2008年8月6日 星期三

Cyclic Pitch Setting

Different from collective, cyclic pitch dictates the rate of cyclic throw controlling cyclic response. Different helicopter design gives different setting in this pitch.
To adjust cyclic pitch, follow the steps below :

  • straighten the blades
  • set zero degree pitch make sure the rotor would not spin by use of throttle hold switch
  • line up the blades with the tail boom
  • hold the flybar and keep it perpendicular to the main shaft
  • give the cyclic a pure full aileron input
  • measure the blade pitch and this is the aileron cyclic pitch, adjust swash mixing to achieve desirable cyclic pitch
  • rotate the rotor 90 ° so the blades are perpendicular to the tail boom
  • hold the flybar and keep it perpendicular to the main shaft
  • give the cyclic a pure full elevator input and this is the elevator cyclic pitch
  • adjust the elevator rate in swash mixing to achieve the desirable cyclic pitch

At last, rotate the rotor head slowly to check for servo binding, lower the rate if this happens

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