# What is keeping additively manufactured electric motors from getting to 50 percent efficiency? [[Materials and Processes for New Propulsion Systems with Reduced Environmental Impact]] <!-- #questions #case-study --> [Web URL for this note](http://notes.benjaminreinhardt.com/What+is+keeping+additively+manufactured+electric+motors+from+getting+to+50+percent+efficiency) [Comment on this note](http://via.hypothes.is/http://notes.benjaminreinhardt.com/What+is+keeping+additively+manufactured+electric+motors+from+getting+to+50+percent+efficiency) <!-- {BearID:BB66379F-6C64-4750-94AA-D7AEF805C69A-19569-0003CC7A55026B06} -->