Tag: engineering

An eleven year old’s experiment in brewing beer in space will fly to ISS on the next Cygnus cargo flight in December.

6:17 pm

An eleven year old’s experiment in brewing beer in space will fly to ISS on the next Cygnus cargo flight in December.

The tiny brewery is set up inside a 6-inch-long (15 centimeters) tube, filled with separated hops, water, yeast and malted barley — all of the key ingredients used to make beer — and will be delivered to the station by the commercial firm NanoRacks. An astronaut aboard the station will shake up the mixture to see how the yeast interacts with the other ingredients in the beer. “I really didn’t expect this from the start,” Bodzianowski told KDVR, a Fox affiliate in Denver. “I really just designed my experiment to get a good grade in my class.”

2 comments

Engineers hope Juno’s Earth flyby yesterday will help solve a mystery seen in previous flybys by unmanned probes.

5:32 am

The uncertainty of science: Engineers hope Juno’s Earth flyby yesterday will help solve a mystery seen in previous flybys by unmanned probes.

Since 1990, mission controllers at ESA and NASA have noticed that their spacecraft sometimes experience a strange variation in the amount of orbital energy they pick up from Earth during flybys, a technique routinely used to fling satellites deep into our Solar System. The unexplained variation is noticed as a tiny difference in the expected speed gained (or lost) during the passage.

The variations are extremely small: NASA’s Jupiter probe ended up just 3.9 mm/s faster than expected when it swung past Earth in December 1990. The largest variation– a boost of 13.0 mm/s – was seen with NASA’s NEAR asteroid craft in January 1998. Conversely, the differences during swingbys of NASA’s Cassini in 1999 and Messenger in 2005 were so small that they could not be confirmed.

The experts are stumped.

It is likely that these small variations are related in some way with simple engineering and not some unknown feature of gravity. Nonetheless, it remains a mystery.

6 comments

After the unmanned probe Juno zipped past the Earth on its way to Jupiter today, it unexpectedly went into safe mode.

9:28 pm

After the unmanned probe Juno zipped past the Earth on its way to Jupiter today, it unexpectedly went into safe mode.

Engineers continued to diagnose the issue, which occurred after Juno whipped around Earth in a momentum-gathering flyby. Up until Wednesday, Juno had been in excellent health. While in safe mode, it can communicate with ground controllers, but its activities are limited.

It is unclear at the moment why this happened.

One comment

In a newspaper interview Richard Branson today claimed that Virgin Galactic is “just three months away from having a fully-functioning rocket that is capable of taking passengers into orbit.”

5:46 am

In a newspaper interview Richard Branson today claimed that Virgin Galactic is “just three months away from having a fully-functioning rocket that is capable of taking passengers into orbit.”

At this moment I am sadly very skeptical. The company has only done two powered flights of SpaceShipTwo, and the highest it has gone is about 70,000 feet. To make it fully-functioning, they need to fly it 70 miles high. And the rumors about their engine problems suggest they won’t be able to do this until next year, at the soonest.

One comment

A drone that can fly continuously for five years at 65,000 feet.

6:34 pm

A drone that can fly continuously for five years at 65,000 feet.

The Solara series are designed to be a fraction of the cost of a satellite, but operate many similar tasks, such as surveillance, crop-monitoring, weather and disaster oversight, or any other monitoring that low-altitude satellites track. The Solara aircraft could cost less than $2 million, according to Forbes, which quotes Dustin Sanders, Titan’s chief electrical engineer, as saying, “We’re trying to do a single-million-dollar-per-aircraft platform. And the operation cost is almost nothing — you’re paying some dude to watch the payload and make sure the aircraft doesn’t do anything stupid.”

As with any new invention, the use of this drone carries with it both good and bad possibilities.

One comment

Because India depends on the American Deep Space communications network — mostly unavailable due to the government shutdown — the launch of its first Mars probe, set for October 28, might have to be delayed for two years.

11:00 pm

Because India depends on the American Deep Space communications network — mostly unavailable due to the government shutdown — the launch of its first Mars probe, set for October 28, might have to be delayed for two years.

This is unfortunate news indeed. However, if I was India (as well as other countries) I would consider this a call to develop their own deep space network.

One comment

Stratolaunch has now released some preliminary details about its commercial rocket, including images.

11:00 pm

Stratolaunch has now released some preliminary details about its commercial rocket, including images.

Work has also begun on assembling the giant carrier airplane that will be used to take the rocket aloft.

Posted from lovely Williamsport, Pennsylvania. Tomorrow I will be busy visiting old friends as well as poking around an old Pennsylvania ghost town, so posting should be light.

2 comments

Virgin Galactic has signed a television deal for a reality show where the winner would get a flight into space on SpaceShipTwo.

7:52 am

Virgin Galactic has signed a television deal for a reality show where the winner would get a flight into space on SpaceShipTwo.

This sounds great, but the company first has to solve the very serious engineering problems it has with SpaceShipTwo’s engine, which apparently is going to cause a delay of at least one year in the ship’s development. Thus, this announcement is really nothing more than a publicity stunt designed to distract the public from those problems.

Leave a comment

Orbital Sciences is suing the government agency that operates the Wallops Island spaceport, saying it is refusing to pay a $16.5 million bill.

7:43 am

Orbital Sciences is suing the government agency that operates the Wallops Island spaceport, saying it is refusing to pay a $16.5 million bill.

I am not surprised. One of the prime reasons the launch of Antares and Cygnus was delayed by more than a year was because this same government agency had failed to upgrade the launchpad as promised, and Orbital Sciences was eventually forced to step in, take over, and spend millions to do the work itself.

Leave a comment

After developing the J-2X engine for the upper stage of its SLS heavy-lift rocket, NASA now plans to mothball it.

7:18 am

NASA marches on! After developing the J-2X engine for the upper stage of its SLS heavy-lift rocket, NASA now plans to mothball it.

While the agency is actively seeking other missions for the heavy-lift Space Launch System (SLS) in the planetary science and military arenas, most of the human flights it has in sight for the big new rocket probably can be accomplished with an upper stage powered by the RL-10 engine instead of the J-2X. “The J-2X for certain [design reference missions] is somewhat overpowered,” said Todd May, NASA’s SLS program manager.

The main cause of this absurd situation is Congress, which has micro-managed the development of SLS from day one.

3 comments

The failure of the Falcon 9 upper stage prior to a final engine test on Sunday’s launch may delay the rocket’s next commercial launch.

6:52 pm

The failure of the Falcon 9 upper stage prior to a final engine test on Sunday’s launch may delay the rocket’s next commercial launch.

SpaceX officials said after the Sept. 29 launch that the nonignition of the upper stage did not appear to be of a sort to delay the SES flight for very long. Feltes said SES is will hoping for a launch as soon as October, but added that if it slipped to November the company was willing to wait. The fact that SES will be awaiting details from SpaceX “does not mean that we reject the flight as a qualification flight,” Feltes said. “We still plan to be on the next Falcon flight, once SpaceX has solved the problem. But we need a technical explanation. We do need reignition of the stage for our satellite.”

The government shutdown also means that the Florida spaceport is presently unavailable for this launch (which is hardly a way to run a commercial operation). This fact makes it even more likely that SpaceX will eventually move all its commercial launches to its own spaceport, probably in Texas.

Leave a comment

SpaceX is denying rumors that the upper stage of its Falcon 9 rocket exploded after completing its mission.

4:17 pm

SpaceX is denying rumors that the upper stage of its Falcon 9 rocket exploded after completing its mission.

The speculation was spawned in part by the fact that the U.S. Space Surveillance Network is currently tracking more orbital objects associated with the launch than expected. … “Regarding the rumors you may have heard about the Falcon 9 second stage, in short, our data confirms there was no rupture of any kind on the second stage,” SpaceX spokeswoman Emily Shanklin wrote in an Oct. 1 email. “Following separation of the satellites to their correct orbit, the Falcon 9 second stage underwent a controlled venting of propellants … and the stage was successfully safed. During this process, it is possible insulation came off the fuel dome on the second stage and is the source of what some observers incorrectly interpreted as a rupture in the second stage.” SpaceX attempted to reignite the upper stage after payload separation in a demonstration of a capability it will need to place satellites into the proper geostationary transfer orbit. However, the reignition sequence was aborted after a problem was detected, SpaceX Chief Executive Elon Musk told reporters in a postlaunch teleconference.

Anything is possible, but I am inclined to believe SpaceX in this case. Moreover, even if true, the bottom line is that the rocket launch was still a complete success, putting its payloads in orbit as promised.

Leave a comment

“I respectfully inform you hereby that I am disinclined to join in any more mandatory radicalism.”

7:42 pm

“I respectfully inform you hereby that I am disinclined to join in any more mandatory radicalism.”

The written words of a college teachers assistant to his professor. He wrote these words after deciding he can no longer attend any mandatory “diversity” training sessions after the last session. Click on the link and read his letter. You will find it most educational. It also describes nicely a good example of modern leftwing civility.

3 comments

Russia’s Proton rocket returned to flight today with a successful launch of a commercial satellite.

4:21 pm

Russia’s Proton rocket returned to flight today with a successful launch of a commercial satellite.

This launch only occurred about two hours ago and all appears at this time to be going well. For the Russians this is a crucial flight, as they need to demonstrate that they are cleaning up their quality control problems following the spectacular Proton launch failure in July in order to compete in the increasingly competitive launch market.

Leave a comment

SpaceX successfully launched its upgraded Falcon 9 rocket today, putting its first commercial payload into orbit.

4:13 pm

SpaceX successfully launched its upgraded Falcon 9 rocket today, putting its first commercial payload into orbit.

They also attempted to restart both the first and second stages after separation to test the possibility of eventually getting them back to Earth undamaged.

Two post-mission burns of the boost stage were attempted. The first, involving three of the rocket’s nine first-stage Merlin 1D engines, was successful in slowing its descent into the atmosphere. But SpaceX was unable to carry out a second burn of a single engine after the stage went into a spin and ran out of fuel due to what Musk described as a centrifuge effect. The second burn was intended to further slow the first stage’s descent, and because it did not take place as planned, the stage hit the ocean hard, Musk said. Parts of the first stage had been recovered, he added.

The restart of the second stage never occurred due to what Elon Musk called “minor” issues.

The successes today of both Falcon 9 and Cygnus once again demonstrate the advantages of allowing private companies the freedom to design and build rockets they then own and can sell on the open market. The cost to get these space vehicles built was far lower than anything NASA has built in decades, and both got finished much faster as well.

Getting into space can only get cheaper and faster from here.

3 comments

Japan’s H-2A rocket, built by Mitsubishi, has won its first commercial contract.

9:06 pm

The competition heats up: Japan’s H-2A rocket, built by Mitsubishi, has won its first commercial contract.

This is a surprise, as Japan has tried for years to sell the H-2A to commercial satellite carriers, with no success. That they have finally succeeded suggests to me that the demand for launch services is increasing, and there is room for more companies to provide the service.

Leave a comment

India has now rescheduled the launch of its home-built GSLV rocket for December 15.

9:09 am

India has now rescheduled the launch of its home-built GSLV rocket for December 15.

The launch of Geosynchronous Satellite Launch Vehicle (GSLV), which was deferred on August 19 following a flaw in the rocket, will take place on December 15, ISRO head said here today. “The launch of GSLV D5 satellite which was postponed on August 19 about two hours before liftoff after detection of a fuel leak in the rockets’ second stage will now be held on December 15,” ISRO chairman Dr K Radhakrishnan said at an interactive session with students and teachers here.

Leave a comment

Due to problems developing SpaceShipTwo’s engine, it appears that its first flight into space will not occur sooner than February 2014

9:06 am

Due to problems developing SpaceShipTwo’s engine, it appears that its first flight into space will not occur sooner than February 2014, and that commercial operations will likely not begin before the end of 2014.

The problem is that despite public claims to the contrary, the nitrous oxide-rubber hybrid has never been hot fired on the ground at full duration, sources indicate. And the engine is not powerful enough even when fully fired to get SpaceShipTwo into space with any actual payloads (i.e., six wealthy passengers). Even as Scaled Composites has pursued the flight test program and Virgin Galactic has issued optimistic flight predictions that commercial flights are only months away, the two companies have been secretly working on alternatives to the nitrous oxide-rubber engine they have been using to explore SpaceShipTwo’s flight envelope. Sources report that the development of alternative hybrid designs has been running into trouble. An engine that used nitrous oxide and nylon exploded on Scaled Composites test stand on May 17. The nozzle and rocket casing were thrown clear and the test stand was wrecked. The composite tank holding the nitrous oxide did not explode, but it was damaged to the point where it could not be reused.

This is very bad news. To develop a new engine at this late stage of development will be quite difficult. The spaceship itself was designed specifically with the first engine in mind. Any replacement will likely be different in power and design and require some changes to the ship.

7 comments
1 … 424 425 426 427 428 … 505