By Michelle Starr New Zealand-based Rocket Lab has built a rocket engine that’s not only 3D-printed — it’s uses electric motors to drive the turbopumps.

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Source:: http://cnet.com.feedsportal.com/c/34938/f/645093/s/4570c43e/sc/28/l/0L0Scnet0N0Cnews0Cthe0Eworlds0Efirst0E3d0Eprinted0Ebattery0Epowered0Erocket0Eengine0Edestined0Efor0Espace0C0Tftag0FCAD590Aa51e/story01.htm