General Electric has completed a multi-year project to print a working jet engine. Engine is small enough to fit in a backpack. Engine was printed on an M270 industrial 3D printer from a lab in Cincinnati, Ohio. GE is working with additive manufacturing as a way to produce next-generation jet parts using a technique known as (DMLM) The engine was printed using high-temperature alloys not typically available to the radio-controlled engine industry. The resulting engine endured numerous tests and the turbine achieved 33,000 rpm.”]
Source: https://www.computerworld.com/article/2921583/ge-3d-prints-a-working-rc-jet-engine.html