----- Original Message -----
Sent: Monday, January 24, 2005 2:25
PM
Subject: [FlyRotary] Re: Battery load
test
Everyone should already have a quick disconnect already built into their
electrical system. It is called the Master solenoid or contactor.
I run my starter cable through the Master solenoid so that when the
Master is off the Starter cable is not Hot. This is not that uncommon as Piper
does the same thing. I looked at the wiring schematic for my Piper Warrior
when I was wiring my homebuilt and discovered this trick. If the starter
sticks simply turn off the Master switch. Problem solved.
Jim
Paul <sqpilot@bellsouth.net> wrote:
Hi, Mark....unfortunately, I am presently
working as a heavy truck mechanic (18 wheelers), and I have been on many a
road call where the starter was stuck engaged.On a few units, once I
disconnected the batteries (4 of them) the starter would be OK to use
again. On two of the trucks, I could not get to them in time, and it
burned the wiring harness so badly that the whole harness had to be
replaced. The other tractor burned to the ground. Melted all the
tires, all windows gone, all fiberglass hood and fender parts melted....not
a pretty picture.
I have a quick
disconnect on the negative terminal on my motor home so that if the starter
solenoid should hang up, I can simply open the blade-style switch and
disconnect the battery. Hopefully I will never need it, but it's nice to
know it's there just in case. I have been looking at the various
battery switches/quick disconnects at West Marine, and have been considering
one for my aircraft. Heck, it's convenient jus to be able to
quick-disconnect the battery when working on the panel, fuel pumps, spark
plugs/wires, etc. Just a thought. Paul Conner
----- Original Message -----
Sent: Monday, January 24, 2005 8:47
AM
Subject: [FlyRotary] Re: Battery load
test
Wendell,
There is some
benefit to using a starter relay in addition to the starter
solenoid. The argument is that this arrangement will keep the fat
wire going to the starter from being always hot. Also, I’ve heard
stories of starter solenoids sticking with no way to stop the starter
until it runs the battery dead. Not sure I buy that argument
though. I tied my alternator B+ wire to the battery terminal on the
solenoid (mounted on firewall) rather than running it all the way back to
the battery (in the tail). I also picked up on the same B+ terminal
to provide power to the Main Power Buss. This saved about 25’ of
heavy gauge wire, offsetting the weight of the
solenoid.
Mark
S.
Refering to the battery going
directly to the starter, most all starters with built in solinoids
are so wired. I remember having a starter to hang on occasion and
drain the battery or ruin the starter. Is it practicle to use a
relay in conjunction with the starter/solenoid set
up?
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