Mailing List flyrotary@lancaironline.net Message #36336
From: Kelly Troyer <keltro@att.net>
Subject: Re: Fuel grade for renessis
Date: Sat, 24 Mar 2007 04:28:27 +0000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Lynn,
   As usual an education about the rotary......Please clarify for me the statement
below.....I presume the "18" is timing degrees BTDC and the "5" is the degree
split between leading and trailing plug firing ? Do you run a split on your race
car ? I presume you know that Tracy's EC2 has essentially no split.......What
is your take on the use of a split for our A/C use ? 
 
--
Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold




-------------- Original message from Lehanover@aol.com: --------------

 
 
You are slowing so there is no throttle opening to speak of and the idle mixture is very lean and difficult to light at all, so the big lead and improved agitation and burning.
 
( When the throttle is opened, and manifold pressure is low, timing may be pulled back to 18 and 5 so the low RPM and good cylinder filling does not detonate the engine. )
 
Once rpm are built up, and cylinder filling and effective compression ratio has dropped, timing again advances to maintain ideal torque generation. Simple..........................
 
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