Mailing List flyrotary@lancaironline.net Message #56655
From: Ernest Christley <echristley@nc.rr.com>
Subject: Re: [FlyRotary] Re: The good news and the bad news......
Date: Tue, 13 Sep 2011 17:08:57 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Bobby J. Hughes wrote:

Chad,

 

I think the issue would be the physical location of the second CAS. It would need some type of programmable position offset to work correctly.   Bobby

 

I have an EDIS-4 module 180* out of phase from the primary module, running in limp-home mode.

Actually, it is more like 175* out of phase.  Ford's original intent was that without an input, the module (just a small, simple computer) will keep firing the coils at 10*BTDC to get you home.  I shifted the CAS another 15* and had it control the trailing plugs, so that the spark hits at 25* BTDC, just after the leading plugs.  If anything happens anywhere to take out the leading plugs, I will get degraded (but operational) performance with just the trailing plugs.

All that is to say that the positional offset can be in the mounting.
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