On Thu, Jul 23, 2015 at 8:14 PM, Richard Aiken <raikenclw@gmail.com> wrote:

This article says hydrogen fuel provides thrust after passage through an exchanger heated by the externally-generated microwaves. The result craft would simply "glide back to the launch pad, refuel, and will be ready for its next flight."

And googling further . . .

Wikipedia says that such a microwave powered exchanger was proposed as a concept in 2001.

So maybe the "breakthrough" is that they've actually made it work? At least in the lab?

Richard Aiken

"Never insult anyone by accident." Robert A. Heinlein

"A word to the wise ain't necessary -- it's the stupid ones that need the advice." - Bill Cosby

"We know a little about a lot of things; just enough to make us dangerous." Dean Winchester