By Tito the Flying Asian
The Tesla turbine is a bladeless centripital flow turbine obviously constructed by Nikola Tesla in 1913. Tesla wanted this to be implemented in geothermal technologies.
This turbine works by a gas being applied to the edge of metal disks. This then rotates the disks by means of viscosity and adhesion. The turbine is able to start itself from steam alone. The tesla turbine was relativly efficient generating above 60% efficientcy and up to 95%. Tesla did come across a few problems due to his lack of knowledge in the fields of metalurgy and how fluids move.