The Bluebird Aero Systems ThunderB-VTOL is a revolutionary vertical takeoff and landing aircraft that uses a ducted propeller to fly. The VTOL's unique design sets it apart from traditional helicopters, which are more difficult to control due to their spinning rotors. The ThunderB-VTOL's propeller is located in a duct at the rear of the fuselage, and does not pose a risk of contact with the ground during takeoffs and landings. The ThunderB-VTOL has a maximum range of 150 km, can stay in the air for 720 minutes before needing refueling.