SpaceX has delayed its February 7 launch of Dragon to ISS
SpaceX has delayed its February 7 launch of Dragon to ISS.
Tag: engineering
Geothermal energy developers plan to pump 24 million gallons of water into a dormant volcano in Oregon this summer to demonstrate a new way to generate electricity.
Geothermal energy developers plan to pump 24 million gallons of water into a dormant volcano in Oregon this summer to demonstrate a new way to generate electricity.
The irony I glean from this article is this: Pumping water underground to produce energy from geothermal sources (a source liked by the environmental movement) is good. However, pumping water underground to produce energy from gas or oil (energy sources hated by the environmental movement) is bad. And yet, what difference really is there between either effort?
Phobos-Grunt has crashed into the Pacific Ocean
No harm done: Phobos-Grunt has crashed into the Pacific Ocean, west of Chile.
Phobos-Grunt due to crash to Earth anytime in the next ten hours
Updated and bumped. An updated prediction from Aerospace now calls for Phobos-Grunt to come down sometime between 9 and 3 pm (Eastern). This puts the U.S. now out of danger, though Europe, South America, Africa, Australia, and the southern half of Asia all remain in the spacecraft’s path.
Watch your heads! Phobos-Grunt is due to crash to Earth anytime in the next ten hours. And unfortunately, this new prediction has it flying over both North America and much of Europe and Africa during that time period.
Six Small Math Errors That Caused Huge Disasters
It real does pay to learn math when you are in school: Six small math errors that caused huge disasters.
NASA is soliciting private aerospace companies to bid on building their designs for rocket upper stage that will send the Orion capsule beyond Earth orbit.
NASA is soliciting private aerospace companies to bid on building their own designs for the rocket upper stage that will send the Orion capsule beyond Earth orbit.
This is good news: Rather than design the upper stage themselves, NASA is behaving like a customer and looking for someone else to provide them the product, much as the agency has been doing in buying from private companies crew and cargo services for ISS. Using this approach the agency is more likely to get its upper stage quickly and at less cost.
Engineers have gone to a back up radio system on Cassini after a primary unit did not respond as expected in late December.
Engineers have gone to a back up radio system on Cassini after a primary unit did not respond as expected in late December.
The cause is still under investigation, but age may be a factor. The spacecraft launched in 1997 and has orbited Saturn since 2004. Cassini completed its prime mission in 2008 and has had two additional mission extensions. This is the first time its ultra-stable oscillator has had an issue.
LightSquared seeks an investigation into one of the GPS advisory board members that said their system interferes with GPS
LightSquared has announced that it is seeking an investigation into the GPS advisory board which said its system interferes with GPS.
On Thursday, the mobile broadband startup petitioned the Inspector General of NASA to investigate Bradford Parkinson, the vice chairman of a board that advises the government on GPS. Parkinson should be removed from discussions about potential interference between GPS and LightSquared’s proposed LTE (Long Term Evolution) network because he is also a director of GPS vendor Trimble Navigation, LightSquared said in its petition.
As lawyers say, when you’ve got the facts, pound the facts. When the facts are against you, pound the law. And when the law is against you, pound the table. Right now, LightSquared is pounding the law, as the technical results of the GPS investigation were quite clear: their system will interfere with most commercial and military GPS units.
That they went to the NASA Inspector General is instructive, since NASA has nothing to do with this issue.
Note that the law is also against LightSquared. I expect them to soon start pounding the table.
X-Prize offers $10 million prize for anyone who can build McCoy’s tricorder
Life imitates art: The X-Prize announced today a $10 million prize for anyone who can build McCoy’s tricorder from Star Trek.
The X PRIZE Foundation and Qualcomm Foundation said the prize, announced at the Consumer Electronics Show in Las Vegas, will go to the team that “develops a mobile platform that most accurately diagnoses a set of 15 diseases across 30 consumers in three days,” a release from the the two foundations said. The device must be light enough to be portable, weighing no more than 5 pounds.
Phobos-Grunt’s reentry this weekend
Watch your head this weekend: The re-entry of Phobos-Grunt has been refined, and is expected to come down sometime between 5 pm (Eastern), Saturday January 14 and 9 am (Eastern), Monday January 16.
As you can see by the image on the right, there is as yet no way to predict where it will land, though it appears that — except for the tip of Florida — North America is in the clear. The blue lines show its orbital path during the first half of this window, while the yellow lines show its path during the window’s second half.
SpaceX outlines its new design goals for Falcon 9
What competition brings: SpaceX outlines its new design goals for Falcon 9 and its Merlin rocket engine.
[U]pcoming upgrades to the engine (Merlin 1D) will provide a vast improvement in performance, reliability and manufacturability – all of which could provide a timely boost to aiding the potential for success for the fully reusable Falcon 9.
Increased reliability: Simplified design by eliminating components and sub-assemblies. Increased fatigue life. Increased chamber and nozzle thermal margins,” noted SpaceX in listing the improvements in work.
Improved Performance: Thrust increased from 95,000 lbf (sea level) to 140,000 lbf (sea level). Added throttle capability for range from 70-100 percent. Currently, it is necessary to shut off two engines during ascent. The Merlin 1D will make it possible to throttle all engines. Structure was removed from the engine to make it lighter.
Improved Manufacturability: Simplified design to use lower cost manufacturing techniques. Reduced touch labor and parts count. Increased in-house production at SpaceX.
That’s just the engine. Most of the article however talks about the company’s effort to make as much of Falcon 9 reusable as possible. Hat tip to Clark Lindsey.
How it’s made – Bubble gum
An evening pause: Some important engineering.