X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-d22.mx.aol.com ([205.188.144.208] verified) by logan.com (CommuniGate Pro SMTP 5.2.4) with ESMTP id 2994237 for flyrotary@lancaironline.net; Fri, 27 Jun 2008 12:17:42 -0400 Received: from WRJJRS@aol.com by imo-d22.mx.aol.com (mail_out_v38_r9.4.) id q.cb3.35a3afc1 (34930) for ; Fri, 27 Jun 2008 12:17:35 -0400 (EDT) Received: from WEBMAIL-NB01 (webmail-nb01.sim.aol.com [207.200.69.193]) by cia-da04.mx.aol.com (v121.5) with ESMTP id MAILCIADA043-88724865129e159; Fri, 27 Jun 2008 12:17:35 -0400 References: To: flyrotary@lancaironline.net Subject: Re: [FlyRotary] Re: Running lean of peak Date: Fri, 27 Jun 2008 12:17:34 -0400 X-AOL-IP: 66.253.96.220 In-Reply-To: X-MB-Message-Source: WebUI MIME-Version: 1.0 From: wrjjrs@aol.com X-MB-Message-Type: User Content-Type: multipart/alternative; boundary="--------MB_8CAA6887167C741_1724_1201_WEBMAIL-NB01.sysops.aol.com" X-Mailer: AOL Webmail 37563-STANDARD Received: from 66.253.96.220 by WEBMAIL-NB01.sysops.aol.com (207.200.69.193) with HTTP (WebMailUI); Fri, 27 Jun 2008 12:17:34 -0400 Message-Id: <8CAA688710ACC00-1724-8FF@WEBMAIL-NB01.sysops.aol.com> X-Spam-Flag:NO ----------MB_8CAA6887167C741_1724_1201_WEBMAIL-NB01.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Al, something else to think about. If you run lean mixtures is you may want=20= to run the widest plug gap you can easily fire. The reason is that when doin= g lean operation studies engine manufacturers have found that a strong spark= and wide gap is best to reliably ignite lean mixtures. Regular piston engin= es won't run as lean as a rotary, and they still run very large gaps. Ford h= as used hot coils and a .060-.070 gap. (It looks huge) Just an FYI. Bill Jepson -----Original Message----- From: Kelly Troyer To: Rotary motors in aircraft Sent: Thu, 26 Jun 2008 8:14 pm Subject: [FlyRotary] Re: Running lean of peak =C2=A0 What plugs are you using currently Al ??..............Might be worth=20= a new set of plugs and a test flight before your trip to see if you get the same sympt= oms when leaning........Even though I have heard of leaning up to 200 LOP I do believe 100 to 150 LOP is a more practical range.........=C2=A0 -- Kelly Troyer=20 "Dyke Delta"_13B ROTARY Engine=20 "RWS"_RD1C/EC2/EM2=20 "Mistral"_Backplate/Oil Manifold=20 =C2=A0 -------------- Original message from "Al Gietzen" : ----= ----------=20 =C2=A0 Al, =C2=A0How many hours are on your sparkplugs and are you useing auto fuel or=20= 100LL.........Something to consider before a 2000 mile trip.........Could be possible indication before= the dreaded "SAG".......... =C2=A0 I don=E2=80=99t recall (have to check the engine log), but I=E2=80=99d guess= maybe 20 hrs; only 10 ga 100LL; all the rest unleaded mogas. =C2=A0I took a= leading and trailing out yesterday to look at them and they look fine. =C2=A0 Al =C2=A0 -------------- Original message from "Al Gietzen" : ----= ----------=20 I=E2=80=99m finding that at about 100F LOP I sense that the engine is starti= ng to not like it =E2=80=93 like it doesn=E2=80=99t seem to be entirely smoo= th; maybe an occasional miss here and there.=C2=A0 Am I right that some of y= ou guys run as much as 200 LOP; or is it my imagination =E2=80=93 in both ca= ses. =C2=A0 Would timing setting have much of anything to do with running LOP? =C2=A0 Just past by the 100 hr mark on the engine near the end of a 500 mile trip o= n Monday. =C2=A0I plan to leave next Monday on a round trip of over 2000 nm=20= over the following week.=C2=A0 That=E2=80=99ll rack up a few hours. =C2=A0 Al ----------MB_8CAA6887167C741_1724_1201_WEBMAIL-NB01.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="utf-8" Al, something else to think about. If you run lean mixtures is you may want=20= to run the widest plug gap you can easily fire. The reason is that when doin= g lean operation studies engine manufacturers have found that a strong spark= and wide gap is best to reliably ignite lean mixtures. Regular piston engin= es won't run as lean as a rotary, and they still run very large gaps. Ford h= as used hot coils and a .060-.070 gap. (It looks huge) Just an FYI.
Bill Jepson


-----Original Message-----
From: Kelly Troyer <keltro@att.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Thu, 26 Jun 2008 8:14 pm
Subject: [FlyRotary] Re: Running lean of peak

  What plugs are you using currently Al ??..............Might be w= orth a new set
of plugs and a test flight before your trip to see if you get the same=20= symptoms
when leaning........Even though I have heard of leaning up to 200 LOP I= do
believe 100 to 150 LOP is a more practical range......... 
--
Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold



 
-------------- Original message from "Al Gietzen" <ALVentures@cox.net>: --------------
 
Al,
 How many hours are on=20= your sparkplugs and are you useing auto fuel or 100LL.........Something to
consider before a 2000 mile=20= trip.........Could be possible indication before the dreaded "SAG"..........=
=  
I don=E2=80=99t rec= all (have to check the engine log), but I=E2=80=99d guess maybe 20 hrs; only= 10 ga 100LL; all the rest unleaded mogas.  I took a leading and traili= ng out yesterday to look at them and they look fine.
 = ;
Al
 
-------------- Original message from "Al Gietzen" <ALVentures@cox.net>: --------------
I=E2=80=99m find= ing that at about 100F LOP I sense that the engine is starting to not like i= t =E2=80=93 like it doesn=E2=80=99t seem to be entirely smooth; maybe an occ= asional miss here and there.  Am I right that some of you guys run as m= uch as 200 LOP; or is it my imagination =E2=80=93 in both cases.
 
Would timing set= ting have much of anything to do with running LOP?
 
Just past by the= 100 hr mark on the engine near the end of a 500 mile trip on Monday.  = I plan to leave next Monday on a round trip of over 2000 nm over the followi= ng week.  That=E2=80=99ll rack up a few hours.
 
Al=
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