page_title: Cornu helicopter
section_title: Specifications
hierarchical_section_title: Cornu helicopter / Specifications
caption_attribution_description: Deutsch: Nachbau des weltersten Hubschraubers Cornu Nr. 2 vor dem Hubschraubermuseum Bückeburg
context_page_description: The Cornu helicopter was an experimental helicopter built in France, and is widely credited with the first free flight of a rotary-wing aircraft when it took to the air on 13 November 1907. Built by bicycle-maker Paul Cornu, it was an open-framework structure built around a curved steel tube that carried a rotor at either end, and the engine and pilot in the middle. Power was transmitted to the rotors by a drive belt that linked both rotors and spun them in opposite directions. Control was to be provided by cables that could alter the pitch of the rotor blades, and by steerable vanes at either end of the machine intended to direct the downwash of the rotors.
  The Cornu helicopter is reported to have made a number of short hops, rising perhaps 1.5 or 2 metres into the air and staying aloft for something less than one minute. This was long enough for Cornu to learn that the control systems he had designed were ineffective, and he abandoned the machine soon thereafter.
  Modern engineering analyses have demonstrated that the Cornu helicopter could not have been capable of sustained flight.
context_section_description: General characteristics
  Crew: One pilot
  Gross weight: 260 kg (573 lb)
  Powerplant: 1 × Antoinette , 18 kW (24 hp)
  Main rotor diameter: 2× 6.00 m (19 ft 8 in)
  Main rotor area: 56.5 m² (608 sq ft)
  Performance
  Cruise speed: 0 km/h (0 mph, 0 kn)
  Endurance: 0 hours 0.5 minutes
  Service ceiling: 2.0 m (7.0 ft)
caption: Replica - unable to fly - of the Cornu No. II in front of the Hubschraubermuseum Bückeburg
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