section_path: Propulsion/Powered aircraft/Rotorcraft
section_name: Rotorcraft
paragraph_text: Rotorcraft
  
  Some rotorcraft, such as helicopters, have a powered rotary wing or rotor, where the rotor disc can be angled slightly forward so that a proportion of its lift is directed forwards. The rotor may, like a propeller, be powered by a variety of methods such as a piston engine or turbine. Experiments have also used jet nozzles at the rotor blade tips.