Found this on Hack-A-Day today: http://hackaday.com/2014/10/27/flying-wing-project-uses-3d-printing-to-reach-new-heights/ ...Tiger
I like the design, it looks pretty cool. I read elsewhere that they will build a larger version with a turbine.
I read that they are testing 3D printing full size houses. I think they are using mud/adobe as the media. Speaking of 3D printing - HP is getting into it now with something they call "Multi Jet Technology". Check it out: http://www8.hp.com/us/en/commercial-printers/floater/3Dprinting.html