Return-Path: <13brv3@bellsouth.net> Received: from imf16aec.mail.bellsouth.net ([205.152.59.64] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 559200 for flyrotary@lancaironline.net; Tue, 07 Dec 2004 12:46:26 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.64; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf16aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20041207174557.WYPO1980.imf16aec.mail.bellsouth.net@rd> for ; Tue, 7 Dec 2004 12:45:57 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Nice to Have Re: ECU oxygen sensor Date: Tue, 7 Dec 2004 11:46:01 -0600 Message-ID: <000001c4dc84$9da55b30$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C4DC52.530D5C30" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C4DC52.530D5C30 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I thought that you had the EM2, but sometimes it's hard to keep = track of everybody's projects.... well, except John's & Rusty's :-) The EM2 really is the better way to go. =20 Todd=20 =20 =20 Hey, some of us don't have poopy diapers to change, so we have time for = the list :-) =20 =20 As for your EM-2 air/fuel display, does your engine run well at the mid-scale reading? My engine used to run at mid-scale on the old = mixture monitor gauge, but I have to be at about 8 bars on the EM-2. Tracy says = his runs fine at mid-scale on the EM-2, and of course I believe him, but = I've never been able to explain this. =20 =20 I did some testing with a variable voltage source, and these are my = notes: =20 3-30-04 =20 Checked the old mixture gauge, and found that it lights the first bar at .33V, the 5th bar (mid scale) at .86V, and the last bar at 1.4V. The = EM-2 lights a bar every .1V, with full scale at 1.0V. This is supposed to be = the way O2 sensors work, but my old gauge worked fine on the previous engine configuration.=20 =20 I ran the old gauge with the EM-2 for a while, and just accepted that my = new "normal" reading is 8 bars. =20 =20 There's a possibility that my old mixture monitor gauge was just wrong, = but I find it odd that mid-scale is right where the engine wanted to be. = Since you have one of these, and have the ability to fashion a variable = voltage source, would you test yours to see if the mid-scale reading is similar = to the .86V I found with mine? Since that gauge has colored markings, = perhaps the manufacturer centered the green range on .86V for a reason. I've thought about scaling my EM-2 down to make midrange "normal". It's = just one of those things that festers in the back of my brain and bothers me. = =20 =20 Cheers, Rusty (debating flaperons on the Kolb list) ------=_NextPart_000_0001_01C4DC52.530D5C30 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
    I thought that you had the EM2, but sometimes = it's hard to=20 keep track of everybody's projects.... well, except John's & Rusty's = :-)
The=20 EM2 really is the better way to go.
 
Todd 
 
 
Hey, some=20 of us don't have poopy diapers to change, so we have time for the list=20 :-)  
 
As for your=20 EM-2 air/fuel display, does your engine run well at the mid-scale=20 reading?  My engine used to run at mid-scale on the old mixture = monitor=20 gauge, but I have to be at about 8 bars on the EM-2.  Tracy = says his=20 runs fine at mid-scale on the EM-2, and of course I believe him, but = I've never=20 been able to explain = this.  
 
I did some=20 testing with a variable voltage source, and these are my=20 notes:
 

3-30-04

 

Checked the old mixture gauge, and found that it lights = the first=20 bar at .33V, the 5th bar (mid scale) at .86V, and the last = bar at=20 1.4V.  The EM-2 lights a = bar every=20 .1V, with full scale at 1.0V.  = This=20 is supposed to be the way O2 sensors work, but my old gauge worked fine = on the=20 previous engine configuration. 
 
I = ran the old=20 gauge with the EM-2 for a while, and just accepted that my = new "normal"=20 reading is 8 bars.  
 
There's a=20 possibility that my old mixture monitor gauge was just wrong, but I find = it odd=20 that mid-scale is right where the engine wanted to be.  Since you = have one=20 of these, and have the ability to fashion a variable voltage source, = would you=20 test yours to see if the mid-scale reading is similar to the .86V I = found with=20 mine?   Since that=20 gauge has colored markings, perhaps the manufacturer centered the green = range on=20 .86V for a reason.  I've thought about scaling my EM-2 down to make = midrange "normal".   It's just one of those things that = festers in the=20 back of my brain and bothers me. 
 
Cheers,
Rusty (debating=20 flaperons on the Kolb=20 list)
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