X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost02.isp.att.net ([207.115.11.52] verified) by logan.com (CommuniGate Pro SMTP 5.3c3) with ESMTP id 3992815 for flyrotary@lancaironline.net; Fri, 27 Nov 2009 09:46:36 -0500 Received-SPF: none receiver=logan.com; client-ip=207.115.11.52; envelope-from=keltro@att.net DKIM-Signature: v=1; q=dns/txt; d=att.net; s=dkim01; i=keltro@att.net; a=rsa-sha256; c=relaxed/relaxed; t=1259333196; h=Content-Type: MIME-Version:In-Reply-To:Message-Id:Date:Subject:To:From; bh=FVU37u sVCorBNAU4QLs2p9me6ZVPLjYme3nsxv5VgNU=; b=Hcr6plne9m0rKYkeO55+PDF7o x61vBZF3yu3Kaq698cQRXgbpDIvitp3uFp2fSDnL8GNgxPZTwGMmJplfajAPg== Received: from fwebmail33.isp.att.net ([204.127.221.133]) by isp.att.net (frfwmhc02) with SMTP id <20091127144601H0200l78n2e>; Fri, 27 Nov 2009 14:46:01 +0000 X-Originating-IP: [204.127.221.133] Received: from [208.114.32.125] by fwebmail33.isp.att.net; Fri, 27 Nov 2009 14:46:00 +0000 From: "Kelly Troyer" To: "Rotary motors in aircraft" Subject: Ground isn't ground Date: Fri, 27 Nov 2009 14:46:00 +0000 Message-Id: <112720091446.17125.4B0FE6280005041B000042E522243323629B0A02D29B9B0EBF019D9B040A05@att.net> In-Reply-To: X-Mailer: AT&T Message Center Version 1 (Mar 2 2009) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_17125_1259333160_0" --NextPart_Webmail_9m3u9jl4l_17125_1259333160_0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Steve, I have been following this informative exchange with great interest and = even with my limited knowledge am able to digest it............Thanks for your work in determining what is= going on inside Tracy's little gray EC2/EC3 boxes in an effort to troubleshoot apparent ignition problems = that some of the group are having or have had in the past..............One thing am curious about = ( And I may have missed the answer) is the reason you have two EC2's ?...............Do you just have a= spare or are you actually flying with both for "Super Redundancy" ??................... -- Kelly Troyer=20 "Dyke Delta"_13B ROTARY Engine=20 "RWS"_RD1C/EC2/EM2=20 "Mistral"_Backplate/Oil Manifold=20 -------------- Original message from "Steven W. Boese" : -= -------------=20 > Tracy,=20 > One of the EC2's was updated 01/30/2009 and the other was updated 05/04/2= 009. While there is a difference in these two EC2's as to how they determin= e which regions of the MAP table to use, they both are similar with regard = to the low=20 > RPM coil dwell times.=20 > Abnormally short (or long) dwell times are observed from the minimum RPM = that the EC2 generates signals up to the "threshold" at around 1200 RPM. Ab= ove that=20 > threshold, dwell times are consistently in the range of 4-5 ms.=20 >=20 > Steve Boese=20 >=20=20 > Crook [tracy@rotaryaviation.com]=20 > Sent: Thursday, November 26, 2009 8:05 PM=20 > To: Rotary motors in aircraft=20 > Subject: [FlyRotary] Re: Ground isn't ground=20 > Steve, I was looking at the wrong image (the one you sent of the CAS & dw= ell at cranking speed of ~150 rpm.) . I must have missed this other one whe= n you=20 > posted it. I'll take a look at the 1200 rpm dwell behavior again. I never= =20 > noticed that. Possibly because 1200 is well above cranking speed but belo= w my=20 > idle speed of 1600 rpm.=20 >=20 > Do you recall the date of your last EC2 update? The low rpm dwell algorit= hm has=20 > changed a few times.=20 >=20 > Tracy=20 --NextPart_Webmail_9m3u9jl4l_17125_1259333160_0 Content-Type: multipart/related; boundary="NextPart_Webmail_9m3u9jl4l_17125_1259333160_1" --NextPart_Webmail_9m3u9jl4l_17125_1259333160_1 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable

Steve,

I have been following this informative exchange with grea= t interest and even with my limited knowledge

am able to digest it............Thanks for your work in determining wh= at is going on inside Tracy's little

gray EC2/EC3 boxes in an effort to troubleshoot apparent ignition prob= lems that some of the group

are having or have had in the past..............One thing am curi= ous about ( And I may have missed the

answer) is the reason you have two EC2's ?...............Do you j= ust have a spare or are you actually

flying with both for "Super Redundancy" ??...................

--
Kelly Troyer
"Dyke Delta"_1= 3B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifol= d

-------------- Original message from "Steven W. Boese" <S= Boese@uwyo.edu>: --------------

> Tracy,
> One of = the EC2's was updated 01/30/2009 and the other was updated 05/04/2009. Whil= e there is a difference in these two EC2's as to how they determine which r= egions of the MAP table to use, they both are similar with regard to the lo= w
> RPM coil dwell times.
> Abnormally short (or long) dwell = times are observed from the minimum RPM that the EC2 generates signals up t= o the "threshold" at around 1200 RPM. Above that
> threshold, dwell = times are consistently in the range of 4-5 ms.
>
> Steve Boes= e
>
> Crook [tracy@rotaryaviation.com]
> Sent: T= hursday, November 26, 2009 8:05 PM
> To: Rotary motors in aircraft <= BR>> Subject: [FlyRotary] Re: Ground isn't ground
> Steve, I was = looking at the wrong image (the one you sent of the CAS & dwell at cran= king speed of ~150 rpm.) . I must have missed this other one when you
&= gt; posted it. I'll take a look at the 1200 rpm dwell behavior again. I nev= er
> noticed that. Possibly because 1200 is well above cranking spee= d but below my
> idle speed of 1600 rpm.
>
> Do you re= call the date of your last EC2 update? The low rpm dwell algorithm has
= > changed a few times.
>
> Tracy

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