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Charley, The voltage holds steady. But yes some of the other readings gyrate around slowly and then recover with the amp reading after 30 seconds. I only have one alternator, battery etc – very simple system and plane! From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Charley Brown
Sent: 10-25-11-Tue 21:01
To: lml@lancaironline.net
Subject: [LML] Re: Problem with Fluctuating Amperage The voltage almost HAS to be fluctuating wildly if the ammeter reading is anywhere near right -- which raises the question, why is it only the fuel readings that are affected? With those amps, the whole system should be flashing on/off... If this is the amperage for the primary alternator... is there a backup alternator involved? Oscillations between primary and backup can be significant if they both regulate to a similar voltage. Legacy 28V dual alt single batt g900x On Oct 25, 2011, at 1:01 PM, Dennis Johnson wrote:
What is the voltage reading during this time? Does the Grand Rapids EFIS Sport record data that you can download and study after a flight? ----- Original Message ----- Sent: Tuesday, October 25, 2011 4:50 AM Subject: [LML] Problem with Fluctuating Amperage Any ideas about what would cause my amperage to start fluctuating wildly about 5 minutes into a flight?
It starts out fine after takeoff at 15 amps and then goes to -50 amps for 30 seconds, and then gyrates between 5 amps and -50 amps for a minute and then goes back to normal. It repeats this sequence every 5 minutes.
My fuel gages also go down to zero during this episode and then back to normal.
Is my B&C LR3C Linear Regulator going bad?
(I'm getting these readings from my Grand Rapids EIS engine monitor. It's hooked up to a Grand Rapids EFIS Sport.)
Thanks for the help!
David T.
Legacy RG
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