Archeologists think they have located the wreck of Christopher Columbus flagship, the Santa Maria, from his 1492 voyage.
Archeologists think they have located the wreck of Christopher Columbus flagship, the Santa Maria, from his 1492 voyage.
Tag: engineering
The U.S.’s most capable deep-sea unmanned research sub has been lost more than six miles deep in the Pacific.
The U.S.’s most capable deep-sea unmanned research sub has been lost more than six miles deep in the Pacific.
A news story today reports that cracks have been discovered in the wings of WhiteKnightTwo.
More problems for Virgin Galactic: A news story today reports that cracks have been discovered in the wings of WhiteKnightTwo.
Sources tell me the cracks are along the spars that run the length of the wings. Specifically, they are located where the spars connect with the fuselage. My sources tell me the cracks have caused quite a bit of concern among the engineers at Virgin and Scaled. One particularly worrisome aspect is that nobody knows why or when they occurred.
I’m told there is some comfort in the repairs being made based on previous Scaled experience in patching composites. However, since the cause of the cracks is uncertain and WhiteKnightTwo is unique in terms of its size and the stresses placed on it by SpaceShipTwo, the engineers are in uncharted territory. They don’t know if they have addressed the root cause, or whether the problem will reoccur.
If this story turns out to be trie, it will likely be a disaster for Virgin Galactic. Not only can they not yet fly SpaceShipTwo because of engine issues, the mother ship that puts the spacecraft into the air can’t fly either.
Does the auction sale of an Excalibur Almaz capsule signal the end of this manned space commercial company?
Does the auction sale of an Excalibur Almaz capsule signal the end of this manned space commercial company?
It certainly looks that way, which is tragic in that the company had a very smart and viable idea: Use already built Soviet-era manned space equipment to launch a space hotel and provide a ferry to it for a relatively low cost. The development was already done and the hardware already built. All they had to do is refurbish and update things.
Ground tests of SpaceShipTwo’s engines continue.
Ground tests of SpaceShipTwo’s engines continue.
No flight tests have occurred in four months, however, which suggests that they have decided to abandon their first engine design and are now doing these new ground tests to prove the reliability of the new engine before proceeding to flight tests. The lack of flight tests also suggests that Richard Branson’s most recent announcement that he will definitely fly as a passenger this year is most likely hogwash.
The trip of what is essentially a circuit breaker on ISS has reduced the station’s power by about 12.5%.
The trip of what is essentially a circuit breaker on ISS has reduced the station’s power by about 12.5%.
The cause and solution has not yet been isolated. The loss of power at this point is not critical, and has not effected any experiments or the safety of the crew.
The article itself gives a very detailed and informative outline of the system and what has happened, though you have to spend the time to wade through the alphabet soup of NASA terminology — SSU, SAWs, VDC, DCSUs, MBSUs, DDCUs, POR — that NASA uses.
Building a scale model of the International Space Station — using matchsticks!
Building a scale model of the International Space Station — using matchsticks!
Recently completed by Acton, the wooden ISS is as impressive in size as it is in detail. Comprised of 282,000 matchsticks, the 1/26 scale model required 8 gal (30 L) of glue and took roughly 1,950 hours to complete. Whereas the actual ISS measures out at 108.5 m (356 ft) wide and 72.8 m (239 ft) long, Acton’s scaled down version measures out at an impressive 4.1 m (13.5 ft) and 2.8 m (9.2 ft) wide. Solar arrays, trusses, communication components, and even the Space Shuttle Atlantis, are all there in intricate detail.
With pictures.
Fact checking Elon Musk’s statements about his company’s efforts to reuse the Falcon 9 first stage reminds us of some space history and one of Musk’s chief competitors.
Fact checking Elon Musk’s statements about his company’s efforts to reuse the Falcon 9 first stage reminds us of some space history and one of Musk’s chief competitors.
The bottom line: Bringing the first stage back to Earth safely and vertically is doable, and has been done before.
Because of issues preventing a dress rehearsal countdown and launchpad static fire of the Falcon 9 rocket SpaceX has delayed Saturday’s launch.
Because of issues preventing a dress rehearsal countdown and launchpad static fire of the Falcon 9 rocket SpaceX has delayed Saturday’s launch.
No new date has yet been set, but I expect the delay will not be long.
In response to the Obama administration’s request a judge has lifted her injunction against the purchase of Russian rocket engines for the Atlas 5 rocket.
In response to the Obama administration’s request a judge has lifted her injunction against the purchase of Russian rocket engines for the Atlas 5 rocket.
More here. It appears that, at least for the moment, the Atlas 5 rocket will be allowed to buy these engines. Whether the Russians will continue to allow them to buy them however remains an open question, especially if things in the Ukraine get worse.
Bertha is stuck under Seattle and the taxpayers are going to have to pay millions, if not billions, to get the giant drilling machine moving again.
Bertha is stuck under Seattle and the taxpayers might be required to pay millions, if not billions, to get the giant drilling machine moving again.
Failures like this do happen, but to me they seem to happen routinely to modern big government projects. I wonder why.
Ten modern conveniences we take for granted that didn’t exist before 1970.
Ten modern conveniences we take for granted that didn’t exist before 1970.
I especially like the picture of the audio cassette and the pencil with the caption, “Our children will never know the link between the two.”