title: Air turbine
text: # Air turbine
  
  An air turbine is a turbine driven by airflow. Various forms include:
  
  * Wind turbine, a renewable energy source
  * Gas turbine, a type of internal combustion engine
  * Ram air turbine (RAT), an emergency power system for aircraft
  * Small air turbines, used as high-speed pneumatic motors in tools such as dentist's drills
  