X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-fx0-f42.google.com ([209.85.161.42] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTPS id 5051624 for flyrotary@lancaironline.net; Thu, 14 Jul 2011 10:23:56 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.161.42; envelope-from=msteitle@gmail.com Received: by fxe23 with SMTP id 23so888773fxe.1 for ; Thu, 14 Jul 2011 07:23:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=yJyydwvpHw6u3HSP6xFnFpWqls14BJB6HAL7bpMPQOo=; b=uMoLloaL4f/DN/Ko0YEMOUuUnL7o4yZiAVSODXUfXJAM4/mGWJIzpd0f6oFdI4wP4s pWAaT9T4k5s3Wa+G43SgA+awTd2iE6mQ2dBqRvlezVeQBvuJV/DuhOP46/tb+4T3ChPU of7WYs6vJADKXAT5OVZuG2crXNegOniDoylNo= MIME-Version: 1.0 Received: by 10.223.27.71 with SMTP id h7mr3590465fac.142.1310653399816; Thu, 14 Jul 2011 07:23:19 -0700 (PDT) Received: by 10.223.73.208 with HTTP; Thu, 14 Jul 2011 07:23:19 -0700 (PDT) In-Reply-To: References: Date: Thu, 14 Jul 2011 09:23:19 -0500 Message-ID: Subject: Re: [FlyRotary] Re: High speed stumble continues From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=001517493c2451daed04a808469a --001517493c2451daed04a808469a Content-Type: text/plain; charset=ISO-8859-1 Brian, So, your motor came with the crank mounted CAS? My motor, a 20B-REW, came with the old style CAS that looks like a modified distributor, but without a distributor cap. I thought it would be a big improvement to go to the crank mounted CAS. As I said earlier, that didn't work out. I'm not sure exactly why, but Tracy mentioned that the 3-rotor (with its longer e-shaft) had more movement and could have been causing the mis-fire. So, you would need to go with the earlier front cover and also install the CAS gear on the crank. That could be tricky as the pile of parts on the front of the e-shaft sets the e-shaft end-play. But I'm sure it is do-able, just pay attention and use a dial indicator to check the end-play. Mark On Thu, Jul 14, 2011 at 9:09 AM, wrote: > I have the 13 BREW. What did you do to change back to the old style CAS? > Wouldn't I have to change the front cover and e-shaft? > > Brian Trubee > > > > -----Original Message----- > From: Mark Steitle > To: Rotary motors in aircraft > Sent: Thu, Jul 14, 2011 4:20 am > Subject: [FlyRotary] Re: High speed stumble continues > > Brian, > > Do you know anyone that would let you borrow their EC-2 to try? You want > one configured for the old style CAS. This is what I did and it confirmed > that the CAS was causing my problems (same as yours). I finally gave up on > the crank-mounted CAS and went back to the original style CAS. No more high > rpm mis-fires. > > Mark S. > > On Wed, Jul 13, 2011 at 9:20 PM, wrote: > >> I just installed the Magnecor wires, put on a smaller prop, re-routed the >> CAS sensor wires to a location further away from the secondary igntion >> leads, and ran up the engine. No joy- I still get lots of misfiring above >> 5200 RPM. Wondering if the issue might be with my EC2. >> I still have questions about how my CAS is wired, on the 13BREW the CAS is >> next to the trigger wheel, it consists of two hall effect sensors, one to >> count every 30 degress,and one that counts every 360 degrees. The EC2 has >> three wires going out to the CAS- one to provide voltage to both sensors, >> and one wire each (#22 & #23 ) to read each sensor. My question is- is >> polarity a possible issue with hall effect sensors? >> >> Also, does the EC@ fire both leading and trailing plugs simultaneously? >> >> Brian Trubee >> Grounded until further notice >> >> >> > --001517493c2451daed04a808469a Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Brian,=A0
So, your motor came with the crank mounted CAS? =A0My motor, = a 20B-REW, came with the old style CAS that looks like a modified distribut= or, but without a distributor cap. =A0I thought it would be a big improveme= nt to go to the crank mounted CAS. =A0As I said earlier, that didn't wo= rk out. =A0I'm not sure exactly why, but Tracy mentioned that the 3-rot= or (with its longer e-shaft) had more movement and could have been causing = the mis-fire. =A0

So, you would need to go with the earlier front cover a= nd also install the CAS gear on the crank. =A0That could be tricky as the p= ile of parts on the front of the e-shaft sets the e-shaft end-play. =A0But = I'm sure it is do-able, just pay attention and use a dial indicator to = check the end-play. =A0

Mark

On Thu, Jul 14, = 2011 at 9:09 AM, <b= ktrub@aol.com> wrote:
I have the 13 BREW. What did you do to change back to the old style CA= S? Wouldn't I have to change the front cover and e-shaft?
=A0
Brian Trubee



-----= Original Message-----
From: Mark Steitle <msteitle@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Thu, Jul 14, 2011 4:20 am
Subject: [FlyRotary] Re: High speed stumble continues

Brian,=A0

Do you know anyone that would let you borrow their EC-2 to try? =A0You= want one configured for the old style CAS. =A0This is what I did and it co= nfirmed that the CAS was causing my problems (same as yours). =A0I finally = gave up on the crank-mounted CAS and went back to the original style CAS. = =A0No more high rpm mis-fires. =A0

Mark S.

On Wed, Jul 13, 2011 at 9:20 PM, <bktrub@aol.com> wrote:
I just installed the Magnecor wires, put on a smaller prop, re-routed = the CAS sensor wires to a location further away from the secondary igntion = leads, and ran up the engine. No joy- I still get lots of misfiring above 5= 200 RPM. Wondering if the issue might be with my EC2.
I still have questions about how my CAS is wired, on the 13BREW the CAS is = next to the trigger wheel, it consists of two hall effect sensors, one to c= ount every 30 degress,and one that counts every 360 degrees. The EC2 has th= ree wires going out to the CAS- one to provide voltage to both sensors, and= one wire each (#22=A0 &=A0 #23 ) to read each sensor. My question is- = is polarity a possible issue with hall effect sensors?
=A0
Also, does the EC@ fire both leading and trailing plugs simultaneously= ?
=A0
Brian Trubee
Grounded until further notice

--001517493c2451daed04a808469a--