Unmanned Helicopter

An unmanned helicopter, comprising a head, a fuselage and a tail, wherein the fuselage comprises a first side, a second side, a third side and a fourth side, a paddle for the flight of the unmanned helicopter is arranged on the first side, an undercarriage for the landing of the unmanned helicopter is arranged on the fourth side, the second side and the third side are symmetrically distributed on both sides of the first side and/or the fourth side, so that the fuselage is formed by enclosure of the first side, the second side, the third side and the fourth side;

• wherein the unmanned helicopter further comprises:
• an air inlet system, which is fixed on the second side, and the air inlet direction of which faces to the direction of the head;
• an exhaust system, which is fixed on the third side, and the exhaust direction of which faces to the direction of the tail to discharge the tail gas generated by the combustion in the unmanned helicopter through the exhaust system;
• a cooling system, which is fixed on the first side, so that external cold air is sucked into the fuselage via the cooling system to cool the fuselage;
• and
• a dynamic balance system, which is rotationally fixed on the tail, and a rotation plane of which is vertical to the rotation panel of the paddle, so as to control the dynamic balance degree of the unmanned helicopter in a flight process through the rotation of the dynamic balance system;
• wherein the air inlet direction of the air inlet system is parallel to the exhaust direction of the exhaust system, and as the air inlet direction of the air inlet system faces to the direction of the head, the air inlet direction corresponds to the flow direction of airflow that flows reversely relative to the unmanned helicopter, so that the airflow smoothly flows into the air inlet system under the action of its own flow velocity relative to the unmanned helicopter.