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Continue to Chat1st flight of an ultra light helicopter with combined turbine and 3 blades rotor https://aviationnews.eu/news/2012/06/1st-flight-of-an-ultra-light-helicopter-with-combined-turbine-and-3-blades-rotor/
1st flight of an ultra light helicopter with combined turbine and 3 blades rotor https://aviationnews.eu/news/2012/06/1st-flight-of-an-ultra-light-helicopter-with-combined-turbine-and-3-blades-rotor/