NASA expands work to boost tank strength
Good news: NASA decides to do more to strengthen the shuttle’s external tank.
Good news: NASA decides to do more to strengthen the shuttle’s external tank.
Tag: engineering
NASA expands work to boost tank strength
Bigelow and his international customers
Who says there’s a lack of customers for private space? Clark Lindsay, with the help of Trent Waddington, provides a list of the six nations that have signed a deal with Bigelow Aerospace to buy space on the company’s privately-built space stations.
Who says there’s a lack of customers for private space? Clark Lindsay, with the help of Trent Waddington, provides a list of the six nations that have signed a deal with Bigelow Aerospace to buy space on the company’s privately-built space stations.
Electric cars are wonderful — except no ones buying
What does this story really tell us? Electric cars are wonderful — except that the dealer hasn’t sold any.
What does this story really tell us? Electric cars are wonderful — except that the dealer hasn’t sold any.
Three to four Billion Barrels of Oil Assessed in North Dakota and Montana
Black gold! Three to four billion barrels of oil — 25 times more than previously predicted — are now thought to lie under certain geological formations in North Dakota and Montana.
Black gold! Three to four billion barrels of oil — 25 times more than previously predicted — are now thought to lie under certain geological formations in North Dakota and Montana.
Peter Kogler computer animation in museum
Imaging the ground under the Greenland ice sheet
In a paper published today in Geophysical Research Letters of the American Geophysical Union, scientists describe how they have been able to produce remarkably detailed images of the ground buried almost a mile under the ice sheet of Greenland. These radar techniques are the same used in the past by spacecraft to image the hidden surface of Venus, only far more sophisticated.
This image from the paper compares the radar image of the Greenland surface (on the left) to an photograph of a known surface feature in the Northwest Territories of Canada, produced thousands of years ago by the giant icesheets of the last Ice Age. Both are at the same scale, about a third of a mile across, and are looking at the surface at an oblique angle of about 45 degrees. With the radar-produced image on the left, sunlight is simulated as coming from the right, with the elevation increasing as the colors go from green (lowest) to yellow to brown to purple (highest).
The long grooves, generally 30 to 100 feet deep and extending sometimes several miles, are produced as the icesheet slides across the ground. In the radar image, however, these grooves are slowly being ground out now.
It is the resolution of this technique that is so exciting. That they can look through ice almost a mile thick and resolve objects that are only tens of feet across tells me that someday it will be possible for spacecraft to map the smallest features on the surface of Venus or Titan. More exciting, this suggests that the technology will one day exist to even map the unknown surface of gas giants like Jupiter or Saturn, and do it in breathtaking detail.
Yowza!
A private science mission to an asteroid?
A proposal to revive a project to send a private science probe to an asteroid.
The original project, NEAP, was proposed back in 1997 by the late Jim Bensen of SpaceDev (now Sierra Nevada). Benson wanted to not only do research, but he planned to claim the asteroid as his property upon landing. Though his proposal never flew, it was clearly a forerunner to today’s resurgence of the private space industry, and in many ways kickstarted that resurgence.
A proposal to revive a project to send a private science probe to an asteroid.
The original project, NEAP, was proposed back in 1997 by the late Jim Bensen of SpaceDev (now Sierra Nevada). Benson wanted to not only do research, but he planned to claim the asteroid as his property upon landing. Though his proposal never flew, it was clearly a forerunner to today’s resurgence of the private space industry, and in many ways kickstarted that resurgence.
NASA rules out early February launch for shuttle Discovery
NASA management has once again delayed the launch of Discovery, pushing it back to late February in order to finish repairs to its external tank.
NASA management has once again delayed the launch of Discovery, pushing it back to late February in order to finish repairs to its external tank.
Launch Date Set For First Orbital Sciences COTS Demo
December 14 has been set as the target date for the first test launch of Orbital Sciences’s commercial ferry to ISS. Key quote:
The flight is scheduled to include delivery of a token cargo load using Orbital’s first Cygnus visiting vehicle, a service module combined with a pressurized cargo module.
December 14 has been set as the target date for the first test launch of Orbital Sciences’s commercial ferry to ISS. Key quote:
The flight is scheduled to include delivery of a token cargo load using Orbital’s first Cygnus visiting vehicle, a service module combined with a pressurized cargo module.
Two old unused Soviet Almaz space stations sold to private company
Two old unused Soviet Almaz space stations have been sold to a private company and have arrived in their new home on the Isle of Man. Key quote:
The stations will be initially stored in Jurby, but there plans for research, testing and possible launch into orbit.
For those who do not know, the Almaz station was built in the 1970s by the Soviet Union to do manned military reconnaissance. Two manned Almaz stations were eventually flown, Salyut 3 and Salyut 5. The station hull itself became the fundamental module for all subsequent Soviet/Russian stations, including Mir and ISS.
Two old unused Soviet Almaz space stations have been sold to a private company and have arrived in their new home on the Isle of Man. Key quote:
The stations will be initially stored in Jurby, but there plans for research, testing and possible launch into orbit.
For those who do not know, the Almaz station was built in the 1970s by the Soviet Union to do manned military reconnaissance. Two manned Almaz stations were eventually flown, Salyut 3 and Salyut 5. The station hull itself became the fundamental module for all subsequent Soviet/Russian stations, including Mir and ISS.
Charles Bolden has come out of hiding
Today NASA administrator Charles Bolden spoke at the AIAA meeting in Orlando. According to Florida Today, he said two things of interest:
- He is proud of the achievements of the shuttle program and is sad the program is ending.
- He believes flying three more shuttle missions would be safe.
Considering that his administration has done nothing to save the program, and in fact has almost seemed eager to shut it down at times, his sadness seems incredibly insincere and self-serving.
As for his second comment about the shuttle’s safety, I wonder how he knows this, especially since his own engineers are currently struggling to pin down the root cause of the external tank cracks that have delayed the last flight of Discovery, and appear to be a chronic problem that needs to be fixed before any shuttle can once again fly.
Japan may make second try at Akatsuki-Venus rendezvous one year earlier than planned
Japan may try to put Akatsuki into orbit around Venus five years from now, rather than six.
Japan may try to put Akatsuki into orbit around Venus five years from now, rather than six.
Root cause of tank cracks possibly found
NASA engineers think they might have found the root cause of the cracks that have been appearing on the shuttle external tank. The cracks appear on structural units called stringers. Key quote:
“Some material used for the stringers was found to be ‘mottled,’ with a different surface appearance than the standard material. Testing revealed this mottled material had lower fracture toughness than the nominal material and exhibited unstable crack growth. All of the cracks found during tanking as well as cracks fixed during manufacturing were located on stringers made with this mottled material.”
NASA engineers think they might have found the root cause of the cracks that have been appearing on the shuttle external tank. The cracks appear on structural units called stringers. Key quote:
“Some material used for the stringers was found to be ‘mottled,’ with a different surface appearance than the standard material. Testing revealed this mottled material had lower fracture toughness than the nominal material and exhibited unstable crack growth. All of the cracks found during tanking as well as cracks fixed during manufacturing were located on stringers made with this mottled material.”
Engineers considering repairs to shuttle tank
NASA engineers are considering giving Discovery’s external tank the equivalent of a girdle in order to keep it from developing more cracks during launch. Key quote:
If that decision is made, it is unlikely NASA could complete the work, repair the tank’s foam insulation and get Discovery back out to the launch pad in time to support a launch attempt during the next available window, which opens Feb. 3 and closes Feb. 10. Work to beef up all 108 stringers at the top of the intertank almost certainly would delay Discovery’s launch on a space station resupply mission to the next available window, which opens Feb. 27 and closes in early March.
NASA engineers are considering giving Discovery’s external tank the equivalent of a girdle in order to keep it from developing more cracks during launch. Key quote:
If that decision is made, it is unlikely NASA could complete the work, repair the tank’s foam insulation and get Discovery back out to the launch pad in time to support a launch attempt during the next available window, which opens Feb. 3 and closes Feb. 10. Work to beef up all 108 stringers at the top of the intertank almost certainly would delay Discovery’s launch on a space station resupply mission to the next available window, which opens Feb. 27 and closes in early March.
Discovery tank repairs ongoing
The repairs to the cracks on Discovery’s external tank continue, with the hope for a February 3 launch.
The repairs to the cracks on Discovery’s external tank continue, with the hope for a February 3 launch.
Skyscrapers 2010 – The World’s Tallest Buildings
China has unveiled the world’s longest sea bridge
China today unveiled the world’s longest sea bridge, stretching 26.4 miles and three miles longer than the previous record holder.
China today unveiled the world’s longest sea bridge, stretching 26.4 miles and three miles longer than the previous record holder.
Snapped connectors led to Indian rocket failure
Snapped connectors led to the failure last week of India’s GSLV rocket.
Snapped connectors led to the failure last week of India’s GSLV rocket.
NASA Wraps Up X-ray Scans of external tank
Updated and bumped: The inspections reveal four additional cracks on Discovery’s external tank.
NASA engineers have finished a series of x-ray scans of Discovery’s external tank.
Updated and bumped: The inspections reveal four additional cracks on Discovery’s external tank.
NASA engineers have finished a series of x-ray scans of Discovery’s external tank.
‘Zombie’ Satellite Comes Back to Life
“Zombie” satellite comes back to life.
“Zombie” satellite comes back to life.
Russian space officials fired over satellite crash
Russian space officials are fired over rocket failure.
Russian space officials are fired over rocket failure.
Hilarious Error Messages (31 pics)
Why I use Linux: Hilarious Windows error messages. This is typical:
Windows has detected that you have moved your mouse. Please restart your computer.
Why I use Linux: Hilarious Windows error messages. This is typical:
Windows has detected that you have moved your mouse. Please restart your computer.
Astronauts4hire taking applications
Want to become an astronaut? The private company Astronauts4Hire is taking applications.
Want to become an astronaut? The private company Astronauts4Hire is taking applications.
India’s geosynchronous rocket fails at launch
Bad news for India’s space program: It’s geosynchronous rocket, GSLV, failed today less than two minutes after launch. Key quote:
[The Indian Space Research Organization (ISRO)] has had a troubled past with GSLV, with only two of the seven launches so far claiming total success. Though ISRO claims that four launches had been successful, independent observers call at least two of them either failure or partial success. When it comes to launching its workhorse PSLV, ISRO has had 15 consecutive successes.
Bad news for India’s space program: It’s geosynchronous rocket, GSLV, failed today less than two minutes after launch. Key quote:
[The Indian Space Research Organization (ISRO)] has had a troubled past with GSLV, with only two of the seven launches so far claiming total success. Though ISRO claims that four launches had been successful, independent observers call at least two of them either failure or partial success. When it comes to launching its workhorse PSLV, ISRO has had 15 consecutive successes.
Flying on empty to a comet
Flying on empty to a comet.
Flying on empty to a comet.
China Matches U.S. Space Launches for First Time
The new colonial movement: For the first time China has matched the U.S. in space launches. Note that though the above article implies it, the U.S. has quite often not been the yearly leader in launches, as Russia has often topped the list. Nonetheless, with China now becoming more competitive the future of space travel can only get bettter.
The new colonial movement: For the first time China has matched the U.S. in space launches. Note that though the above article implies it, the U.S. has quite often not been the yearly leader in launches, as Russia has often topped the list. Nonetheless, with China now becoming more competitive the future of space travel can only get bettter.
A Martian eclipse
The hubbub about this week’s lunar solstice eclipse was, from my perspective, mostly manufactured press blather. For those who had never seen a lunar eclipse, it was a spectacular experience, but there really was nothing scientifically or technically unique about the fact that it happened to occur on the solstice.
However, below is an eclipse that is definitely unique both technically and scientifically. Scientists using the Mars rover Opportunity have filmed an eclipse on Mars, showing the Martian moon Phobos crossing in front of the Sun. Consider the engineering accomplishment: not only did they need to be able to calculate exactly when this would happen at a very particular spot on the Martian surface, they had to have a camera there able to take the movie. And they had to operate it from Earth!
SS2 Glide Tests Exceed Expected Progress
The glide tests of SpaceShipTwo have exceeded expectations, and are ahead of schedule.
The glide tests of SpaceShipTwo have exceeded expectations, and are ahead of schedule.
Solar Sail Flotilla Could Divert Possibly Dangerous Asteroid
Another scheme to stop a dangerous asteroid: Use a flotilla of solar sails to divert Apophis.
Another scheme to stop a dangerous asteroid: Use a flotilla of solar sails to divert Apophis.
How Close to the Sun could we get?
How close to the Sun could we get?
How close to the Sun could we get?