Tag: engineering

Engine problems on a Delta 4 rocket launch two weeks ago could delay the launch of the Atlas 5 rocket scheduled to lift the X-37B on its next mission.

8:52 am

Engine problems on a Delta 4 rocket launch two weeks ago could delay the launch of the Atlas 5 rocket scheduled to lift the X-37B on its next mission.

Don’t ask me why the military would delay an Atlas 5 launch because of problems on a Delta 4. It seems to be left over caution from the 1960s, when no rocket was reliable and they were trying to figure out how to do it. Now, it simply seems silly.

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Orbital Sciences has delayed the first demo launch of its Cygnus cargo capsule until March 2013 at the earliest.

10:16 pm

Orbital Sciences has delayed the first demo launch of its Cygnus cargo capsule until March 2013 at the earliest.

The schedule for Antares itself has not been delayed. Launchpad tests are still scheduled to begin next week, with the first engine test set for early November, and the first launch of Antares set for December.

They don’t explain the reason for the Cygnus delay. I suspect they simply decided to be realistic. It was always unlikely that the first Cygnus launch would follow only a month after the first Antares launch, especially if there are any kinks in that launch.

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Blue Origin has successfully tested its new hydrogen/oxygen rocket engine.

9:27 am

The competition heats up: Blue Origin has successfully tested its new hydrogen/oxygen rocket engine.

This would be the second new American rocket engine since the 1980s, following SpaceX’s Merlin engine. That it uses hydrogen/oxygen is also significant, as these fuels provide the highest ratio of power to weight. (As far as I remember, the shuttle was the only other spacecraft to use hydrogen/oxygen.)

Post corrected. Thanks Paul!

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The science team for New Horizons is considering shifting the spacecraft’s Pluto flyby away from the planet to avoid orbital debris.

9:20 am

The science team for New Horizons is considering shifting the spacecraft’s Pluto flyby away from the planet to avoid orbital debris.

“We’ve found more and more moons orbiting near Pluto — the count is now up to five,” Stern said. “And we’ve come to appreciate that those moons, as well as others not yet discovered, act as debris generators populating the Pluto system with shards from collisions between those moons and small Kuiper Belt objects.”

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Just two months after the failure of its second stage during launch, Russia’s Proton rocket successfully put a communications satellite into orbit yesterday.

9:01 am

The competition heats up: Just two months after the failure of its second stage during launch, Russia’s Proton rocket successfully put a communications satellite into orbit yesterday.

This quote, from this Space News article, also implies that there is increasing competitive pressure in the launch industry, which I attribute to the success of SpaceX’s Falcon 9:

Perhaps the most striking element of the launch is that Washington- and Luxembourg-based Intelsat agreed to proceed with it so soon after the August failure of the Proton Breeze-M upper stage. It has been common practice following previous Proton failures that a Russian government mission would be the customer on the return to flight. In this case, Intelsat and its insurance underwriters were sufficiently persuaded that Reston, Va.-based ILS and Proton prime contractor Khrunichev Space Center of Moscow had come to grips with the issue to agree to be the customer for the first flight after the failure.

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Scientists have found the source of the water on the Moon and Mercury: the solar wind.

8:48 am

Scientists have found the source of the water on the Moon and Mercury: the solar wind. Key paragraph:

“We found that the ‘water’ component, the hydroxyl, in the lunar regolith is mostly from solar wind implantation of protons, which locally combined with oxygen to form hydroxyls that moved into the interior of glasses by impact melting,” said Zhang, the James R. O’Neil Collegiate Professor of Geological Sciences. “Lunar regolith is everywhere on the lunar surface, and glasses make up about half of lunar regolith. So our work shows that the ‘water’ component, the hydroxyl, is widespread in lunar materials, although not in the form of ice or liquid water that can easily be used in a future manned lunar base.” [emphasis mine]

Though this result would explain the detection of hydrogen on the lunar surface and would also mean that this hydrogen is far less useful for future colonists than previously hoped, it doesn’t eliminate the possibility that there is ice in the permanently shadowed craters near the lunar poles that came from other as yet unknown sources.

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The new ebook edition of Genesis

12:56 pm

I am thrilled to announce that the new ebook edition of my first book, Genesis: the Story of Apollo 8, is now officially available for sale for only $5.99 from Mountain Lake Press. The direct link to Mountain Lake Press’s sales page is here and on the right. Within two weeks the book will also be available at all retailers, but if you buy it direct from Mountain Lake Press, I will make a little extra money, which would be very much appreciated.

In creating this ebook edition I made sure that all the graphics from the original but out-of-print hardback were included. Valerie Anders, the wife of astronaut Bill Anders, added her own thoughts in a new foreword. I also added a new introduction discussing how the history of space exploration has evolved since the book’s initial publication in 1998. As I noted,
» Read more

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The Orbcomm communications satellite put in a wrong orbit in the Falcon 9 launch has fallen to Earth.

10:15 pm

The Orbcomm communications satellite that was put in the wrong orbit by the Falcon 9 rocket Sunday has fallen to Earth.

According to the company insurance will cover most of the loss. They also said that “had Orbcomm been the primary payload on this mission, as planned for the upcoming launches, we believe the OG2 prototype would have reached the desired orbit.” This appears to be a strong endorsement of the Falcon 9 rocket from the company, which has a contract with SpaceX to launch 17 more satellites on two Falcon 9 launches, scheduled for 2013 and 2014.

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An update on the Falcon 9 engine problems.

4:09 pm

An update on the Falcon 9 engine problems.

Based on SpaceX’s press release, the rocket functioned as designed to overcome the engine failure. Nonetheless, it behooves them to find out why that engine shut down prematurely.

More worrisome for the company is the failure the Falcon 9 rocket to place in its proper orbit a secondary payload, an Orbcomm communications satellite. The satellite ended up in too low an orbit, probably because of the engine failure during launch. Orbcomm has a contract with SpaceX to launch a whole series of these satellites. This failure now, right at the get-go, won’t do them much good in terms of public relations.

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One engine of the Falcon 9 failed during launch.

8:43 am

Confirmed: One engine of the Falcon 9 exploded during launch.

Video at the link. The other 8 engines picked up the slack — as designed — and got Dragon into orbit.

This spectacular engine failure will of course have to be reviewed. However, if I were a commercial satellite company looking for a rocket to get my satellites into orbit, this failure would be recommendation, not a deterrent. The Falcon 9 demonstrated that even if one engine fails (and this one did by blowing up!), the rocket can survive the failure and make it to orbit. If that isn’t clear proof that this is a well designed and well built rocket, nothing is.

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NASA and the Russians have agreed to fly a two-person year long mission on ISS beginning in the spring of 2015.

6:58 pm

It’s now official: NASA and the Russians have agreed to fly a two-person year long mission on ISS beginning in the spring of 2015.

NASA has denied that this agreement has any connection with the Sarah Brightman/Russian deal, but I still wonder. Either way, it is very good news. Not only will they finally be using ISS appropriately, a mission like this will generate some real excitement for space exploration that the repeated boring six month expeditions to ISS have failed to do. Even better would be to schedule a two year mission, simulating a journey to and from Mars.

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In order to get a seat on a Soyuz capsule Sarah Brightman outbid NASA, bumping its astronaut out and thus forcing the U.S. agency to finally agree to a year long mission.

7:12 pm

Irony of ironies: In order to buy her seat on a Soyuz capsule Sarah Brightman outbid NASA, bumping its astronaut out.

This was a win-win for the Russians. They get paid more by Brightman than by NASA (over $51 million), and they finally get that year long mission they’ve been campaigning for for years. Because Brightman has taken one of NASA’s seats, the U.S. agency was forced to agree to the extended mission in order to maintain a presence on the station throughout that time period. Otherwise, their astronaut would come home and be replaced by Brightman, but for only ten days.

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