Return-Path: Received: from [199.185.220.220] (HELO priv-edtnes56.telusplanet.net) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 559962 for flyrotary@lancaironline.net; Wed, 08 Dec 2004 04:04:15 -0500 Received-SPF: pass receiver=logan.com; client-ip=199.185.220.220; envelope-from=haywire@telus.net Received: from Endurance ([207.81.25.155]) by priv-edtnes56.telusplanet.net (InterMail vM.6.01.03.02 201-2131-111-104-20040324) with SMTP id <20041208090344.RTOC10285.priv-edtnes56.telusplanet.net@Endurance> for ; Wed, 8 Dec 2004 02:03:44 -0700 From: "Todd Bartrim" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Nice to Have Re: ECU oxygen sensor Date: Wed, 8 Dec 2004 01:03:41 -0800 Message-ID: <000801c4dd04$d11c5880$0201a8c0@Endurance> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01C4DCC1.C2F91880" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2910.0) 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_0009_01C4DCC1.C2F91880 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Message 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. Sort of. It will run well there if I can keep the mixture right there, but it seems unstable and wants to fluctuate alot when below ~75% scale, so thats where I usually tune for (no idea how many bars that is), however it much the same or slightly higher with the mixture monitor, ~75% to 85% scale. 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. I can do this but it'll have to wait untill next week when I'm back to work, as I'm on vacation this week. I'm dealing on a piece of land where we will build a log home and hopefully my own airstrip. I'm also dealing on a 25 ton excavator I'd like to buy to shape the land (re: airstrip), so if successful on both counts I may have very little spare time for the list or flying for the next 2 years. Cheers, Todd (feeling much pain from hockey injuries... need beer!) ------=_NextPart_000_0009_01C4DCC1.C2F91880 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
 
As for=20 your 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=20 never been able to explain=20 this.  
Sort of.=20 It will run well there if I can keep the mixture right there, but it = seems=20 unstable and wants to fluctuate alot when below ~75% scale, so thats = where I=20 usually tune for (no idea how many bars that is), however it much the = same or=20 slightly higher with the mixture monitor, ~75% to 85%=20 scale.
  
 
There's a=20 possibility that my old mixture monitor gauge was just wrong, but I = find it=20 odd that mid-scale is right where the engine wanted to be.  Since = you=20 have one of these, and have the ability to fashion a variable voltage = source,=20 would you test yours to see if the mid-scale reading is similar to the = .86V I=20 found with mine?   Since that gauge has colored markings, perhaps the = manufacturer=20 centered the green range on .86V for a reason.  I've thought = about=20 scaling my EM-2 down to make midrange "normal".   It's just = one of=20 those things that festers in the back of my brain and bothers = me. =20
I can=20 do this but it'll have to wait untill next week when I'm back to work, = as I'm=20 on vacation this week. I'm dealing on a piece of land where we will = build a=20 log home and hopefully my own airstrip. I'm also dealing on a 25 ton = excavator=20 I'd like to buy to shape the land (re: airstrip), so if = successful on=20 both counts I may have very little spare time for the list or flying = for the=20 next 2 years.
 
Cheers,
Todd=20 (feeling much pain from hockey injuries... need=20 = beer!)
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