scramjet

05.12.08

Semper Fly: Marines in Space

A proposed suborbital space transport will put boots on the ground anywhere in the world in two hours or less. But can it overcome huge technological-and political-hurdles?
By David Axe Posted 12.18.2006 at 3:00 am 0 Comments

For a look at a prototypical Space Marine mission, launch the photo gallery.

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Freakish Speed, by the Numbers

NASA’s X-43A scramjet hits Mach 7 and won’t stop there.
By Posted 07.26.2004 at 4:30 pm 0 Comments

5,000 MPH Approximate top speed clocked by the X-43A hypersonic scramjet aircraft on March 27


720 MPH Relative speed of sound


11 SECONDS Approximate duration of the X-43A’s powered flight


15 MILES Distance traveled


2 HOURS Estimated flight time from New York to Hong Kong traveling 5,000 mph


1 MILLISECOND Time the X-43A engine takes to generate thrust


2,200 MPH Previous record for a jet aircraft


1,350 MPH Average cruising speed of Concorde jet













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