http://www.newscientist.com/blogs/nstv/2012/04/flying-object-propels-itself-by-flipping-inside-out.html (http://www.newscientist.com/blogs/nstv/2012/04/flying-object-propels-itself-by-flipping-inside-out.html)
Fascinating. Many of the commenters, below the article, note the beauty of the design; I have to agree. There is something elegantly simple about its design that mystifies me. It makes me think that it could be attached to something else (dirigible), or suspend something in the middle of it, to make it a functional design.
It certainly is a neat concept, and I hope to see it used in some sort of practical sense sometime in the future.
I don't care if it is practical, I just want one. ;D