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  • Eisemann Question

    Which mark is anti-clockwise and which mark is clockwise on the rotor? The service manual just says to install it to appropriate one.

    Thanks.
    A&P/IA
    Commercial ASEL/Instrument
    N96999 '46 Taylorcraft BC-12D
    N91467 Corvair Pietenpol
    TF#1110 prev TF # 16

    http://vansflyingservices.com

  • #2
    Re: Eisemann Question

    As you look down on the rotor it rotates clockwise on an A-65. Cylinder 1 (RH side aft) is on the lower left, the upper left contact is cylinder 3 (front right), cylinder 4 (aft left) is next and the lower right wire is cylinder 4 (front left).


    Not sure which "mark" you are talking about. Where are you in the manual and I will look it up. I think I am not understanding the question.

    Hank

    Comment


    • #3
      Re: Eisemann Question

      There is a dot on the pinion gear, and two symbols on the distributor gear. one is line with the top half of a circle, and the other has the bottom half. One is for clockwise rotating and the other anti-clockwise. Just wanted to verify that its assembled correctly.

      If that doesnt help, I think I have a spare at the house I can take a picture of.
      Thanks Hank,

      Matthew
      A&P/IA
      Commercial ASEL/Instrument
      N96999 '46 Taylorcraft BC-12D
      N91467 Corvair Pietenpol
      TF#1110 prev TF # 16

      http://vansflyingservices.com

      Comment


      • #4
        Re: Eisemann Question

        There is a small "Drill dot" on the pinion in line with the gear tooth and two marks on the rotor gear in line with the tooth spaces, with two spaces between them. The marks are to insure the points open at the right time (while the rotor is pointed at the right distributor contact).
        The pinion "dot" should be aligned with the LATER mark if the mag rotor is rotating CLOCKWISE. In other words, if you align the dot with the rotor gear mark so the pinion mark is at 12:00 and the rotor mark is at 6:00 the "extra" mark will be at 5:30.

        This is for a CONTINENTAL A-65. If the rotor is spun the other direction you use the other mark, but that also screws up the impulse coupling that needs to snap as the rotor goes past the distributor contact. Remember the input gear turns the OPPOSITE direction from the rotor! If you turn the input gear backwards the impulse will NOT snap. If you turn it the right direction you will feel the spring wind up and you better not have your finger near the ignition lead. When it snaps you can get a bad shock and will probably drop the mag!

        Hank

        You don't want to know how I know that. I didn't drop the mag, but I think it has finger dents in the case now. ;-)

        Comment


        • #5
          Re: Eisemann Question

          Makes perfect sense, thanks again Hank!
          A&P/IA
          Commercial ASEL/Instrument
          N96999 '46 Taylorcraft BC-12D
          N91467 Corvair Pietenpol
          TF#1110 prev TF # 16

          http://vansflyingservices.com

          Comment


          • #6
            Re: Eisemann Question

            I have a new old stock (still in the box) coil for AN-or a LA-4 Mag if someone needs one

            Comment


            • #7
              Re: Eisemann Question

              btw-The Eisemann Manual ignores that portion.

              However; the 70's Continental C-85---O-200 Manual covers it.

              Wonder WHY they ever used the odd symbols?

              Bendix is bad enough with L,R, CC, CCW.

              Comment

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