david mccandless wrote:

 > Hi Paul and All,

 I plan to use the ACS Ignition Switch as shown in the Aircraft
Spruce catalogue; the standard 'Off L R Both Start, model. Has
anyone a better idea or used a different arrangement. Comments,
please, Dave McC

   I have two batteries as I think most out there do so I have double
throw switches for leading and trailing ignition and both fuel pumps
to switch from the main to the backup battery but this could also be
accomplished with a double throw master switch.

   The advantage of independent double throw switches is that I run
the leading ignition and one fuel pump on the main battery and the
trailing ignition and the other pump on the backup battery on takeoff
and then switch them all back to the main after I have safe altitude.

  Ken

David, it will depend on what you are using to run the ignition. It
sounds like Ken may be switching power supplied to two separate ignition
units, this would not be possible with the ACS switch, which grounds out
the R and L terminals when in the Off, R or L position in order to
disable magnetos.
I am using Tracy's EC2 with one double pole momentary center off switch
to disable leading / trailing ingnition for runup checks, and a separate
pushbutton for the starter. I think the ACS switch will work with
Tracy's unit OK, more info needed if you are using something else.

Chuck Dunlap

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