Hi Mark. From my experience with 60's and 70's automotive Ignition
Switches, the (ACC) essories terminal goes dead ( loses the 12 volts)
when the switch is turned to "Start" position. this prevented under
voltages from destroying radios, etc. Just my 2 cents. John Shaffer.
-----------------------------------------From: "Mark Langford"
To: krnet@list.krnet.org
Cc:
Sent: Sunday April 16 2023 9:19:33PM
Subject: Re: KRnet> Ignition switch wiring.
You only need three of the five positions. One for 12V in from the
battery, one is "Ignition ON", and the other is "START" (to the
starter solenoid). The "solenoid" is that big lump on the starter that
throws the pinion gear into the flywheel. It should be bolted to the
starter already....the cylindrical thing you actually feed the giant
electrical cable to, and the smaller terminal that receives the
"signal" to actuate the solenoid. What you may need is a relay so all
the juice for the solenoid doesn't go through the switch and lead to
pre-mature death by switching too much current. Buy a big enough relay
with a higher amperage rating than the solenoid "signal" uses to make
the starter engage...or just use a big one, like 20A or so would
likely work fine.
You can use the other terminals on the switch for whatever you want,
but I doubt you need an "ACCessory" position in an airplane, but just
because it's there, doesn't mean you have to use it.
See [1]http://www.n56ml.com/electrical/index.html [2] for details of
N56ML's wiring, including a "schematic" of sorts that will likely
answer a lot of your questions, as well as show you how to make a
"redundant" ignition and fuel system setup..
Mark Langford
"mailto:m...@n56ml.com";>m...@n56ml.com
"http://www.n56ml.com";> [3] "_blank">http://www.n56ml.com
Huntsville, AL
Links:
------
[1] http://www.n56ml.com/electrical/index.html
[2] http://www.n56ml.com/electrical/index.html
[3] http://www.n56ml.com
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