The fastest drone in the world is probably at the Dubai Air Show right now. Thanks to a jet engine, the drone can reach speeds of up to 150 mph.

http://thedronenews.com/2015/11/11/a-3d-printed-drone-just-might-be-the-fastest-uav-unmanned-aerial-vehicle-in-the-world-its-jet-engine-and-lightweight-build-enables-the-drone-to-reach-speeds-of-up-to-150-mph-the-ultrafast-ultra/

Dr. Hans Mumm