Jeff,

Do you have a fuse in the B lead?

Bobby

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Thursday, August 02, 2018 9:41 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Alternator Damaged - Internal Short

Last Thursday I decided to try my cooling on a hot day 32C (90F);
orbiting the airport, the cooling wasn't too bad but while waiting for
the temps to stabilize I smelled smoke so landed immediately.  Saw a bit
of smoke exiting the oil cooler plenum so thought I was baking some
fiberglass.
On the weekend I did a more thorough inspection and found the battery
mains cable burned where attached to my alternator cut-out relay and the
relay fried to the point that the input terminal was loose.  The
connections stayed in place but open-circuited the relay - so the engine
never skipped a beat and I was unaware there was an electrical problem
at the time. Only reporting this now as it took me a while to get the
alternator tested.
Jeff