Return-Path: Received: from [24.25.9.101] (HELO ms-smtp-02-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2) with ESMTP id 381305 for flyrotary@lancaironline.net; Fri, 27 Aug 2004 15:20:09 -0400 Received-SPF: none receiver=logan.com; client-ip=24.25.9.101; envelope-from=eanderson@carolina.rr.com Received: from EDWARD (cpe-069-132-183-211.carolina.rr.com [69.132.183.211]) by ms-smtp-02-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i7RJJaNs025211 for ; Fri, 27 Aug 2004 15:19:38 -0400 (EDT) Message-ID: <002501c48c6a$ccb236b0$2402a8c0@EDWARD> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Engine run Date: Fri, 27 Aug 2004 15:19:39 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0022_01C48C49.45603250" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0022_01C48C49.45603250 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable It actually depends on the curve of the particular make sensor, although = they are mostly the same. 450 -500 millivolts is where you find the = 14.7 sto..metric, 750 - 850 millivolts best power and way down around = 250-300 millivolts best economy or in that ball park. =20 Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC ----- Original Message -----=20 From: Finn Lassen=20 To: Rotary motors in aircraft=20 Sent: Friday, August 27, 2004 11:22 AM Subject: [FlyRotary] Re: Engine run Doesn't sound right. I thought 0.7 volts were best (sto...metric) = mixture. 0.8V volts more like best power and 0.6 and below getting lean. Finn Russell Duffy wrote: This is something that I've bugged Tracy about pretty extensively. = Mine does the same thing yours does, and Tracy says his doesn't. I used = to use the old gauge that Tracy sold, and I've done some testing with = it, and the EM-2 both connected (verified not to interfere with each = other). When the old gauge reads mid scale, the EM-2 is about 7-8 bars. = Since O2 sensors are supposed to put out 0-1V, mid scale should be .5V, = so I made a variable voltage source, and used it to simulate the O2 = sensor. At .5V, the EM-2 read mid scale like it's supposed to, and the = other gauge read below mid scale. From that, I concluded that the EM-2 = was doing what it was designed to do, but I can't explain why my "mid = scale" mixture is well above mid scale on the EM-2. I tried using a = new sensor, of the same type others are using, and it made no = difference. Now that you have me thinking about this again, I just made = a note to "fix" this in the calibration mode. =20 Good luck. Don't get discouraged. Rusty (caught up) ------=_NextPart_000_0022_01C48C49.45603250 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
It actually depends on the curve of the = particular=20 make sensor, although they are mostly the same.  450 -500 = millivolts is=20 where you find the 14.7 sto..metric, 750 - 850 millivolts best power and = way=20 down around 250-300  millivolts best economy or in that ball = park. =20
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From:=20 Finn=20 Lassen
Sent: Friday, August 27, 2004 = 11:22=20 AM
Subject: [FlyRotary] Re: Engine = run

Doesn't sound right. I thought 0.7 volts were best=20 (sto...metric) mixture.
0.8V volts more like best power and 0.6 and = below=20 getting lean.

Finn

Russell Duffy wrote:

This is something = that I've bugged=20 Tracy about pretty extensively.  Mine does the same thing yours = does,=20 and Tracy says his doesn't.  I used to use the old gauge that = Tracy=20 sold, and I've done some testing with it, and the EM-2 both = connected=20 (verified not to interfere with each other).  When the old = gauge reads=20 mid scale, the EM-2 is about 7-8 bars.  Since O2 sensors are = supposed=20 to put out 0-1V, mid scale should be .5V, so I made a variable = voltage=20 source, and used it to simulate the O2 sensor.  At .5V, the = EM-2 read=20 mid scale like it's supposed to, and the other gauge read below mid=20 scale.  From that, I concluded that the EM-2 was doing what it = was=20 designed to do, but I can't explain why my "mid scale" mixture is = well above=20 mid scale on the EM-2.   I tried using a new sensor, = of the=20 same type others are using, and it made no difference.  Now = that you=20 have me thinking about this again, I just made a note to "fix" this=20 in the calibration mode.   

Good luck.  Don't get=20 discouraged.

Rusty (caught=20 up)

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