Category Archives: Space
The Quality Of Metal 3-D-Printed Objects
Looks like it’s about to exceed any other fabrication technology:
“We can now control local material properties, which will change the future of how we engineer metallic components,” Dehoff said. “This new manufacturing method takes us from reactive design to proactive design. It will help us make parts that are stronger, lighter and function better for more energy-efficient transportation and energy production applications such as cars and wind turbines.”
The researchers demonstrated the method using an ARCAM electron beam melting system (EBM), in which successive layers of a metal powder are fused together by an electron beam into a three-dimensional product. By manipulating the process to precisely manage the solidification on a microscopic scale, the researchers demonstrated 3-dimensional control of the microstructure, or crystallographic texture, of a nickel-based part during formation.
Crystallographic texture plays an important role in determining a material’s physical and mechanical properties. Applications from microelectronics to high-temperature jet engine components rely on tailoring of crystallographic texture to achieve desired performance characteristics.
“We’re using well established metallurgical phenomena, but we’ve never been able to control the processes well enough to take advantage of them at this scale and at this level of detail,” said Suresh Babu, the University of Tennessee-ORNL Governor’s Chair for Advanced Manufacturing. “As a result of our work, designers can now specify location-specific crystal-structure orientations in a part.”
This will be key for human expansion into space.
The New Space Age
ISPCS
The opening ceremony is a (brief, presumably) literal space opera about a mission to Mars.
[Update]
“Searching for nothing but action verbs” on Mars. OK.
[Update after the 20-minute opera]
Pat Hynes paying tribute to the late Bill Gaubatz, who helped her get this conference started ten years ago, who died in July.
Off To Las Cruces
I’m heading to the airport to go to ISPCS. I’ll check in later.
[Later]
OK, made it here, went to reception, much food and drink was consumed and many old acquaintances refreshed. Lots of compliments on the book, but this is the choir. Off to bed, and conference tweeting/blogging on the morrow.
Safe Is Not An Option: A Review
Finally, someone at NASA is willing to take the book seriously enough to critically review it. Obviously, I will respond at some point (TL;DR version, he cherry picks and ignores much of what I have to say, but that’s to be expected, given his NASA-centric viewpoint), but it’s a bad week between taxes and ISPCS. Anyway, despite my disagreement with the review itself, I’m sincerely grateful to Mr. Fodrocci for finally acknowledging the book’s existence, rather than (as much of the industry, including IAASS, has) pretending it doesn’t exist and hoping it will just go away.
Sierra Nevada’s Bid
Although the document praises Sierra’s “strong management approach to ensure the technical work and schedule are accomplished,” it cautions that the company’s Dream Chaser had “the longest schedule for completing certification.” The letter also states that “it also has the most work to accomplish which is likely to further extend its schedule beyond 2017, and is most likely to reach certification and begin service missions later than the other ‘Offerors’.”
Discussing costs, Gerstenmaier says that “although SNC’s price is lower than Boeing’s price, its technical and management approaches and its past performance are not as high and I see considerably more schedule risk with its proposal. Both SNC and SpaceX had high past performance, and very good technical and management approaches, but SNC’s price is significantly higher than SpaceX’s price.”
Touching on why Boeing received a $4.2 billion contract, versus $2.6 billion for SpaceX, he adds “I consider Boeing’s superior proposal, with regard to both its technical and management approach and its past performance, to be worth the additional price in comparison to the SNC proposal.”
Given how subjective such evaluation processes are, it’s not an implausible story.
Five Years After Augustine
James Dean has an interview with the man himself.
This is the essay I wrote the previous summer as an input to the committee.
The Chairman Of The House Science Committee
“If Orion could provide a redundant capability as a fallback for the commercial crew partners, why is it necessary to carry two partners to ensure competition in the constrained budget environment?” Smith asked NASA Administrator Charles Bolden in an Oct. 7 letter co-signed by Rep. Steven Palazzo (R-Miss.), chairman of the House Science space subcommittee.
So as a bonus, the chairman of the space subcommittee is an idiot, too.
The country’s in the very best of hands.
XCOR’s Approach To Space
Speaking of Stewart Money, he has a nice post, comparing and contrasting Virgin, XCOR and SpaceX.