But I've NEVER had the engine running without the battery and alternator
connected, unless the possibility of aging earth connections is counted
as a partial contribution. The regulator hasn't failed yet either, but
it's on its way!
For the record, the load demand is normally well below 10amps, maybe
more during charging after a start, which actually is noticeable during
temperature monitoring; the temperature drops back slightly after about
5 to 10 minutes.
Duncan McF.
----- Original Message -----
From: Bryan Allsop
To: europa-list@matronics.com
Sent: Wednesday, August 06, 2008 7:02 PM
Subject: RE: Europa-List: Ducatti Rectifier/Regulator
The e-mail from Jos makes the following comment:
": There is text on the regulator: Do not take the battery off line
with a running engine. If you look at the Rotax manual, that is exactly
what the main switch or contactor does."
Whilst replacing my Ducati I noticed the following instruction
discreetly cast between the cooling fins:-
"WITH THE MOTOR RUNNING NEVER DETACH BATTERY CABLES".
Until that time I was not aware of it. If I had been, it would not
have appeared to be a problem. It is a problem though for aircraft like
mine, where the ignition switches are independent of the master switch.
Retrospectively, I can recall that I have occasionally switched all
power before stopping the engine, thus isolating the battery with the
engine running.
The current general advice seems to be that overheating is not a major
problem. If that is the case, it seems more likely that Ducati failures
in aircraft can be put down to isolating the battery with the engine
running.
From now on, my shut down procedure will be "engine before master
switch".
Bryan
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