Tag: commercial

Don’t buy stock yet in that “impossible” space drive

7:46 pm

The uncertainty of science and engineering: A physicist takes a close and skeptical look at the “impossible” space drive that NASA engineers discovered seemed to work. Key quote:

“All in all,” Lee concluded, “it will take a lot more information before we can judge whether the thrust is really a thrust or not.”

Read the whole article. They point out the areas of doubt and weakness, as well as the possibilities.

Leave a comment

NASA confirms “impossible” drive

10:30 pm

Life imitates science fiction: NASA engineers have confirmed the functionality of an “impossible” space thruster drive.

British scientist Roger Shawyer has been trying to interest people in his EmDrive for some years through his company SPR Ltd. Shawyer claims the EmDrive converts electric power into thrust, without the need for any propellant by bouncing microwaves around in a closed container. He has built a number of demonstration systems, but critics reject his relativity-based theory and insist that, according to the law of conservation of momentum, it cannot work.

According to good scientific practice, an independent third party needed to replicate Shawyer’s results. As Wired.co.uk reported, this happened last year when a Chinese team built its own EmDrive and confirmed that it produced 720 mN (about 72 grams) of thrust, enough for a practical satellite thruster. Such a thruster could be powered by solar electricity, eliminating the need for the supply of propellant that occupies up to half the launch mass of many satellites. The Chinese work attracted little attention; it seems that nobody in the West believed in it.

However, a US scientist, Guido Fetta, has built his own propellant-less microwave thruster, and managed to persuade Nasa to test it out. The test results were presented on July 30 at the 50th Joint Propulsion Conference in Cleveland, Ohio. Astonishingly enough, they are positive.

Since no one understands the physics that are producing the thrust, it is wise at this point to be very skeptical of these results. A lot more testing and experimentation will be necessary before this can be made practical.

However, if it is what they think it is, it will make it possible to turn sunlight into thrust, meaning that spacecraft will no longer need fuel, and will be able to go places much faster using the constant thrust this drive will provide.

7 comments

Dream Chaser air frame unveiled

10:16 pm

The competition heats up: Sierra Nevada and Lockheed Martin today unveiled the composite airframe that will be used for the Dream Chaser spacecraft.

Essentially this is the first major structural component of the actual spacecraft. Lockheed was chosen by Sierra Nevada as the subcontractor to build it because of that company’s extensive experience with composites. It also gets them bonus points in Congress by using this powerful well placed company with many employees in important Congressional districts.

One comment

Another new launch company completes flight test

8:50 am

The competition heats up: Generation Orbit this week completed a test flight of its air launch rocket system for putting small payloads into space.

The flight was to test the handling and flight characteristics of the aircraft to be used to release the launchers.

The company is planning two different air-launched systems, one to put small payloads into suborbital space, another to put 100 pound payloads into orbit. In both cases they are targeting the science and educational community that builds cubesats and has been in desperate need of its own launch services for decades.

Leave a comment

Clarence White & Roland White – I Am A Pilgram/Soldiers Joy

6:01 pm

An evening pause: Performed live on Bob Baxter’s “Guitar Workshop” in 1973. Hat tip to jwing, who wrote the following when he sent me the link:

Clarence was instrumental in making flat-picking guitar a lead solo instrument in bluegrass, along with Doc Watson. He played as a session musician for many groups in the 60’s such as the Everly Brothers and The Monkees. Later he became the lead guitarist for Roger McGuinn’s Byrds. He developed the B-string bender invention that you can hear on the Eagles’ song “Take It Easy.” Sadly, in 1973 while packing up the band’s van after a late night gig he was hit by a drunk driver and was killed. A huge loss to music. This video was recorded in LA only a few months before that fateful night. Enjoy a true virtuoso.

One comment

A new cheap rocket company

8:43 am

The competition heats up: A New Zealand company says it is building a rocket capable of launching cubesats into orbit for only $5 million.

Rocket Lab says it is building a carbon-composited launch vehicle –named Electron—which will send small satellites into earth’s orbit for five million U.S. dollars. The U.S. company, which is building the vehicle in New Zealand, expects the first to be ready next year and already has committed to its first 30 launch slots.

Though their low cost will once again increase the space launch customer base, they are not really in competition with any of the big players, who don’t really make their money launching cubesats. Instead, by focusing on the cubesat market, Rocket Lab is aimed at providing launch services to a niche that has, up until now, had no real launch services. If a university or small company wanted to launch a cubesat., they had to piggyback on a large launch.

One comment

SpaceShipTwo flies again

9:44 pm

The competition heats up: For the first time in six months SpaceShipTwo completed a test flight today.

The article above is from NBC, which also has a deal with Virgin Galactic to televise the first commercial flight. It is thus in their interest to promote the spacecraft and company. The following two sentences from the article however clearly confirm every rumor we have heard about the ship in the past year, that they needed to replace or completely refit the engine and that the resulting thrust might not be enough to get the ship to 100 kilometers or 62 miles:

In January, SpaceShipTwo blasted off for a powered test and sailed through a follow-up glide flight, but then it went into the shop for rocket refitting. It’s expected to go through a series of glide flights and powered flights that eventually rise beyond the boundary of outer space (50 miles or 100 kilometers in altitude, depending on who’s counting).

Hopefully this test flight indicates that they have installed the new engine and are now beginning flight tests with equipment that will actually get the ship into space.

Leave a comment

ISEE-3 engine restart fails but the private effort continues

11:57 am

After numerous tries, the private effort to put ISEE-3 back into its original orbit has failed.

We have completely accomplished all of our original goals except for one: firing the ISEE-3 propulsion system in a sufficient fashion to alter its trajectory. We did operate the propulsion system briefly so as to correct the spin of the spacecraft, and to start the trajectory correction maneuver. The propulsion system works fine. The problem is that there is no longer any Nitrogen pressurant left in its tanks to allow it to work.

36 years and more than 30 billion miles have taken its toll on the spacecraft’s propulsion system. We have exhausted every option to bring the engines online so as to conduct the correction maneuver required to place it in its planned orbit. Without the pressurant it just won’t work.

Have they given up? No! Though the spacecraft will remain in a solar orbit where maintaining communications will be difficult if not impossible, they are going to try anyway, and are even going to run another crowd-sourcing campaign to finance it.

Leave a comment

Amazon’s 3D printshop opens

9:20 am

The competition heats up: Amazon has opened its first 3D-print shop, where customers can buy 3D printed products.

The store has launched with more than 200 print-on-demand designs. Users can customize items like earrings, pendants, rings and bobble head dolls using a special widget, before having the item 3D-printed and delivered. …

Although users of the store cannot upload and print their own designs, it is, as mentioned, possible to customize some of the available designs. Amazon has built a customization engine into the store, allowing for very simple changes to an item’s design, or more wholesale changes. Interactive 3D preview functionality is also provided, with which users can rotate an object and view it from any angle.

What does this story have to do with space exploration? Well, it marks the beginning of a major revolution in manufacturing that will change everything. And since 3D printing is going to be an essential need for future space explorers, having this new industry prosper and grow can only speed up the exploration and settlement of the solar system.

2 comments

SpaceX launch schedule heats up

9:48 am

A close look at SpaceX’s launch schedule through the rest of 2014 calls for six Falcon 9 launches, including two before the end of August.

If the company is successfully in maintaining this schedule, they will end any doubts about their ability to transform the launch industry. Every other launch company will have to match their prices, or lose their customers.

One paragraph in the article does tell us that there are limits to the re-usability of the Falcon 9 first stage, even if they do succeed in bringing it back safely to a vertical landing on land.
» Read more

5 comments

Commercial communications satellites for Mars?

8:03 am

The competition heats up? NASA is considering a different commercial approach for providing communications to and from its Mars probes.

The purpose of NASA’s request for information, or RFI, released July 23 “is to explore new business models for how NASA might sustain Mars relay infrastructure, consisting of orbiters capable of providing standardized telecommunication services for rovers and landers on the Martian surface, in the Martian atmosphere, or in Mars orbit,” according to a posting on the Federal Business Opportunities website.

According to the post, NASA will use information it receives from respondents to inform its future Mars exploration strategies, but the agency has not decided to pursue a commercial interplanetary telecom initiative. “We are looking to broaden participation in the exploration of Mars to include new models for government and commercial partnerships,” said John Grunsfeld, associate administrator of NASA’s science mission directorate, in a statement. “Depending on the outcome, the new model could be a vital component in future science missions and the path for humans to Mars.” [emphasis mine]

It is important to highlight the fact that NASA has not yet made a decision on this issue. The best thing the agency could do, in my opinion, would be to step back, design nothing, but let private companies bid on providing the service. The expertise at many of the private satellite companies providing communications efficiently and inexpensively to private customers worldwide would easily provide NASA better communications at Mars for less money.

In other words, like manned flight and cargo delivery to ISS, NASA should simply become a customer, and let private companies build and own the products that NASA buys.

5 comments

SpaceX scores first in its suit against the Air Force

11:12 pm

A federal judge has denied the motion of the Air Force and ULA to dismiss SpaceX’s suit against their block buy launch contract that excludes competition from any other company.

The judge also required the parties go to mediation to settle their differences. Both rulings give added weight to SpaceX’s main complaint, that the company as well as others should have the right to compete for this Air Force launch work.

2 comments

Sierra Nevada signs deal with Japan

9:14 am

The competition heats up: Japan has signed a development agreement with Sierra Nevada in connection with its Dream Chaser manned spacecraft.

I was also tempted to preface this post with the phrase, “Who needs NASA?” Sierra Nevada has a viable product that can get humans into space cheaply. Several countries, Germany, now Japan, want to get their own citizens into space, and have realized what a bargain Dream Chaser is. Sierra Nevada is taking advantage of this demand to sell its product worldwide. If Congress decides to defund them, or NASA decides not to pick them to continue development, they very clearly intend to build the ship anyway. It just won’t be used to put American astronauts into space.

3 comments

Falcon 9 soft lands on water

6:55 pm

SpaceX claimed in a press release on Tuesday that it had successfully completed a soft splashdown of the first stage of its Falcon 9 rocket in its launch earlier this month.

Video below the fold. The quality is not great because of a buildup of ice on the camera, but it does show they were able to restart the engines twice after separation. It also shows the landing legs deploy just before the stage hovers above the water.
» Read more

11 comments

Eddi Reader – Galileo

6:01 pm

An evening pause:

Galileo fell in love as a Galilean boy
And he wondered what in heaven, who’d invented such a joy.
But the question got the better of his scientific mind
And to his blind and dying day
He’d look up high and love and sighed and sometimes cried,
Who puts the rainbows in the sky?
Who lights the stars in the night?
Who dreamt up someone so divine?
Someone like you and made them mine?

Leave a comment

The 707 turns 60

12:11 am

The sixtieth anniversary of Boeing’s 707 passenger jet and how it changed aviation history.

The pictures are cool, but read it for the history. Sixty years ago the ability of ordinary citizens to span the globe quickly and easily suddenly became possible, and that ability has changed the world.

4 comments

Rick Wakeman – keyboard solo

6:01 pm

An evening pause: Thanks to Danae again for this.

I am still looking for Evening Pause suggestions. I found late last year that I could no longer keep it up by myself. If you have something you think would be worth posting, make a comment here and I will email you. Don’t post the link, let me check it out first and then schedule it.

3 comments

Europe readies its own space plane for test flight

8:06 am

The competition heats up: Europe ‘s Intermediate eXperimental Vehicle (IXV) is undergoing its final tests before it does a suborbital test flight in November.

IXV will be launched into a suborbital trajectory on ESA’s small Vega rocket from Europe’s Spaceport in French Guiana, the vehicle will return to Earth as though from a low-orbit mission. For the first time, it will test and qualify European critical reentry technologies in hypersonic flight, descend by parachute and land in the Pacific Ocean to await recovery and analysis. IXV is manoeuvrable and able to make precise landings—it is the ‘intermediate’ element of Europe’s path to future developments with limited risks. …

When IXV splashes down in the Pacific at the end of its mission it will be recovered by ship and returned to Europe for detailed analysis to assess the performance and condition of the internal and external structures. The actual performance will be compared with predictions to improve computer modelling of the materials used and the spaceplane’s design.

Though exciting, Europe will have to pick up the pace from its normally slow pace on these kinds of projects if it expects to be competitive. In the past, they would stretch out the development as long as they could in order to keep the cash flowing. This won’t work in the increasingly robust aerospace market that exists today.

Leave a comment
1 … 258 259 260 261 262 … 306