X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 20 [X] Return-Path: Received: from mtiwmhc12.worldnet.att.net ([204.127.131.116] verified) by logan.com (CommuniGate Pro SMTP 5.1.7) with ESMTP id 1940109 for flyrotary@lancaironline.net; Sat, 24 Mar 2007 00:29:26 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.131.116; envelope-from=keltro@att.net Received: from mwebmail19.att.net ([204.127.135.58]) by worldnet.att.net (mtiwmhc12) with SMTP id <20070324042828112003r8nae>; Sat, 24 Mar 2007 04:28:38 +0000 Received: from [4.245.53.71] by mwebmail19.att.net; Sat, 24 Mar 2007 04:28:27 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: Re: Fuel grade for renessis Date: Sat, 24 Mar 2007 04:28:27 +0000 Message-Id: <032420070428.23225.4604A8EB0005750E00005AB92160281060019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Mar 8 2007) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_23225_1174710507_0" --NextPart_Webmail_9m3u9jl4l_23225_1174710507_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit 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.......................... --NextPart_Webmail_9m3u9jl4l_23225_1174710507_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

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..........................

--NextPart_Webmail_9m3u9jl4l_23225_1174710507_0--