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Date: Fri, 15 Jun 2007 10:35:50 -0700
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
From: Ken Welter <rotarycoot.ken@gmail.com>
Subject: [FlyRotary] Re: I've been prayed out of Rotary Purgatory
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>Lehanover@aol.com wrote:
>>In a message dated 6/15/2007 9:35:51 A.M. Eastern Daylight Time, 
>>echristley@nc.rr.com writes:
>>
>>     One EDIS would be set to control the leading
>>     plugs with a wasted spark, and the second would control the
>>     trailing.     It promises to be a very robust setup with 
>>multiple redundancies.
>>
>>Don't forget that the trailing sparks must be distributed. Never 
>>fired at the same time.
>>  Because there will be an apex seal between the two spark plugs, 
>>and destroy the engine.
>>  Leading plugs in the lost spark situation, is no problem.
>>  Lynn E. Hanover
>>
>
>That's why two EDIS ignitions are needed...running from separate vr 
>sensors.  The trailings sensor can even be offset by 5 or 6 degrees 
>to give the trailing spark delay.
>
    Do you know that you can dry fire the leading plugs but you cannot 
dry fire the trailing they must be only fired on the compression 
stroke.
  Ken Welter