Return-Path: Received: from ms-smtp-02.southeast.rr.com ([24.93.67.83] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2588023 for flyrotary@lancaironline.net; Sun, 21 Sep 2003 13:19:02 -0400 Received: from o7y6b5 (clt78-020.carolina.rr.com [24.93.78.20]) by ms-smtp-02.southeast.rr.com (8.12.5/8.12.2) with SMTP id h8LHFCpN017759 for ; Sun, 21 Sep 2003 13:15:13 -0400 (EDT) Message-ID: <002d01c38064$2ed805e0$1702a8c0@WorkGroup> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: EC2 in-flight timing adjustment. Date: Sun, 21 Sep 2003 13:17:06 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002A_01C38042.A7834260" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_002A_01C38042.A7834260 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 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_002A_01C38042.A7834260 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Not Tracy, although sometimes I fool folks when I = don't have a=20 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 = degrees=20 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 static=20 timing per Tracy's instructions is important because what you are = really=20 setting -is the maximum advance for the system through the physical = adjustment=20 of the crank angle sensor.  Then when you adjust the timing you are = backing=20 off of that advance.  In other words, your maximum advance on the=20 controller is actually the minimum Retard position) =  However,=20 if you do what Tracy mentions in the first, clipped part of that = sentence, then=20 your timing above 3600 rpm would be closer to 20-23+5.625 or timing may = range=20 from 25.625 to 28.625 BTDC.
 
Ed Anderson
----- Original Message -----
From:=20 Tommy = James=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 timing=20 is advanced by 5.625 degrees more than nominal timing which is = typically 20 -=20 23 deg BTDC at rpm > 3600. "
Tracy
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