Tag: spaceflight

Bringing Dream Chaser home

9:47 am

The competition heats up: At an space industry conference this week Sierra Nevada outlined the ability of Dream Chaser to land at almost any airport, including the many financial and safety advantages of that flexibility.

The story notes that because Dream Chaser would not need an unusually long runway, it could land at most airports. Also, because it would have no hazardous materials on board, removing it from the runway after landing would be simple and straightforward. You would simply tow it away. The biggest advantage of this, howevr, is that if the spacecraft was docked at ISS and there was an emergency that required immediate evacuation, bringing Dream Chaser and its passengers home to a runway will be possible any time.

This presentation is part of Sierra Nevada’s sales effort to find new backers for their spacecraft, now that NASA has begged out. I think they make a good sales pitch. I hope someone with money agrees.

15 comments

The November 12 timeline of events for Philae’s landing on a comet

10:16 am

ESA has released a detailed timeline of events on November 11-12, when Rosetta’s Philae lander will be released and land on Comet 67P/C-G. They have also released a much more readable summary of the most critical events, describing what will be happening.

For Americans, these events will be occurring from around 3 pm (Eastern) November 11, when the process begins, to 12 pm (Eastern) November 12, when Philae will send back the first signals after landing. Much of the most critical events will take place in the wee hours of the morning.

Meanwhile, one of Rosetta’s instruments has confirmed the presence of water vapor and carbon dioxide in the jets seen near the comet’s narrow neck.

Leave a comment

Orion heat shield redesigned before its launch?

9:59 am

Even before Orion’s first flight next month to test its heat shield, engineers are proposing a major change in the shield’s design and manufacture.

The Orion heat shield’s titanium skeleton and carbon fiber skin was fabricated by Lockheed Martin — the craft’s prime contractor — in Colorado. The skeleton was shipped to Textron Defense Systems in Massachusetts for installation of a fiberglass-phenolic honeycomb structure. More than 330,000 individual cells make up the honeycomb, and Textron technicians — using a special dispensing gun — filled the cells by hand with a material called Avcoat. The Avcoat insulation is supposed to ablate away during the Orion spacecraft’s re-entry, protecting the underlying structure from searing temperatures. The Apollo moon capsule used the same type of manually-applied material for its heat shield, and it worked so well Lockheed Martin and NASA decided to dust off the design.

Engineers scaled up the heat shield for the Orion crew capsule, which is about four feet wider at its base than the Apollo command module. “That’s what worked for Apollo, and that’s what we’ll work with for this mission,” Bray said, referring to the EFT-1 launch in December.

But a review of the heat shield on the Orion spacecraft set for launch Dec. 4 revealed the Avcoat was slightly more uneven than expected, according to Jim Bray, crew module director at Lockheed Martin, Orion’s prime contractor.

It also appears that it is too expensive to build the shield by hand, as it was done during Apollo. Instead, they intend to build future heat shields as single blocks assembled not by hand but by machine.

This is another example of why SLS/Orion is an incredible money black hole. What is the point of next month’s test flight of the heat shield if the shield they are testing is not going to be used on future flights?

Meanwhile, the press (apparently ignorant and uninformed about this subject and brainwashed by a NASA Orion press event) is filled with numerous stories claiming that this test flight is NASA’s first step to getting to Mars. What hogwash.

I especially like this quote from the space.com article:

On Dec. 4, NASA officials are expected to launch the Orion spacecraft on its first test flight, putting the capsule through its paces in space before it splashes down in the Pacific Ocean. The goal of the flight is to see how some key Orion systems — like its huge heat shield and parachutes — work before launching humans into deep space sometime in the future. [emphasis mine]

Yet, most of the heat shield test data obtained by this test flight will be worthless and inapplicable to future Orion capsules. In other words, this test flight is, as I said, hogwash, a public relations stunt to sell Orion to Congress and to uneducated reporters. It is also an enormous waste of taxpayer money and the limited resources NASA has.

8 comments

Solid rocket motors for American rockets?

9:34 am

The competition heats up: Even as ULA and Blue Origin begin work building an American engine to replace the Russian engines on the Atlas 5 rocket, ATK is offering its solid rocket motors for both Atlas 5 as well as Antares.

The company’s sales pitch is that they can get their product ready faster and cheaper. And since they are merging with Orbital Sciences anyway, I will not be at all surprised if Antares ends up with ATK solid rocket motors for its first stage.

As for Atlas 5, this sales pitch is actually aimed at Congress, which could step in and force ULA to buy ATK motors instead of Blue Origin’s new engine, even if this switch is against the wishes of ULA. As foolish as this might seem, the politics of pork (ATK provides more jobs than Blue Origin) could make it happen.

One comment

A pause in investment commitment to Virgin Galactic

9:19 am

The heat of competition: Virgin Galactic’s Arab investors have decided to hold off further commitment to the project until the investigation of the SpaceShipTwo crash is completed.

The backing of deep-pocketed Aabar Investments, run by the Abu Dhabi government, may be crucial to Virgin Galactic as it struggles to recover from the accident, which killed one test pilot and left another seriously injured. “As an investor, Aabar is concerned of course. It is a challenge – nothing can be decided until investigations are over,” the source said, declining to be named because of the sensitivity of the subject. “For now, it is a wait-and-watch situation.” Asked if Aabar was still committed to Virgin Galactic, the source said only: “There is time to make an assessment of the future strategy.”

This is hardly a surprise. Nor does it guarantee an end to Richard Branson’s company. What it signals is a recognition that Virgin Galactic has had a serious problem and must demonstrate that it can fix that problem before it will regain the trust of its investors.

3 comments

Second SpaceShipTwo almost ready for flight

8:32 am

The heat of competition: Virgin Galactic today released hanger photos of the almost finished second SpaceShipTwo.

Even as the investigation into the fatal breakup of Virgin Galactic’s SpaceShipTwo rocket plane continues in Mojave, California, the next SpaceShipTwo is more than halfway complete in a Mojave hangar — and is expected to start going through tests on the ground and in the air next year.

Virgin Galactic’s manufacturing subsidiary, The Spaceship Company, has been working on the plane for two and a half years. It’s variously known as SpaceShipTwo Tail No. 2 or N202VG, and it’s part of Virgin Galactic plan to have a fleet of five SpaceShipTwo rocket planes and two WhiteKnightTwo carrier planes.

This story is a great example of the public relations genius of Richard Branson. Even with the pieces of SpaceShipTwo still being picked up on the ground he finds a way to sell his company positively to the world. They not only intend to continue their effort, they have the ship to prove it!

One comment

Turbopump failure in first stage engine eyed for the Antares launch failure

8:14 am

The investigation into the launch failure of the Antares rocket one week ago is now focusing on the turbopump in one of the rocket’s first stage engines.

“The Investigation Board (AIB) is making good progress in determining the primary cause of last week’s failure. A preliminary review of telemetry and video data has been conducted and substantial debris from the Antares rocket and its Cygnus payload has been collected and examined,” noted Orbital on Wednesday. “While the work of the AIB continues, preliminary evidence and analysis conducted to date points to a probable turbopump-related failure in one of the two Aerojet Rocketdyne AJ26 stage one main engines. As a result, the use of these engines for the Antares vehicle likely will be discontinued.”

It was later noted that the AJ-26 could still be used if they were proven to be completely flight-worthy.

If Orbital Sciences decides to completely cease using the Russian engines, it could mean a very significant delay before they can launch again, maybe several years. If they do that, I expect them to face contract penalties from NASA for the failure to deliver cargo to ISS on a reasonable schedule. It will also mean that their chances of winning a second contract will go down significantly.

They need to replace the engine, but they also need to keep launching. The article as well as a company press release today describes how they are exploring other launch vehicles, including the Falcon 9, to launch Cygnus, but I see no reason for them to completely abandon the Russian engines immediately. What they need to do is find what failed, fix it in the remaining engines, and keep flying while they scramble hard to replace the engine entirely.

2 comments

A geological score for Curiosity!

10:25 pm

Spectroscopy from Curiosity’s most recent drilling has been found to match and thus confirm the spectroscopy of the same spot taken years ago from orbit.

In observations reported in 2010, before selection of Curiosity’s landing site, a mineral-mapping instrument on NASA’s Mars Reconnaissance Orbiter provided evidence of hematite in the geological unit that includes the Pahrump Hills outcrop. The landing site is inside Gale Crater, an impact basin about 96 miles (154 kilometers) in diameter with the layered Mount Sharp rising about three miles (five kilometers) high in the center.

“We’ve reached the part of the crater where we have the mineralogical information that was important in selection of Gale Crater as the landing site,” said Ralph Milliken of Brown University, Providence, Rhode Island. He is a member of Curiosity’s science team and was lead author of that 2010 report in Geophysical Research Letters identifying minerals based on observations of lower Mount Sharp by the orbiter’s Compact Reconnaissance Imaging Spectrometer for Mars (CRISM). “We’re now on a path where the orbital data can help us predict what minerals we’ll find and make good choices about where to drill. Analyses like these will help us place rover-scale observations into the broader geologic history of Gale that we see from orbital data.”

This is a significant finding. Not only does this data now prove that the orbital data is correct, it demonstrates that scientists can now use that orbital data to direct Curiosity to even more interesting geological surface features. In fact, this ground-based data will help them calibrate all their orbital data more precisely, thus making our geological knowledge of Mars more accurate and reliable.

Leave a comment

Update on SpaceShipTwo investigation

8:20 am

Additional details about the investigation into the crash of SpaceShipTwo have now been released.

The investigators are focusing on the telemetry that the pilots were receiving, as well as the system for activating the ship’s braking feathering system.

As I have noted in the comments, we must try not to speculate on this subject, especially because this issue could do harm to innocent people. For example, some reports have incorrectly attributed the crash to pilot error. To say this now is false. All the investigation has noted is that the co-pilot took the first step to activating the feathering system, as he was supposed to do, though slightly early. The feathering system then deployed on its own, without the second command being given.

We do not yet know the finer details that make his action significant, or not. This is why the investigation is checking into the telemetry the pilots were getting, which might have affected when they did what they did.

We need to wait for more data.

Leave a comment

Some Virgin Galactic customers demand money back

5:22 pm

News reports suggest that — following last week’s SpaceShipTwo crash — more than thirty of the seven hundred people who placed deposits with Virgin Galactic to fly on SpaceshipTwo have pulled out, demanding their money back.

In response to the claim that more than 30 customers are considering their position in the aftermath of the crash, a spokesperson for Virgin Galactic admitted a number of people have asked for their money back. “We can confirm that less than three per cent of people have requested refunds,” the spokesman said.

This is not a surprise, nor should it be. A company can only survive a crisis like this by responding honestly, quickly, and directly. If Virgin Galactic does this, finding the cause of the crash and fixing it, they will likely hold onto most of their customers. If they don’t, those remaining customers will leave. This week’s cancellations are the first immediate response to the crash. The future of the company, however, will be determined by what happens in the next six months.

4 comments

SpaceShipTwo’s engine did not cause failure

8:39 am

The investigation into the failure of SpaceShipTwo last week during a powered flight test has determined that the accident was not caused by the spaceship’s engine and that the spaceship’s feathering system for return to Earth began deploying early during powered flight.

The ship’s fuel tanks and its engine were recovered intact, indicating there was no explosion. “They showed no signs of burn-through, no signs of being breached,” Christopher Hart, acting chairman of the National Transportation and Safety Board, told reporters at the Mojave Air and Space Port in Mojave, Calif

Instead, data and video relayed from the ship show its hallmark safety feature — a foldable tail section designed for easy re-entry into the atmosphere from space — was deployed early.

More here. Deployment required two commands, activation and then deployment. Data shows that the co-pilot Michael Alsbury activated the system slightly early. The second command, however, was not given, but the feathering system began to deploy nonetheless, during powered flight when the ship was accelerating upward. That is when the ship broke up.

Leave a comment

SpaceShipTwo accident pilots identified

9:36 pm

As the National Transportation Safety Board (NTSB) begins its investigation into the SpaceShipTwo test flight failure, the identities of the two pilots have finally been released.

The Kern County Coroner’s Office announced Nov. 1 that Michael Alsbury, a 39-year-old test pilot employed by Scaled Composites, was the person killed in the crash of the vehicle north of Mojave, California. Scaled Composites confirmed that identification in a press release issued late Nov. 1, which also stated that the pilot injured in the crash was the company’s director of flight operations, Peter Siebold. Alsbury was the co-pilot of SpaceShipTwo on its first powered flight, in April 2013. According to public flight logs maintained by Scaled Composites, he most recently flew SpaceShipTwo as co-pilot on an unpowered test flight on Aug. 28, a “cold flow” test where nitrous oxide was vented through the engine but not ignited.

Siebold was the pilot or co-pilot of SpaceShipTwo on its previous four flights, including the Aug. 28 flight with Alsbury. Siebold was also a pilot on several test flights of SpaceShipOne, an earlier suborbital spaceplane developed by Scaled Composites that won the $10-million Ansari X Prize in 2004. In the statement, Scaled Composites said that Siebold was “alert and talking with his family and doctors,” but provided no other details about his condition.

Alsbury should receive the same honor given to all other astronauts and pilots who have sacrificed their lives so that humans will someday leave the surface of the Earth.

Leave a comment

New rocket coming from ULA?

12:45 pm

The competition heats up: The head of ULA hints that the company is developing a new rocket.

“Today, we have Atlas and Delta,” Bruno said of ULA’s product line. The company is completing studies leading to an announcement early next year of “what we will have next.” He confirmed, “It could be a new rocket.”

It could be that they have seen the writing on the wall and realize that Atlas and Delta are simply too expensive to compete with SpaceX and have decided they need to come up with something better. I hope so.

Leave a comment

Rosetta gets in position to release Phalae

9:36 am

Rosetta has successfully maneuvered into position prior to releasing Philae on November 12 for landing on Comet 67P/C-G.

The thruster burn took place starting at 02:09:55 UTC (03:09:55 CET), ran for 90 seconds and, based on an initial analysis of spacecraft radiometric data, delivered a delta-v – change in speed – of 9.3 cm/sec, as confirmed by the Rosetta Flight Dynamics team. It was the second and final of two ‘deterministic’ (i.e. direction and thrust are prepared in advance) manoeuvres that moved Rosetta onto the planned lander delivery orbit, now at a height of about 30 km, which will be maintained right up until the pre-delivery manoeuvre at two hours before separation at 08:35 UTC (09:35 CET) on the morning of 12 November.

…[T]he next planned orbit-changing manoeuvres will occur on the 12th at (a) 2 hours before separation and (b) about 40 minutes after, in between which Philae will be released. The pre-delivery manoeuvre will shift Rosetta’s trajectory so that the orbiter would be on a path so as to pass over the comet at a distance of 5 km, while the separation will occur at 08:35 UTC on board the spacecraft about 22 km (the confirmation signal will arrive on Earth at 09:03 UTC).

Since Philae is a passive lander, firing no thrusters but simply being thrown gently at the comet by Rosetta, the last two burns are crucial. The first literally puts Rosetta on the same collision course as Philae so that when the lander is released it is on a course to hit the comet. The second takes Rosetta out of that collision course, since no one wants it to hit the comet also.

Leave a comment

“The sky is crying.”

9:19 am

Words from Mohave.

Friday began bright and sunny, a day full of promise that quickly brought tragedy. As I write this early on Saturday, a cold hard rain is lashing at my windows. That’s a good thing. We need it.

And it feels right. The sky is crying, adding to an ocean of tears shed here today.

One comment

The Earth/Moon double planet, as seen by China’s Chang’e 5 probe

10:00 am

Earth/Moon as seen by Chang'e 5

China’s Chang’e 5 probe has taken a spectacular image of the Moon and Earth as it whips around the Moon on its circumlunar test flight.

Though China has released little additional information about the status of the mission, this image demonstrates that the vehicle is functioning well, sending back data, and that they are controlling its operation precisely and exactly as planned. The spacecraft is scheduled to return to Earth on November 1.

Meanwhile, China’s second lunar probe, Chang’e 2, now in solar orbit about 60 million miles from Earth, continues to operate four years after launch

Leave a comment

A mysterious piece of Russian space junk does maneuvers!

9:43 am

What was first thought to be a piece of debris left over from the launch of three Russian military communication satellites has turned out to be a fourth satellite capable of maneuvers.

The three satellites were designated Kosmos-2496, -2497, -2498. However, as in the previous launch on December 25, 2013, the fourth unidentified object was detected orbiting the Earth a few kilometers away from “routine” Rodnik satellites.

Moreover, an analysis of orbital elements from a US radar by observers showed that the “ghost” spacecraft had made a maneuver between May 29 and May 31, 2014, despite being identified as “debris” (or Object 2014-028E) in the official US catalog at the time. On June 24, the mysterious spacecraft started maneuvering again, lowering its perigee (lowest point) by four kilometers and lifting its apogee by 3.5 kilometers. Object E then continued its relentless maneuvers in July and its perigee was lowered sharply, bringing it suspiciously close to the Briz upper stage, which had originally delivered all four payloads into orbit in May.

This is the second time a Russian piece of orbital junk has suddenly started to do maneuvers. The first time, in early 2014, the Russians finally admitted five months after launch that the “junk” was actually a satellite. In both cases, the Russians have not told anyone what these satellites are designed to do, though based on the second satellite’s maneuvers as well as its small size (about a foot in diameter) it is likely they are testing new cubesat capabilities, as most cubesats do not have the ability to do these kinds of orbital maneuvers.

Once you have that capability, you can then apply it to cubesats with any kind of purpose, from military anti-satellite technology to commercial applications.

Leave a comment

Ex-construction boss at Vostochny arrested

9:31 am

The man formerly in charge of construction at Russia’s new spaceport in Vostochny has been arrested and charged with stealing $43 million dollars from the project.

The corruption might be true, as this kind of thing is culturally typical for the centralized government-run operations that are generally favored in Russia. It is also possible that Putin’s government wanted a scapegoat to blame for the construction delays and cost overruns in building Vostochny.

Either way, Putin gets what he wants. This prosecution will make it very clear to everyone involved in building Vostochny that the government wants it built fast and without further theft, and it is watching what people do there very closely.

One comment

Controversy surrounding IXV flight cancellation

9:24 am

Italian officials are suggesting politics or incompetence for the sudden cancellation Wednesday of the November test flight of Europe’s IXV experimental spaceplane.

ESA and CNES officials up to now have either declined to comment or, in the case of ESA, said they were at a loss to explain why a program whose mission profile has not changed in several years is now suddenly stalled for [range] safety issues that in principle should have been aired and resolved long ago.

One official, saying he could not believe that the two agencies simply forgot to evaluate the safety issues, said he preferred to suspect political motives. “Look, we are about to send a spacecraft and lander to Mars, in one year,” this official said. “Europe has rendezvoused with a comet a decade after the [Rosetta comet-chaser] satellite was launched. You want me to believe that somehow the agencies just forgot to evaluate safety? That is too far-fetched. I would rather believe there is some political motive.”

The claim is that no one ever evaluated the range issues in sending the Vega rocket to the east instead of its normal polar orbit trajectory. The Italian officials are suggesting that either the officials who cancelled the mission are incompetent, or that their competition with France within ESA over launch vehicles (Ariane 6 vs Vega) prompted the cancellation.

Europe’s lead launch-vehicle nation is France, which initially balked at participating in the Vega program. A French minister said that in Europe, launch vehicles are French. The French government declined to allow the export, to Italy, of the avionics suite that guides Vega, forcing Italy to develop its own. Italy has since done so and successfully flown it on Vega. As it stands now, one official said, France must accept the idea that with Vega, Italy has led development of a vehicle that at least in principle resembles an intercontinental ballistic missile. “Some people don’t like that,” this official said.

Either way, this cancellation combined with the difficult and extended disagreements within ESA over replacing Ariane 5 suggest that the future of this European partnership is becoming increasingly shaky.

Leave a comment

Atlas 5 successfully launches GPS satellite

9:29 am

ULA’s Atlas 5 rocket today successfully launched an Air Force GPS satellite.

The article is worth reading because it does a nice job of summarizing the launch history of the Atlas 5, first introduced in 2002. The key quote, however, is this:

All of the rocket’s early flights carried commercial communications satellites, with the next few launches orbiting HellasSat-2, Rainbow 1, AMC-16 and Inmarsat-4F1. In August 2005 the sixth Atlas V embarked on the type’s first mission for the US Government, deploying NASA’s Mars Reconnaissance Orbiter on the first leg of its mission to the Red Planet.

In other words, the first six flights were commercial, with every flight since 2005 for either NASA or the military. What this suggests to me is that the Atlas 5 is not competitive in the commercial market. It is too expensive, and commercial customers can’t afford it. In contrast, the federal government hasn’t been interested in saving the taxpayer money for years, and pays for this overpriced rocket in order to keep its builders employed.

Leave a comment

Test flight of European space plane delayed

9:33 am

The November suborbital test flight of Europe’s Intermediate eXperimental Vehicle (IXV) has been delayed to allow additional preparation.

For this mission, instead of heading north into a polar orbit, as on previous flights, Vega will head eastwards to release the spaceplane into a suborbital path reaching all the way to the Pacific Ocean to test new technologies for future autonomous controlled reentry for return missions. This trajectory is unprecedented for Vega and therefore more information is being generated on the performance of the launch vehicle, should an anomaly occur after liftoff.

ESA will not only be testing the flight characteristics of the space plane, they will be testing their new Vega rocket, which has only been launched a handful of times.

Leave a comment

First chemical results from Rosetta

9:24 am

Spectroscopy from Rosetta has identified the make-up of a single dust grain captured by the spacecraft.

For the convenience of communications the science team had dubbed this single grain “Boris.”

[T]hese first results show that among the grain’s components are magnesium and sodium. Since 95 percent of the known observed minerals in comets resemble olivine and pyroxenes – containing a lot of magnesium – the detection of this element is not a big surprise. But, finding sodium in the dust grain, in a refractory mineral phase, has sparked our interest considerably.

The coma and tails of other comets are already known to contain sodium; it was observed in the dust samples returned from Comet Wild 2 by NASA’s Stardust mission, and a prominent example was also the sodium tail of Comet Hale-Bopp that flew past the Sun in April 1997 and which could be seen in the night sky for many weeks. However, by contrast, neither sodium nor magnesium were observed in Comet 67P/C-G dust grains before sampling the inner coma dust. But our dust grain Boris has showed off with clear sodium and magnesium mass peaks in the secondary ion mass spectra that we obtained.

Their next goal is to identify where on the surface of Comet 67P/C-G this sodium came from.

Leave a comment

LADEE impact site located

8:47 am

Lunar Reconnaissance Orbiter has spotted the impact crater formed when engineers sent the probe LADEE crashing into the lunar surface in April 2014.

Compared with asteroid and meteoroid impacts on the moon, LADEE was actually traveling pretty slow, ‘only’ 3,800 miles per hour (1,700 meters per second). That combined with the relatively low mass and density of the spacecraft, a fairly neat crater of only 10 feet (3 meters) across was created. The crater barely registered in LROC’s image resolution, making it a very difficult task to identify the fresh man-made divot.

Leave a comment
1 … 384 385 386 387 388 … 479