| 摘要 |
PURPOSE: A chemical spraying unmanned helicopter is provided to install a tail rotor in the end part of an upward tail part, thereby preventing the slant of the unmanned helicopter by dynamical causes. CONSTITUTION: A chemical spraying unmanned helicopter includes a body(10), an engine(12), a vertical rotation shaft(16), a main rotor(18), a driven gear(20), a driven shaft(22), a main pulley(24), a horizontal tail part(26), a connection device(30), an upward tail part(28), a tail rotor pulley(42), and a tail rotor(45). The driven gear rotates by receiving power from a power transmission device(14). The driven shaft rotates by being fixed in the driven gear. The main pulley rotates by being installed in the upper part of the driven shaft. The horizontal tail part is installed to the rear side of the body from the main pulley. A first pulley and second pulley are installed in a bent part of the connection device. The upward tail part is extended in an upward direction by being fixed in the rear end part of the bent connection device. The tail rotor pulley is fixed in the rear end part of the upward tail part.
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