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Thread: Twitching Ammeter

  1. 12-16-2018, 02:07 PM #1
    Chris Iriarte
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    Default Twitching Ammeter

    Thought I’d ask if anyone has experienced/solved this before I tear into it ...

    My Tripe has the Moody alternator conversion (35 amp) and a solid-state voltage regulator. Ammeter is steady on the charge side at idle but at cruise rpms it takes on a steady wiggle. I suspect it’s been like this for some time but now that I’ve installed the LED lights in the cabin I can really see the lights fluctuating. Haven’t put a meter on it yet ...

    Chris

    Addendum: I haven’t flight tested it but I think the alternator and the voltage regulator had different grounds. I joined them up ... will see next flight!
    Last edited by Chris Iriarte; 12-16-2018 at 04:45 PM. Reason: update
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  2. 12-17-2018, 07:25 AM #2
    Steve Pierce
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    Default Re: Twitching Ammeter

    I would hook a meter to the buss and when flying start turning loads off and see if it is a load issue or a charging issue. Be interested to see what you find.
    Steve Pierce

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  3. 12-17-2018, 09:25 AM #3
    Gilbert Pierce
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    Default Re: Twitching Ammeter

    Whelen type strobe lights will do this if have a really sensitive amp meter.
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  4. 12-17-2018, 01:52 PM #4
    flying bee
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    Default Re: Twitching Ammeter

    I upgraded to a Plane Power solid state regulator during my overhaul last winter and my Amp Meter started acting erratic. It ended up being the alternator field breaker switch.
    Craig
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  5. 12-18-2018, 09:54 PM #5
    Cajunwings
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    Default Re: Twitching Ammeter

    Used to see oscillating/pulsating ammeters in Mooneys. They used push on blade connectors at the master switch and often cleaning the connections would cure this.

    Don Broussard
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