This is a very impressive scale-model jet engine powered by an electric motor. But it's definitely not a "fully functional Boeing-787 jet engine", as the title misleadingly implies. A fully functional Boeing-787 jet engine could power a Boeing-787, and could not be printed out of plastic (since it would burn up as soon as you ignited the jet fuel).
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[ 2.9 ms ] story [ 12.9 ms ] threadhttp://www.visualnews.com/2015/08/30/mit-invents-breakthroug...
If we can't already laser sinter an entire jet engine, we're getting closer very fast.