Tesla Motors: Every millimeter of Model S is designed to reduce drag. The door handles are no exception. When not in use, the handles retract into the body, streamlining airflow. When a driver approaches the vehicle with the key, the handles slide out and unlatch with a simple touch.
"Tesla Turbine Operation" - Rather than using blades and friction, the Tesla Turbine uses parallel, closely spaced disks that tap viscosity. Aerodynamic skin adhesion effect resists fluid or gas flow between plates, resulting in energy transfer to the shaft. The technology has been proven to work but is yet to break into marketplace in a cost-effective version.