen at its bottom however are some patches of carbon dioxide ice, melting in the same manner as the dry ice in the surrounding terrain. Also, the dust pattern surrounding the pit indicates the prevailing winds at this location, consistently blowing to the northeast.

I am certain there will be additional photos taken of this pit, when the Sun is higher in the sky and its floor is thus better illuminated.

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Road construction at SpaceX’s planned Texas spaceport

9:47 am

Capitalism in space: A $3 million road project at SpaceX’s planned spaceport at Boca Chica Beach near Brownsville, Texas, is moving forward.

The key tidbit from the article however is this:

Besides the property tax breaks and incentives that Cameron County and other entities around the RGV have already offered SpaceX to come to the Valley, Garcia said they’ll continue to do what it takes to stay on target for a 2018 launch. “Every month we’re going to be on the map,” he said.

It appears that the reason work on the spacepad itself has seemingly stalled is because SpaceX has been waiting for this road work by the state to be completed. Either way, they are aiming for a first launch next year. At that time SpaceX should have four launchpads, 2 in Florida, one in California, and one in Texas.

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Air Force successfully tests ICBM interceptor

2:31 pm

The Air Force today successfully shot down a dummy ICBM missile it had launched from the western Pacific.

As described prior to the test:

The U.S. will launch an ICBM-class target from the Reagan Test Site on Kwajalein Atoll in the Republic of the Marshall Islands and a ground-based interceptor from Vandenberg Air Force Base in California. If successful, the “kill vehicle,” or intercept, will collide with the ICBM test target mid-course over the Pacific Ocean… This will be the 18th test of the ground-based interceptor. The last one, in June 2014, was the first success since 2008. The system is nine for 17 since 1999 with other types of target missiles. An ICBM target has never been tested before.

I should note that this successful test is final proof that Reagan’s proposed Strategic Defense Initiative (SDI), or “Star Wars” as the leftist press contemptuously called it in their unwavering belief that it could not work, is feasible and can work.

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Curiosity data increases time water existed Gale Crater

9:45 am

New research using data from Curiosity has found evidence suggesting that significant water was present in Gale Crater for a very long time.

Lighter-toned bedrock that surrounds fractures and comprises high concentrations of silica — called “halos”— has been found in Gale crater on Mars, indicating that the planet had liquid water much longer than previously believed. The new finding is reported in a new paper published today in Geophysical Research Letters, a journal of the American Geophysical Union.

“The concentration of silica is very high at the centerlines of these halos,” said Jens Frydenvang, a scientist at Los Alamos National Laboratory and the University of Copenhagen and lead author of the new study. “What we’re seeing is that silica appears to have migrated between very old sedimentary bedrock and into younger overlying rocks. The goal of NASA’s Curiosity rover mission has been to find out if Mars was ever habitable, and it has been very successful in showing that Gale crater once held a lake with water that we would even have been able to drink, but we still don’t know how long this habitable environment endured. What this finding tells us is that, even when the lake eventually evaporated, substantial amounts of groundwater were present for much longer than we previously thought—thus further expanding the window for when life might have existed on Mars.”

The actual paper provides no time frame. What it does state is that for the halos to have formed requires a lot of time, and that during that time a lot of groundwater was required.

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Results after one year on ISS for Bigelow’s inflatable module

8:38 am

Capitalism in space: NASA has released some of its findings learned from Bigelow’s inflatable BEAM module, attached now to ISS for one year.

During the first year, NASA and its astronauts on board the station have sought primarily to test the module’s ability to withstand space debris—as a rapidly depressurized habitat would be a bad thing in space. And indeed, sensors inside the module have recorded “a few probable” impacts from micrometeoroid debris strikes, according to NASA’s Langley Research Center. Fortunately, the module’s multiple layers of kevlar-like weave have prevented any penetration by the debris.

They have also found that the cosmic ray dosage in the module seems comparable to the rest of the station. They are now using the module to test the radiation shielding capability of several different kinds of materials.

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North Korea fires another ballistic missile

6:11 pm

North Korea today conducted its ninth ballistic missile test this year, all of which have been in violation of UN sanctions.

The missile, presumed to be a Scud type, was launched eastward from the vicinity of Wonsan, Gangwon Province, at around 5:39 a.m., according to the Joint Chiefs of Staff (JCS). “The flight distance is around 450 kilometers,” it said.

As a Scud, the missile would likely not have the capability of carrying a heavy payload, like a nuclear bomb. Nonetheless, with each test North Korea gains knowledge on how to do exactly that.

For a detailed look at the people building North Korea’s missile program see this article from yesterday: Kim’s rocket stars – The trio behind North Korea’s missile program

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Brewing beer on the Moon

10:41 am

Capitalism in space: A student experiment to attempt to brew beer on the Moon, rejected by one Google Lunar X-Prize contestant, has been accepted by another.

The experiment involves a small canister that, once on the moon, will mix yeast with wort, the mixture of barley and other ingredients that give beer its flavor, to cause fermentation and carbonation. Besides proving that beer can be brewed remotely and in low gravity, the experiment demonstrates the potential for making other things involving yeast in low gravity, such as bread and certain medicines, which could be important if a lunar colony is ever established.

The canister, designed by the students at the Qualcomm Institute Prototyping Facility, will be aboard a spacecraft being built by Synergy Moon, one of the teams competing for the Google Lunar XPrize, a contest meant to inspire engineers and entrepreneurs to develop low-cost methods of robotic space exploration..

They have also been accepted to fly the experiment on several Synergy Moon orbital flights.

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LRO hit by meteoriod in 2014

5:35 pm

LRO as it was hit by a meteor

While taking an image in October 2014, Lunar Reconnaissance Orbiter had apparently been hit by some small object, causing it to vibrate and create the zig-zag distortions seen on the image, a cropped section of which is shown on the right.

Clearly there was a brief violent movement of the left NAC [Narrow Angle Camera]. The only logical explanation is that the NAC was hit by a meteoroid! How big was the meteoroid, and where did it hit? The physical properties and vibration modes of the NAC are very well known – during development a detailed computer model was made to ensure the NAC would not fail during the vibrations caused by the launch, which are severe. The computer model was tested before launch by attaching the NAC to a vibration table that simulates launch. The model was solid, both NACs survived the test, and launch.

Most of each NAC is sequestered inside the spacecraft structure, so only the leading edge of the baffle and the radiator are exposed to space, and thus are potential targets for impactors. From the detailed computer model, the LROC team ran simulations to see if we could reproduce the distortions seen the image. Assuming an impact velocity of 7 kilometers per second and a density 2.7 g/cm3, an impacting particle would have been 0.8 mm in diameter (~half the size of a pinhead). If the velocity was faster, then the particle would have been smaller, and if slower then larger.

For comparison, the muzzle velocity of a bullet fired from a rifle is typically 0.5 to 1.0 kilometers per second. So the meteoroid was traveling much faster than a speeding bullet. In this case LROC did not dodge a speeding bullet, but rather survived a speeding bullet!

The image is fascinating because you can see the vibrations slowly disappear as the zig-zags shrink and fade.

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NASA delays launch of space-junk removal test satellite

5:06 pm

In order to do additional safety reviews NASA has ordered a six-month delay, at the minimum, in the launch of test space junk removal satellite.

“Nothing of this size has ever been launched from the ISS before,” said Jason Forshaw, RemoveDebris project manager at the University of Surrey’s Surrey Space Centre, which leads the consortium [that built the satellite]. “Most of the things they are launching from there are cubesats, much smaller objects, 10 [kilograms] or so,” Forshaw said. “As you can imagine, we are progressing through the safety reviews and we are just going through those at the moment.”

The article also includes some discussion of the legal limitations of salvage in space, once again due to the limits in the Outer Space Treaty.

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