X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-d22.mx.aol.com ([205.188.144.208] verified) by logan.com (CommuniGate Pro SMTP 5.1.12) with ESMTP id 2337531 for flyrotary@lancaironline.net; Tue, 18 Sep 2007 10:11:56 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.144.208; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-d22.mx.aol.com (mail_out_v38_r9.2.) id q.bd9.1b730a2e (37532) for ; Tue, 18 Sep 2007 10:11:14 -0400 (EDT) Received: from webmail-da07 (webmail-da07.webmail.aol.com [205.188.212.202]) by cia-mb01.mx.aol.com (v119.9) with ESMTP id MAILCIAMB015-929c46efdc81e; Tue, 18 Sep 2007 10:11:14 -0400 References: To: flyrotary@lancaironline.net Subject: Re: [FlyRotary] DEFAULT iGNITION TIMING was Re: One for the guys that don't give up Date: Tue, 18 Sep 2007 10:11:13 -0400 In-Reply-To: X-MB-Message-Source: WebUI MIME-Version: 1.0 From: wrjjrs@aol.com X-MB-Message-Type: User Content-Type: multipart/alternative; boundary="--------MB_8C9C814E792BC78_614_A2B6_webmail-da07.sysops.aol.com" X-Mailer: AOL WebMail 30583 Received: from 65.161.241.3 by webmail-da07.sysops.aol.com (205.188.212.202) with HTTP (WebMailUI); Tue, 18 Sep 2007 10:11:13 -0400 Message-Id: <8C9C814E792BC78-614-500A@webmail-da07.sysops.aol.com> X-AOL-IP: 205.188.212.202 X-Spam-Flag: NO ----------MB_8C9C814E792BC78_614_A2B6_webmail-da07.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="iso-8859-1" Thanks Ed et all, I wasn't familiar with the standard retard. That is a method used by several= systems so I would guess it's easier to do it that way! Bill Jepson -----Original Message----- From: Ed Anderson To: Rotary motors in aircraft Sent: Tue, 18 Sep 2007 4:49 am Subject: [FlyRotary] DEFAULT iGNITION TIMING was Re: One for the guys that d= on't give up Bob's right on the money about the ignition timing. Tracy's instructions hav= e you set up 35Deg BTDC as the static timing. That becomes the maximum possi= ble ignition advance. But, the EC2 electronically backs off (retards this) t= o 25Deg BTDC as the default ignition timing on start up (assuming you have s= et 35 deg BTDC as your static).=A0 =A0 Then if you want more ignition advance, you use the mode 8? to advance or re= tard the ignition up to 10 degrees or retard it 10 degrees - either way from= the 25 deg BTDC default. Max power (at sea level) for a two rotor is close=20= to 25-27 deg advance for an N/A engine=A0 =A0 I don't really know what happens if say you set the static at 25 degrees rat= her than 35 BTDC. If the EC2 automatically backs off 10 degrees from your st= atic for its default (which I believe it does), then your default timing at=20= start up (if you set 25 deg static instead of 35) would be 15 degrees BTDC w= hich is way too retarded for an N/A engine.=A0 =A0 Ed=A0 =A0 ----- Original Message ----- From: "Bob White" =A0 To: "Rotary motors in aircraft" =A0 Sent: Tuesday, September 18, 2007 12:27 AM=A0 Subject: [FlyRotary] Re: One for the guys that don't give up=A0 =A0 Hi Al,=A0 =A0 Tracy's EC2 uses 35BTDC static timing as a starting point. The=A0 computer changes the actual timing to something else.=A0 =A0 Bob W.=A0 =A0 On Mon, 17 Sep 2007 23:35:00 EDT=A0 WRJJRS@aol.com wrote:=A0 =A0 >=A0 > In a message dated 9/17/2007 5:23:02 PM Pacific Standard Time,=A0 > ALVentures@cox.net writes:=A0 >=A0 > I have all the latest updates on the EC2, and I have double checked the= =A0 > static timing set at 35o BTDC. From that point on the EC2 is handling > th= e timing=A0 > curve with rpm and MAP.=A0 >=A0 >=A0 > Al, was 35=B0 BTDC Tracys suggested timing? That sounds like too much lead= > to=A0 > me. I thought the base timing was closer to 25=B0 than 35=B0. Not certain,= but=A0 > that is the way I remember it. I think Lynn metioned running 28=B0 total.=20= > Just the=A0 > way I remember it I certainly could be wrong.=A0 > Bill Jepson=A0 >=A0 >=A0 >=A0 > ************************************** See what's new at > http://www.aol.= com=A0 >=A0 =A0 -- N93BD - Rotary Powered BD-4 - http://www.bob-white.com=A0 3.8 Hours Total Time and holding=A0 Cables for your rotary installation - http://www.roblinphoto.com/shop/=A0 =A0 --=A0 Homepage: http://www.flyrotary.com/=A0 Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.htm= l=A0 =A0 --=A0 Homepage: http://www.flyrotary.com/=A0 Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.htm= l=A0 ________________________________________________________________________ Email and AIM finally together. You've gotta check out free AOL Mail! - http= ://mail.aol.com ----------MB_8C9C814E792BC78_614_A2B6_webmail-da07.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="iso-8859-1"
Thanks Ed et all,
I wasn't familiar with the standard retard. That is a method used by se= veral systems so I would guess it's easier to do it that way!
Bill Jepson


-----Original Message-----
From: Ed Anderson <eanderson@carolina.rr.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Tue, 18 Sep 2007 4:49 am
Subject: [FlyRotary] DEFAULT iGNITION TIMING was Re: One for the guys that d= on't give up

Bob's right on the money about the ignition= timing. Tracy's instructions have you set up 35Deg BTDC as the static timin= g. That becomes the maximum possible ignition advance. But, the EC2 electron= ically backs off (retards this) to 25Deg BTDC as the default ignition timing= on start up (assuming you have set 35 deg BTDC as your static). 
 
Then if you want more ignition advance, you use the mode 8? to advance or re= tard the ignition up to 10 degrees or retard it 10 degrees - either way from= the 25 deg BTDC default. Max power (at sea level) for a two rotor is close=20= to 25-27 deg advance for an N/A engine 
 
I don't really know what happens if say you set the static at 25 degrees rat= her than 35 BTDC. If the EC2 automatically backs off 10 degrees from your st= atic for its default (which I believe it does), then your default timing at=20= start up (if you set 25 deg static instead of 35) would be 15 degrees BTDC w= hich is way too retarded for an N/A engine. 
 
Ed 
 
----- Original Message ----- From: "Bob White" <rlwhite@comcast.net> 
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net> 
Sent: Tuesday, September 18, 2007 12:27 AM 
Subject: [FlyRotary] Re: One for the guys that don't give up 
 
Hi Al, 
 
Tracy's EC2 uses 35BTDC static timing as a starting point. The 
computer changes the actual timing to something else. 
 
Bob W. 
 
On Mon, 17 Sep 2007 23:35:00 EDT 
WRJJRS@aol.com wrote: 
 
> 
> In a message dated 9/17/2007 5:23:02 PM Pacific Standard Time,  > ALVentures@cox.net writes:&nb= sp;
> 
> I have all the latest updates on the EC2, and I have double checked the=  
> static timing set at 35o BTDC. From that point on the EC2 is handling &= gt; the timing 
> curve with rpm and MAP. 
> 
> 
> Al, was 35=B0 BTDC Tracys suggested timing? That sounds like too much l= ead > to 
> me. I thought the base timing was closer to 25=B0 than 35=B0. Not certa= in, but 
> that is the way I remember it. I think Lynn metioned running 28=B0 tota= l. > Just the 
> way I remember it I certainly could be wrong. 
> Bill Jepson 
> 
> 
> 
> ************************************** See what's new at > http://www.aol.com 
> 
 
-- N93BD - Rotary Powered BD-4 - http://www.bob-white.com 
3.8 Hours Total Time and holding 
Cables for your rotary installation - http://www.roblinphoto.com/shop/ 
 
-- 
Homepage: http://www.f= lyrotary.com/ 
Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrota= ry/List.html 
 
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Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrota= ry/List.html 
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