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rotor tach question

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  • rotor tach question

    What is recommended air gap between the sensor and the ring gear teeth. The spec sheet I have for the sensor implies .005 in. This seems awfully close to me but it may be necessary for it to work. Can anyone help me with what works for you on your machine.

  • #2
    It needs to be as close as possible without touching. You should feel the magnetic field bounce as a tooth goes by.
    Bobby Munroe
    Private Pilot (SEL)
    PRA Chapter 62 #42748
    EAA #1160523

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    • #3
      OK, thanks, John R.

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