nuckolls.bob(at)aeroelect
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 Posted: Sun Aug 16, 2026 3:41 pm Post subject: Galloping alternator - Piper Warrior |
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At 08:30 AM 7/22/2026, you wrote:
| Quote: | Hi Bob et al
I have been reading Aeroelectric resources on the cause of the galloping alternator issue, and how to fix. I just want to verify that the circuit where a too-high resistance will cause an oscialltion is this one (yellow): |
CORRECT
| Quote: | | And that a differential diagnosis is that the problem goes away on temporary connection of the red wire - have I understood that correctly? |
CORRECT
Forgive my tardiness but I suspect you've
already confirmed your hypothesis independently.
This was a common problem on single aircraft
with solid state regulators on alternators.
Not so much with the legacy electro-mechanical
regulators but STILL POSSIBLE.
The APPROVED fix would be to renew all hardware
and wiring between the bus and the B terminal
of the regulator. The FOREVER fix would be to
replace as cited but use heavier lead wire.
14AWG would be great. No need to upsize the
breaker . . . the existing breaker will more
than adequately protect a larger wire.
Let us know what you find out . . .
Bob . . .
////
(o o)
===========o00o=(_)=o00o=========
< Go ahead, make my day . . . >
< show me where I'm wrong. >
=================================
In the interest of creative evolution
for the-best-we-know-how-to-do based
on physics and repeatable experiment.
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