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From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [FlyRotary] Re: Spark Plug Fouling and Temperature
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
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Date: Wed, 22 Nov 2006 21:57:15 -0500
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The recent discussions about surface gap plugs and now the fouling issue 
started me to wondering.... it seems to me if a surface gap plug were 
available that, when seated fully, the end of the electrode and it's 
surrounding grounding area was around .005" or so away from extending beyond 
the surface of the rotor housing, the full spark energy would be just about in 
direct contact with the combustion chamber.  Does anyone know how deep into 
the housing the end of a typical plug is?  Seems like this would optimize 
combustion by eliminating the need for the mixture to be ignited from within 
the spark plug hole.  Just a thought.

   <marv>