Patent ID: 8177600

Claim:
A single rotor model helicopter, comprising a spindle, a rotor clamp disposed on the spindle, a pair of rotor blades disposed on the rotor clamp, and a pair of hybrid control rocker arms, and further comprising an operating system and a balancing system, wherein the operating system comprises: a first servo, having a first output shaft adapted to output a longitudinal operation torque; a second servo, having a second output shaft adapted to output a transversal operation torque; and a swash plate combination, connected to the first servo and the second servo through connecting rods, and adapted to convert the longitudinal operation torque and the transversal operation torque to a cyclic torque; the balancing system comprises: a balancing rod connected to the spindle, and a pair of balancing hammers disposed on both ends of the balancing rod; wherein the pair of hybrid control rocker arms are respectively disposed on both sides of the rotor clamp, and rotatably connected to a pitch control rocker arm disposed on both sides of the rotor clamp through axial holes respectively; each hybrid control rocker arm has two control points, wherein a first pair of control points diagonally opposite each other in the pair of hybrid control rocker arms are controlled by the cyclic torque transmitted from the swash plate combination, a second pair of control points diagonally opposite each other are controlled by the balancing system, and the second pair of control points controlled by the balancing system and the first pair of control points controlled by the swash plate combination move relative to each other as mutual fulcrums; a mechanical longitudinal axial line of the model helicopter is at a position where there is an angle smaller than 90° between the mechanical longitudinal axial line and the longitudinal axis at an anti-rotor blade rotation direction of the longitudinal axis of the model helicopter, and a mechanical transversal axial line is at a position where there is an angle smaller than 90° between the mechanical transversal axial line and the transversal axis at an anti-rotor blade rotation direction of the transversal axis of the model helicopter; and an axial line of the balancing rod is in front of a front edge of the rotor blades, and a horizontal angle between the axial line of the balancing rod and an axial line of the rotor blades is between 25° and 65°.