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After four tries the Air Force X-51A Waverider test craft finally succeeded in achieving sustained, scramjet-powered, air-breathing hypersonic flight above Mach 5 in its final test flight on May 1.

After four tries the Air Force X-51A Waverider test craft finally succeeded in achieving sustained, scramjet-powered, air-breathing hypersonic flight above Mach 5 in its final test flight on May 1.

Genesis cover

On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.

 
The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.


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"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News

4 comments

  • From the article, it appears the test program did what test programs are supposed to do: identify problems and fix them. The fact that there was a different failure each time suggests that the basic concept and machine are sound, as the fixes amounted to tweaks of the original design. If the Air Force achieved five minutes of sustained hypersonic flight, that’s a landmark achievement. The rest, as they say, is just engineering.

  • Kelly Starks

    Very very cool.
    ;)

  • You are absolutely correct. I didn’t meant to suggest that the previous failures should somehow reflect badly on the engineering. These are test flights, so failures are simply part of the test.

  • Chris Kirkendall

    I assume this is mostly under development as an unmanned weapons system of some sort, but hasn’t there been talk of scramjets being used for human flights of some type (either civilian or military) ? I seem to remember something about that…

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