X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-bw0-f211.google.com ([209.85.218.211] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3748577 for flyrotary@lancaironline.net; Tue, 07 Jul 2009 19:22:14 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.218.211; envelope-from=msteitle@gmail.com Received: by bwz7 with SMTP id 7so5241382bwz.19 for ; Tue, 07 Jul 2009 16:21:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=dyFv//qekGegJbhv5YaSaWt552seFacY+cgBgW05TIE=; b=MHRznSdyGqB88nplg2y60nPm1a0RLAXQ7Yt5Sw19QGKNBFspsswJSRbSkIoatYTGJ6 6NVIXz3GQMOPGf5Khfpbn4CB515wVnDhcquowd7ayPMriXhxLaEIzuQen87g3hvI1BLO 5D/860E9muEhAVnd10MRhrGLr1tZNfK4Xo9Ck= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=guHkizYpTeI1Wcmm9WadnLZuIdmdVjPTgcvEiOQEuzu/rm3le+XtyrDIK7GiDMxIvu NLAOK1PZpxgRVjdUNXAVzdWqf6/k1pYUKTwf6ycR1fSEejs0NWCgzSBvE1YqDOJKTlY/ zy/7FlUTYnpzsNOWeNjSbegQYyxSksDb+3G+M= MIME-Version: 1.0 Received: by 10.204.101.13 with SMTP id a13mr6320851bko.89.1247008896214; Tue, 07 Jul 2009 16:21:36 -0700 (PDT) In-Reply-To: References: Date: Tue, 7 Jul 2009 18:21:36 -0500 Message-ID: <5cf132c0907071621w4a7bf6f6p108361fdb165bb16@mail.gmail.com> Subject: Re: [FlyRotary] O2 sensor and Lead: [FlyRotary] Re: SAG - NKG From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0016e6dd8d7e4a66ad046e25e29f --0016e6dd8d7e4a66ad046e25e29f Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Ed, I'm on my second O2 sensor, but only because I physically damaged the first one. ;-0 Mark S. On Tue, Jul 7, 2009 at 5:04 PM, Ed Anderson wrot= e: > > > Mark, I have flow over 400 hours using primarily 100LL. > > > > For our use of the O2 sensor=96 that is for use as an Air/Fuel ratio indi= ctor > - the lead in the gasoline has no noticeable effect. My understanding is > that continued use of leaded fuel can render the O2 useless for the purpo= se > for which it is used in an automobile to keep the mixture at stoichiometr= ic. > There is a hysteresis response curve of the sensor that is important in > performing this function and apparently the lead greatly impairs this > function. However, for our use all we are interested in is the 0 =96 1 v= olt > output. Whether it occurs in 1 msec or 10 msec or 100 msec response time= is > undetectable to our human senses. In any case, I am on my second O2 sens= or > =96 not because the old one quit working but it did seem to be getting a = bit > less sensitive and the range did not seem to extend as far. So based on = my > experience, I doubt you have done any serious damage to your O2 sensor. > > > > YMMV > > Ed Anderson > > Rv-6A N494BW Rotary Powered > > Matthews, NC > > eanderson@carolina.rr.com > > http://www.andersonee.com > > http://www.dmack.net/mazda/index.html > > http://www.flyrotary.com/ > > http://members.cox.net/rogersda/rotary/configs.htm#N494BW > > http://www.rotaryaviation.com/Rotorhead%20Truth.htm > ------------------------------ > > *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] *O= n > Behalf Of *Mark Steitle > *Sent:* Tuesday, July 07, 2009 4:58 PM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: SAG - NKG > > > > Kelly, > > > > I had to resort to using 100LL on my recent trip from Austin to Denver an= d > back. I burned a total of 56 gallons of 100LL. This was mixed with what > was left in the tanks at the time (approx 40 gallons), so it was a blend = of > mogas and 100LL. I looked at the plugs after arriving back in Austin and > observed a distinct whitish residue around the thread base, but none on t= he > center or ground electrodes. It was still running fine when I arrived, a= nd > I refueled the following day with 40 gallons of Valero mogas. Most of my > flying allows me to refuel at my home base, so it will probably be quite = a > while before I burn enough 100LL to make any reasonable assessment. > > > > Quite frankly, I was more concerned with the effect the 100LL had on the = O2 > sensor. I didn't notice any change in my mixture readings though. > > > > Mark S. > > On Tue, Jul 7, 2009 at 11:26 AM, Kelly Troyer wrote: > > Mark, > > Be sure to update the group on how many hours you get on the Renesis > (Iridium) plugs > > before "SAG".............I know you primarily use auto fuel which will > retard the onset of > > "SAG" a lot but if you have to use aviation low lead periodically on > X-country flights > > you might figure what the percentage was of auto (versus) low lead used > during the hours > > before "SAG" reared its ugly head................ > > -- > Kelly Troyer > "Dyke Delta"_13B ROTARY Engine > "RWS"_RD1C/EC2/EM2 > "Mistral"_Backplate/Oil Manifold > > -------------- Original message from Mark Steitle : > -------------- > > John, > > > > I've been running Renesis (irridium) plugs in my 20B with good results. = Of > course, they're about 5 times the price of the standard plugs. But if th= ey > last 5 times longer, I feel that they are worth the price. > > > > Mark S. > > > > > --0016e6dd8d7e4a66ad046e25e29f Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Ed,
=A0
I'm on my second O2 sensor, but only because I physically damaged = the first one.=A0 ;-0
=A0
Mark S.

On Tue, Jul 7, 2009 at 5:04 PM, Ed Anderson <eanderson@ca= rolina.rr.com> wrote:

=A0

Mark, I have flow over 400 hours us= ing primarily 100LL.=A0

=A0

For our use of the O2 sensor=96 tha= t is for use as an Air/Fuel ratio indictor - the lead in the gasoline has n= o noticeable effect.=A0 My understanding is that continued use of leaded fu= el can render the O2 useless for the purpose for which it is used in an aut= omobile to keep the mixture at stoichiometr= ic. There is a hysteresis resp= onse curve of the sensor that is important in performing this function and = apparently the lead greatly impairs this function.=A0 However, for our use = all we are interested in is the 0 =96 1 volt output.=A0 Whether it occurs i= n 1 msec or 10 msec or 100 msec response time is undetectable to our human = senses.=A0 In any case, I am on my second O2 sensor =96 not because the old= one quit working but it did seem to be getting a bit less sensitive and th= e range did not seem to extend as far.=A0 So based on my experience, I doub= t you have done any serious damage to your O2 sensor.

=A0

YMMV

From: Rota= ry motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle
Sent: Tuesday, July 07, 200= 9 4:58 PM
To: Rotary mot= ors in aircraft
Subject:= [FlyRotary] Re: SAG - NKG

= Mark S.=A0

keltro@att.net> wrote:

= -------------- Original message from Mark S= teitle <msteitle= @gmail.com>: --------------

= Mark S.=A0