It was fantastic to see a Model Helicopter like this totaly is it 5,50 meter lenght 18 Foot and it is the World Biggest Radio Controlled LAMA SA-315B Turbine Scale model Helicopter, enjoy it. 2022 in Switzerland record by  Pilot and Builder Robert Illmaier from Austria Model Data: Scale: 1:2,6 Full Length 5,50 meter Rotor diameter: 4,50 meter Max. Fuel: 17 liter Kerosene for 1x flight need around 1,5 liter Weight: 84 kg Turbine is a Jakadofsky Pro X