Tag: spaceflight

The flight of gifted engineers from NASA

5:43 pm

Rather than work in NASA, the best young engineers today are increasingly heading to get jobs at private companies like SpaceX and XCOR.

It is a long article, worth reading in its entirety, but this quote will give the essence:

As a NASA engineering co-op student at Johnson Space Center, Hoffman trained in various divisions of the federal space agency to sign on eventually as a civil servant. She graduated from college this year after receiving a generous offer from NASA, doubly prestigious considering the substantial reductions in force hitting Johnson Space Center in recent months. She did have every intention of joining that force — had actually accepted the offer, in fact — when she received an invitation to visit a friend at his new job with rising commercial launch company SpaceX.

Hoffman took him up on the offer, flying out to Los Angeles in the spring for a private tour. Driving up to the SpaceX headquarters, she was struck by how unassuming it was, how small compared to NASA, how plain on the outside and rather like a warehouse.

As she walked through the complex, she was also surprised to find open work areas where NASA would have had endless hallways, offices and desks. Hoffman described SpaceX as resembling a giant workshop, a hive of activity in which employees stood working on nitty-gritty mechanical and electrical engineering. Everything in the shop was bound for space or was related to space. No one sat around talking to friends in the morning, “another level from what you see at NASA,” she said. “They’re very purpose-driven. It looked like every project was getting the attention it deserved.”

Seeing SpaceX in production forced Hoffman to acknowledge NASA might not be the best fit for her. The tour reminded her of the many mentors who had gone into the commercial sector of the space industry in search of better pay and more say in the direction their employers take. She thought back to the attrition she saw firsthand at Johnson Space Center and how understaffed divisions struggled to maintain operations.

At NASA young engineers find that they spend a lot of time with bureaucracy, the pace is slow, their projects often get canceled or delayed, and the creative job satisfaction is poor. At private companies like SpaceX, things are getting built now. With that choice, no wonder the decision to go private is increasingly easy.

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It ain’t gravity holding this asteroid together

1:14 pm

Astronomers have discovered that near Earth asteroid 1950DA is spinning so fast that gravity can’t hold it together. Instead, it is kept whole by cohesive forces called van der Waals forces, predicted but never detected before on an asteroid.

This is the coolest factoid from the article, however:

“We found that 1950 DA is rotating faster than the breakup limit for its density,” said Rozitis. “So if just gravity were holding this rubble pile together, as is generally assumed, it would fly apart. Therefore, interparticle cohesive forces must be holding it together.”

In fact, the rotation is so fast that at its equator, 1950 DA effectively experiences negative gravity. If an astronaut were to attempt to stand on this surface, he or she would fly off into space unless he or she were somehow anchored.

The important take away from this discovery is that it will be very easy to break this kind of asteroid up, turning a large and big threat into a collection of small but harmless rocks.

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Another former SpaceX employee sues

9:09 am

SpaceX has been hit by its second lawsuit in a week from a former employee.

The lawsuit, filed in Los Angeles Superior Court, alleges that SpaceX supervisors impose schedules on their employees that make it impossible for them to take statutorily required rest periods every four hours or first or second meal breaks as required by California law.

I consider this suit a bigger threat to the company than the first. The first suit merely claimed that the company didn’t give its fired employees the 60 day warning as required by law. If they win, they will get some payments, but the company will be able to continue as before.

This second suit, if successfully, could force the company to change its aggressive culture, where employees are expected to work very hard, sometimes 60-80 hour weeks, to make things happen quickly. While those work hours might seem abusive to some, to most of the people working there it is what they want to do. A successful lawsuit here could force the company to literally stop them from working. The conditions then might be more relaxed, but the ability to make progress will be stymied, and the costs for making that progress will go up considerably.

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ULA CEO steps down

4:24 pm

Faced with stiff competition from SpaceX, United Launch Alliance (ULA) announced today a change in leadership.

United Launch Alliance has named a new president and chief executive to replace Michael Gass, who led the Atlas and Delta rocket company since its inception in 2006. Gass will be replaced effective immediately as president and CEO by Tory Bruno, an executive at Lockheed Martin Corp., which formed ULA in December 2006 in a 50-50 joint venture with Boeing Co., ULA said in a statement Tuesday. Gass is retiring at the end of the year, according to ULA.

Despite Gass’s planned retirement, the abrupt nature of his departure has everything to do with the competition from SpaceX, something that every single article about this change at ULA noted.

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NASA admits that it is struggling to meet the 2017 launch date for SLS

11:13 pm

Delays in the construction of Orion’s European-built service module as well as cracks in the spacecraft’s heat shield are threatening the planned 2017 launch date for Orion’s first test flight, unmanned, beyond Earth orbit.

Note that this program, costing anywhere from $10 to $20 billion, is only building a handful of capsules for flying three or four test flights. Beyond that, there is no money.

I have predicted this before, and I will predict it again: SLS will never take any humans anywhere. The cost is too high, the bureaucracy too complex, and the schedule is too slow. It will vanish when the new private companies begin flying humans into space in the next three years.

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Another Rosetta closeup of 67P/C-G

4:15 pm

67P on August 8

The above image is not the most recent daily image from Rosetta, but it is the most interesting of the last three.

It shows the side of the comet nucleus that has not been featured in most images, as the topographical differences between its two sections is not as distinctly highlighted. What is highlighted is the neck that connects the two sections, lighter colored and thus likely made up of less dusty ice.

Also of interest here is the circular features on the larger bottom section. These certainly resemble craters, and are likely remnants of early impacts that are now been corroded away as the nucleus’s ice particles evaporate off the surface. The scientific question here is this: Why are crater features more evident on this side and section of the comet nucleus than on other areas of its surface?

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Test results from NASA saucer Mars landing test

8:09 pm

NASA has released video and test results from the first test flight of its Low-Density Supersonic Decelerator (LDSD), referred by many press outlets as a “flying saucer” because of its shape.

The purpose of the test was to see if the saucer and its parachute would work to slow a vessel down sufficiently in the Martian atmosphere. The parachute tore and failed. The video describes the flight and the failure and how the data from this failure can now be used to modify the parachute for the next two test flights.

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The Dream Chaser test vehicle to fly again

10:08 am

The competition heats up: Sierra Nevada has announced that its Dream Chaser engineering test vehicle has been refurbished and will complete a number of manned and unmanned flight tests in the fall, with their schedule on track for a November 2016 orbital test flight.

“We will do between two and five additional flights. A couple will be crewed. As a result of the vehicle being upgraded, we will be flying our orbital flight software, which will give us about a year’s worth of advancement on the vehicle.” Flights are expected to last over a six- to nine-month period, he adds.

Sierra Nevada has also continued to expand its partnerships, both in the aerospace industry as well as with other countries. The first action is likely part of a lobbying effort to help convince NASA to choose it when it down selects its commercial manned program from three manned spacecraft to two later this year. The second action indicates that even if Sierra Nevada is not chosen by NASA, they plan to proceed to construction anyway to serve other customers.

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Orion first test flight scheduled

10:00 am

NASA has set December 4 for the first test flight of Orion.

In related news, the Navy has successfully completed a splashdown recovery test of Orion.

I haven’t labeled these stories “The competition heats up” because I have serous doubts Orion or SLS will survive the next Presidential election, even if this test flight on a Delta 4 Heavy rocket is a complete success. And if you want to know why, just read the first article above. It lists the long troubled ten-year long history of this capsule, with the following punchline describing the schedule for further launches with the actual SLS rocket:

While the first SLS/Orion mission, known as EM-1, is still officially manifested for December 15, 2017 – internally that date has all-but been ruled out. Internal schedules shows EM-1 launch date as September 30, 2018, followed by the Ascent Abort (AA-2) test – required for crew launches – on December 15, 2019, followed by EM-2 on December 31, 2020.

I find also find it interesting that in describing the many problems Orion has had in development, the article fails to mention the cracks that appeared in the capsule that required a major structural fix. Nor does the article mention the ungodly cost of this program, which easily exceeds $10 billion and is at least four times what NASA is spending for its entire program to get three different privately built spaceships built in the commercial program.

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