Check out this @HACKADAY article. Someone else (@Steve_Johnstone1 ) is 3D printing turbomachinery! He’s also keeping a build log on @RCGroups.com and keeping a video log on YouTube. Subscribed.
http://hackaday.com/2015/01/05/3d-printing-rc-airplanes-that-fly-an-engineers-chronicle
His airframe construction technique is really interesting.
I was telling you about this guy, it was the first thing I thought when I saw the OpenSwift project. But I already knew it!