Return-Path: Received: from [65.54.169.123] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2588097 for flyrotary@lancaironline.net; Sun, 21 Sep 2003 15:47:48 -0400 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Sun, 21 Sep 2003 12:47:47 -0700 Received: from 65.137.50.158 by bay3-dav93.bay3.hotmail.com with DAV; Sun, 21 Sep 2003 19:47:47 +0000 X-Originating-IP: [65.137.50.158] X-Originating-Email: [lors01@msn.com] Reply-To: "Tracy Crook" From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: EC2 in-flight timing adjustment. Date: Sun, 21 Sep 2003 15:50:03 -0400 Organization: Real World Solutions Inc. MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0094_01C38058.056FDB80" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Message-ID: X-OriginalArrivalTime: 21 Sep 2003 19:47:47.0918 (UTC) FILETIME=[3BCCC6E0:01C38079] This is a multi-part message in MIME format. ------=_NextPart_000_0094_01C38058.056FDB80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Yes, Ed summarized it very well. Think of the 5.625 degrees as 'Vacuum = advance' on the old distributors. =20 Tommy also asked if best power timing was the same as best economy = timing. The manifold pressure advance was an attempt to achieve both. = I think its pretty close. If anyone wants to prove other wise, I would = welcome the info and will promptly incorporate it into the EC2 software. Tracy ----- Original Message -----=20 From: Ed Anderson=20 To: Rotary motors in aircraft=20 Sent: Sunday, September 21, 2003 1:17 PM Subject: [FlyRotary] Re: EC2 in-flight timing adjustment. Not Tracy, although sometimes I fool folks when I don't have a mustach = {:>) However, I think I can answer your question, Tommy. What Tracy is saying is that he is playing with his timing = advance/retard. Normally if you set the static timing like Tracy says = to do in his instructions, you would have the plug firing at between = 20-23 degrees Before Top Dead Center at any rpm greater that 3600 rpm. = (Remember, Tracy's system only retards the timing, it does not ADVANCE = it. When you think you are advancing the ignition time what you are = really doing is dialing in LESS retard. That is why setting the static = timing per Tracy's instructions is important because what you are really = setting -is the maximum advance for the system through the physical = adjustment of the crank angle sensor. Then when you adjust the timing = you are backing off of that advance. In other words, your maximum = advance on the controller is actually the minimum Retard position) = However, if you do what Tracy mentions in the first, clipped part of = that sentence, then your timing above 3600 rpm would be closer to = 20-23+5.625 or timing may range from 25.625 to 28.625 BTDC. Ed Anderson ----- Original Message -----=20 From: Tommy James=20 To: Rotary motors in aircraft=20 Sent: Sunday, September 21, 2003 12:26 PM Subject: [FlyRotary] Re: EC2 in-flight timing adjustment. Tracy,=20 Would you further explain this line? ".... The timing is advanced by 5.625 degrees more than nominal = timing which is typically 20 - 23 deg BTDC at rpm > 3600. " Tracy ------=_NextPart_000_0094_01C38058.056FDB80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Yes, Ed summarized it very well.   Think = of the=20 5.625 degrees as 'Vacuum advance' on the old distributors.  =
 
Tommy also asked if best power timing was the same = as best=20 economy timing.   The manifold pressure advance was an attempt = to=20 achieve both.  I think its pretty close.  If anyone wants to = prove=20 other wise, I would welcome the info and will promptly incorporate it = into the=20 EC2 software.
 
Tracy
 
----- Original Message -----
From:=20 Ed=20 Anderson
Sent: Sunday, September 21, = 2003 1:17=20 PM
Subject: [FlyRotary] Re: EC2 = in-flight=20 timing adjustment.

Not Tracy, although sometimes I fool folks when I = don't have=20 a mustach {:>)
 
However, I think I can answer your question,=20 Tommy.
 
What Tracy is saying is that he is playing with = his timing=20 advance/retard.  Normally if you set the static timing like Tracy = says to=20 do in his instructions, you would have the plug firing at between = 20-23=20 degrees Before Top Dead Center at any rpm greater that 3600 = rpm. (Remember, Tracy's system only retards the timing, it = does not=20 ADVANCE it.  When you think you are advancing the ignition time = what you=20 are really doing is dialing in LESS retard.  That is why setting = the=20 static timing per Tracy's instructions is important because what = you are=20 really setting -is the maximum advance for the system through the = physical=20 adjustment of the crank angle sensor.  Then when you adjust the = timing=20 you are backing off of that advance.  In other words, your = maximum=20 advance on the controller is actually the minimum Retard = position)=20  However, if you do what Tracy mentions in the first, clipped = part of=20 that sentence, then your timing above 3600 rpm would be closer to = 20-23+5.625=20 or timing may range from 25.625 to 28.625 BTDC.
 
Ed Anderson
----- Original Message -----
From:=20 Tommy James=20
To: Rotary motors in = aircraft=20
Sent: Sunday, September 21, = 2003 12:26=20 PM
Subject: [FlyRotary] Re: EC2 = in-flight=20 timing adjustment.

Tracy, 
Would you further explain = this=20 line?
 
 
"....  The=20 timing is advanced by 5.625 degrees more than nominal timing which = is=20 typically 20 - 23 deg BTDC at rpm > 3600. "
Tracy
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