Tag: spaceflight

A fourth engine burn has put India’s Mangalyaan probe back on course.

9:08 am

A fourth engine burn has put India’s Mangalyaan probe back on course.

The unexpected abort during the previous burn occurred because engineers were testing the primary and secondary electrical coils that operate the engine’s valves.

During the firing on Monday morning, the team was trying to use both the primary and the redundant coils together as part of a trial. However, there was no fuel flow in this mode and the orbiter could not pick up the required velocity or reach the desired higher orbit. … A senior engineer involved in the process said, “Both the coils are working independently (but not if they are switched on together.)

Today’s burn demonstrated that nothing on the spacecraft has actually failed. As expected, simultaneous use of the two coils will no longer be attempted.

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Lunar Reconnaissance Orbiter inaugurates a new website of its images of the landing or impact sites of every human vehicle to arrive or crash on the Moon.

9:47 pm

Lunar Reconnaissance Orbiter inaugurates a new website of its images of the landing or impact sites of every human vehicle to arrive or crash on the Moon.

I found the site because they have a new release of images of the impact crater produced when Ranger 7 hit the Moon on July 28, 1964.

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India’s Mars Orbiter Mission experienced its first technical problem during an engine burn today.

10:16 am

India’s Mars Orbiter Mission experienced its first technical problem during an engine burn today.

As scientists tried to increase the speed of the satellite as it orbited Earth Monday, the flow of fuel to the craft’s main engine stopped. Backup thruster engines kicked in to keep the speed up and help raise the spacecraft’s orbit, but the satellite’s incremental velocity dipped, the Indian Space Research Organisation said.

The spacecraft was unable to reach the desired orbiting height of 100,000 kilometers. The satellite is currently orbiting at just over 78,000 km above Earth and scientists have now altered the mission plan to include an additional engine firing Tuesday to help it reach the correct height and incremental velocity of 130 meters a second.

Engineers seem confident that the spacecraft’s back up systems will be able to pick up the slack.

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During a five hour EVA that had lots of difficulties, two Russian cosmonauts took the Olympic torch on a spacewalk

9:21 am

During a five hour EVA yesterday that had lots of minor technical difficulties, two Russian cosmonauts took the Olympic torch on a spacewalk.

Most of the press is focusing on the PR stunt with the Olympic torch, but I think these issues are more interesting:

Working around the Service Module, Kotov and Ryazanski worked on cables at the RK21 site before attempting to fold up the panels on the hardware into its original configuration. The EVA tasks were mainly related to the preparations on the Urthecast pointing platform for installation of the HD camera in December. However, only the removal of the launch restraint from VRM EVA workstation and the disconnection of the RK-21 experiment were completed. The duo struggled with the relocation of the Yakor foot restraint – which they opted to take back to the airlock instead – while also failing to fold and lock RK-21 experiment antenna panels. While the spacewalkers managed to take a large quantity of photos for engineers on the ground to examine, the spacewalk was concluded after the failure to fold up the RK-21 panels, resulting in outstanding tasks for the next EVA.

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A Texas-based company has printed the first 3D-printed metal pistol, a 45 caliber Model 1911.

8:57 am

A Texas-based company has printed the first 3D-printed metal pistol, a 45 caliber Model 1911.

Video below the fold. The gun clearly functions, though I noticed that in the video they never loaded more three rounds in a magazine, and that the gun seems to cycle weakly. I suspect that they had some feeding problems when they tried to fire a full loaded five round magazine.

Nonetheless, this achievement further illustrates that 3D printing is about to become a major method of manufacture.
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A rare new microbe has been found in two different clean rooms, one in Florida and the other in South America.

7:49 pm

A rare new microbe has been found in two different clean rooms, one in Florida and the other in South America.

This population of berry-shaped bacteria is so different from any other known bacteria, it has been classified as not only a new species, but also a new genus, the next level of classifying the diversity of life. Its discoverers named it Tersicoccus phoenicis. Tersi is from Latin for clean, like the room. Coccus, from Greek for berry, describes the bacterium’s shape. The phoenicis part is for NASA’s Phoenix Mars Lander, the spacecraft being prepared for launch in 2007 when the bacterium was first collected by test-swabbing the floor in the Florida clean room.

Some other microbes have been discovered in a spacecraft clean room and found nowhere else, but none previously had been found in two different clean rooms and nowhere else. Home grounds of the new one are about 2,500 miles (4,000 kilometers) apart, in a NASA facility at Kennedy Space Center and a European Space Agency facility in Kourou, French Guiana.

Unlike the bacteria found on ISS, this microbe does not appear to pose any specific health problem. It does provide biologists with a good example of the kind of life that might survive in hostile environments like Mars.

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Students crash rockets into the ground on purpose! With video.

9:25 am

Students crash rockets into the ground on purpose! With video.

In what at first glance seems like a terrible sense of direction, in March students from the University of Washington fired rockets from kites and balloons at an altitude of 3,000 ft (914 m) straight into the ground at Black Rock, Nevada: a dry lake bed in the desert 100 mi (160 km) north of Reno. This may seem like the ultimate in larking about, but it’s actually a serious effort to develop new ways of collecting samples from asteroids.

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India has begun the countdown for the November 5 launch of its first Mars orbiter.

9:04 am

India has begun the countdown for the November 5 launch of its first Mars orbiter.

Just today, spacetoday.com lists fourteen different stories in the Indian press about this mission, all enthusiastic, thus indicating the excitement in that country over space exploration and this mission in particular. Nor is this event unusual. I’ve noted before how space happy India is. They not only want to catch up and pass their neighbor China, they want to catch up with the United States and Russia. Should be fun to watch.

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In preparation for November 5 launch of India’s first mission to Mars, ISRO successfully performed a full dress rehearsal countdown yesterday

8:59 am

In preparation for November 5 launch of India’s first mission to Mars, ISRO successfully performed a full dress rehearsal countdown yesterday.

We all cross our fingers and wish India well on this mission.

The article also had this additional tidbit that reveals a great deal about world culture:
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Bras in space: How a bra company made the spacesuits the astronauts wore on the Moon.

11:39 am

Bras in space: How a bra company made the spacesuits the astronauts wore on the Moon.

Fascinating interview, though I find it humorous how it is considered absurd and unlikely for a private company that makes bras to make these spacesuits. In truth, when the Apollo missions happened, Americans had no doubt that ordinary private businesses were the best places to go to get something novel and creative done.

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A fundamental design failure appears to be the cause of the fuel leak that caused the launch postponement of India’s first home-made geosynchronous powered rocket in August.

8:57 am

The complete failure of the fuel tank appears to be the cause of the massive leak that caused the launch postponement of India’s first home-made geosynchronous powered rocket in August.

Mr. Radhakrishnan [head of India’s space agency] said while the expert committee had attributed the fuel leak to stress corrosion cracking of the tank filled with propellants, exactly why this happened was “a research problem” that remains to be investigated. The next GSLV mission will switch to a better aluminium alloy material for its propellant tanks.

Up to now the reports have been somewhat vague about the cause of what was clearly an extensive leak. This story tells us that the tank essentially failed. As they filled it with propellants, cracks apparently showed up everywhere, with fuel spewing out in all directions. As far as I can remember, I don’t think there has ever been a rocket tank failure quite this spectacular.

This suggests there were fundamental design flaws in the tank or very serious quality control problems in its manufacture. With the next launch attempt scheduled for December 15, I hope India has identified the source of this incredibly basic problem and taken action to prevent it from happening again.

Update: Reader Patrick Ritchie found this older article which suggests the failed tank was an old tank of a design that was “prone for delayed cracks”. The error here then was in using this substandard old equipment rather than a newer tank.

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Sierra Nevada reveals that its Dream Chaser engineering test vehicle survived its bad landing in weekend in reasonably good shape.

5:06 pm

Sierra Nevada reveals that its Dream Chaser engineering test vehicle survived its bad landing this weekend in reasonably good shape.

After lining up on the runway, the spacecraft’s nose landing skid and right main landing gear deployed normally about 200 feet off the ground. But the left main gear hung up for some reason. Sirangelo said the software issued the proper commands, leading engineers to suspect a mechanical problem of some sort.

The landing gear in the test vehicle were taken from an F-5 training jet and will not be used on operational versions of the Dream Chaser.

In any case, the Dream Chaser’s flight software responded to the unbalanced load at touchdown, keeping the spacecraft’s left wing off the ground as long as possible. But it eventually came down and the craft skidded off the runway in a cloud of dust. [emphasis mine]

They should release the video. If the vehicle’s software was able to keep the vehicle stable, even as it was speeding down a runway short one wheel, this would impress people. Not releasing video of this only feeds the doubts people have.

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Sierra Nevada today released a video of the test flight this past weekend of its Dream Chaser engineering test vehicle.

9:07 am

Sierra Nevada today released a video of the test flight this past weekend of its Dream Chaser engineering test vehicle.

Don’t get too excited. They very cleverly have edited the tape so that we do not see what happened after touchdown. You can see how the left landing gear does not completely deploy, but then they cut away. Nonetheless, the video is posted below the fold.
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Sierra Nevada provides an update on the condition of its Dream Chaser test vehicle after this weekend’s glide flight and bad landing.

7:06 pm

Sierra Nevada provides an update on the condition of its Dream Chaser test vehicle after this weekend’s glide flight and bad landing.

SNC has not yet decided whether to repair the Dream Chaser test craft, which does not use the same landing gear the orbital vehicle would use. Investigating what went wrong will take “a couple of weeks,” Sirangelo estimated. He said the vehicle, which is now in a hangar in Mojave, Calif., was “fully intact” after the crash.

“The pressure vessel was completely pristine, the computers are still working, there was no damage to the crew cabin or flight systems,” Sirangelo said. “I went inside it myself and it was perfectly fine. There was some damage from skidding.

“We learned everything we wanted to on this test, and learned more than we expected to learn,” Sirangelo said. “We believe we’ve got most of the data we need [but] I can’t honestly say, I just don’t know yet. It’s not going to affect our schedule in the long term [but] It might affect whether we do another free flight test this year or next year. We’re still assessing that.”

The company also claims that the flight met the requirements of a $15 million NASA milestone payment, since the goals of the flight were to test the vehicle’s flight capabilities, not its landing gear. (The failed landing gear used will not be the gear used on the final flight vehicle.)

They have scheduled a press conference for tomorrow. Stay tuned.

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Lockheed Martin successfully powered up the first Orion capsule last week.

7:00 pm

Lockheed Martin successfully powered up the first Orion capsule last week.

During the test, operators in the Test Launch and Control Center (TLCC) introduced software scripts to the crew module’s main control computers via thousands of wires and electrical ground support equipment. During this process, the foundational elements, or the “heart and brains” of the entire system were evaluated. The main computers received commands from the ground, knew where to send them, read the data from different channels, and successfully relayed electrical responses back to the TLCC. The crew module power systems will continue to undergo testing for six months as additional electronics are added to the spacecraft.

It is a good thing that NASA has finally gotten this far with this very expensive capsule. However, pay no attention to their claims that the capsule “is capable of taking humans farther into space than they’ve ever gone before.” Any long journey it takes will be quite limited in scope. Humans can’t really travel beyond lunar orbit in just a capsule. You need a real interplanetary spaceship for that, and Orion does not fit this bill.

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Why governments can’t do it

10:46 am

A government official today unwittingly revealed a fundamental and unpleasant truth about how governments: operate. In an interview today, the head of India’s space agency denied that his country is in a space race with anyone.

Mr. Radhakrishnan, Secretary in the Department of Space and Chairman of Space Commission, said each country — whether it’s India, the US, Russia or China — had their own priorities.

“There is no race with anybody. If you look at anybody, they have their own direction. So, I don’t find a place for race with somebody. But I would say we are always on race with ourselves to excel in areas that we have chalked out for ourselves,” he told PTI here in an interview.

How typical. By denying the reality of the competition that India is part of Mr. Radhakrishnan illustrates for me and everyone once again the basic reason all government efforts eventually fail.
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