CO-AXIAL REVERSING TYPE UNMANNED HELICOPTER

摘要

PROBLEM TO BE SOLVED: To configure a yaw-axis control mechanism of a co-axial reversing type unmanned helicopter so that a pitch angle of the upper rotor blade can be correctly controlled with a simple construction without the need for a precise adjustment.;SOLUTION: A rudder control rod 13c is inserted in a main mast 13 of a co-axial reversing type helicopter, the lower end part of the rudder control rod 13c being connected to an output lever of a rudder servo RS, a mixing rod head 26 being fixed to the upper end part of the rudder control rod 13c. By attaching a linkage mechanism connected to an upper swash plate 17 to the side surface of the mixing rod head, a vertical change in position of the mixing rod head that goes up and down with the rudder control rod is converted into a change in position that tilts and moves an upper blade holder 15b around a support shaft via the linking mechanism. Thus a pitch angle of the upper rotor blade 15c is changed.;COPYRIGHT: (C)2014,JPO&INPIT