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Date: Thu, 17 Feb 2011 16:17:08 -0500
From: Ernest Christley <echristley@att.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: - Day dreaming...
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Lehanover@aol.com wrote:

> *However, you can fire both plugs in either housing at the same time (no 
> split) with either a double ended coil designed for lost spark, or two 
> separate coils, one for each plug. Works fine. Raced with it for years.*
> ** 

The EDIS system is a double ended coil designed for lost spark.  Like you said, the leading and trailing will be firing 
at the same time.

When I have everything else shaken down and working, I'll add in the second 4-plug EDIS module.  This one is driven off 
of a separate VR sensor, situated 185 degrees from the first.  Leading plugs will fire off the first module.  The wire 
that had been going to the trailing plugs will be grounded.  All the energy that was being dropped across two plugs will 
now be dropped one.  Twice the power.

The trailing plugs will be delayed by 5 degrees, but will have the same power as the leading.  The trailing will be 
static (no input from the Megasquirt), and probably driven from a tiny generator mounted in the CAS's slot.  Basically, 
it will be the equivalent of a magneto.  A self contained ignition source.  Hopefully, it won't require a rebuild at 
500hr 8*)