X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-fx0-f52.google.com ([209.85.161.52] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTPS id 5027236 for flyrotary@lancaironline.net; Tue, 21 Jun 2011 08:11:14 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.161.52; envelope-from=msteitle@gmail.com Received: by fxm6 with SMTP id 6so1968019fxm.25 for ; Tue, 21 Jun 2011 05:10:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:content-type; bh=R4M54DcKhakhnBcjTc3C6apBOFKZOy9RWi0FJCsmOSM=; b=ai7ybRkcrUP8p7cNa0H09PR8NQCQbiQu9bw985x0nt/QnAos3mJroAPm0RCl5e6qtn BjcGI4tyIt+PYefbpgtkkkCEPOqWadooq9LqEsy006XUfFlE7zRHxlzuNNgLdLGYxBT1 Fyyi+esaIT0fZLa5y1YvzPwRxG7KRHQwKLtBI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=QWgF2c6HORazs39auvogyDipwPpbZg6NNd3G9PrU8zn9sU350NecmQreiH7ceYdETw cXVGO72pUHpXEqaluy0x8GA+YAXAWOZ/uiksVhQ8yT5uEwQ4GGMga005MlsWSIlmeybo KRK7HzecWOreFankSY0W82yfaJ0YwPixQM184= MIME-Version: 1.0 Received: by 10.223.79.9 with SMTP id n9mr3433631fak.44.1308658236408; Tue, 21 Jun 2011 05:10:36 -0700 (PDT) Received: by 10.223.101.134 with HTTP; Tue, 21 Jun 2011 05:10:36 -0700 (PDT) In-Reply-To: References: Date: Tue, 21 Jun 2011 07:10:36 -0500 Message-ID: Subject: Re: [FlyRotary] This has got to stop From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=20cf3054a38b50449f04a637bd5c --20cf3054a38b50449f04a637bd5c Content-Type: text/plain; charset=ISO-8859-1 Brian, Your symptoms are exactly what I fought with for over a year with my 20B. The problem turned out to be the CAS. I had thought it would be a big improvement to go with the Renesis type CAS, so I had Tracy convert my EC-2 to work with the crank mount CAS, and I added a trigger wheel and bracket to the front of my engine. Depending on the sensor gap and the phase of the moon, it would run great up to the upper 5000's, then it would start mis-firing badly. No amount of tuning would correct the problem. This may not be your exact scenario, but I hope it will help you determine if it is ignition or fuel. My guess is ignition. Oh, to fix my problem, I had Tracy convert my EC-2 back to work with the old "distributor" style CAS, reinstalled the old CAS, and that corrected the probmel. It now runs great up to > 70000 rpm. Mark On Mon, Jun 20, 2011 at 11:19 PM, wrote: > > I'm going to ground my airplane until I get to the bottom of this. I can > tune it on the ground and it will run just fine all the way from idle to > full throttle. I get about 5300 rpm at full throttle at 29 in hg. MP. I have > 12 hours in the air so far but can't get past this issue. Other than this, > the plane is an absolute joy. > > When I get off the ground, when I go through around 5400 RPM, I start to > get stumbling and engine roughness. At this RPM I am about 18 inches MP. > Just below this point, I am making about 50% power and the engine will run > smoothly. > > I went to another airport and had a lot of roughness on takeoff, but I am > used to it and so continued on my way to my home airport. When I got back I > found out that someone at the other airport wanted to report me to FSDO > because he thought my engine was going to blow up, but he didn't get my tail > number. > > So, I thought I had it sorted out before I flew today, but it's back to the > drawing board. I've tried both leaning and enriching the mixture at all > throttle settings, but to no avail. At and above 5400 rpm I start getting > all sorts of roughness so I think that it has to be an ignition issue. My > injector wiring is separated from my coil wiring, but could I be getting > inductance between the different coil wiring? > > I have a 93 13 BREW normally aspirated, 2.85 RWS redrive, EM2, EC2, 88x 74 > CAtto Prop. This is getting to be really frustrating. It's got to be > something simple that I'm overlooking. I don't know anyone with an > ocilliscope, and have never used one. > > Brian Trubee > > --20cf3054a38b50449f04a637bd5c Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Brian,=A0

Your symptoms are exactly what I fought with f= or over a year with my 20B. =A0The problem turned out to be the CAS. =A0I h= ad thought it would be a big improvement to go with the Renesis type CAS, s= o I had Tracy convert my EC-2 to work with the crank mount CAS, and I added= a trigger wheel and bracket to the front of my engine. =A0Depending on the= sensor gap and the phase of the moon, it would run great up to the upper 5= 000's, then it would start mis-firing badly. =A0No amount of tuning wou= ld correct the problem. =A0This may not be your exact scenario, but I hope = it will help you determine if it is ignition or fuel. =A0My guess is igniti= on. =A0

Oh, to fix my problem, I had Tracy convert my EC-2 back= to work with the old "distributor" style CAS, reinstalled the ol= d CAS, and that corrected the probmel. =A0It now runs great up to > 7000= 0 rpm.=A0

Mark=A0


On= Mon, Jun 20, 2011 at 11:19 PM, <bktrub@aol.com> wrote:

I'm going to ground my airplane until I get to the bottom of this.= I can tune it on the ground and it will run just fine all the way from idl= e to full throttle. I get about 5300 rpm at full throttle at 29 in hg. MP. = I have 12 hours in the air so far but can't get past this issue. Other = than this, the plane is an absolute joy.
=A0
When=A0 I get off the ground, when I go through around 5400 RPM, I sta= rt to get stumbling and engine roughness. At this RPM I am about 18 inches = MP. Just below this point, I am making about 50% power and the engine will = run smoothly.
=A0
I went to another airport and had a lot of roughness on takeoff, but I= am used to it and so continued on my way to my home airport. When I got ba= ck I found out that someone at the other airport wanted to report me to FSD= O because he thought my engine was going to blow up, but he didn't get = my tail number.
=A0
So, I thought I had it sorted out before I flew today, but it's ba= ck to the drawing board. I've tried both leaning and enriching the mixt= ure at all throttle settings, but to no avail. At and above 5400 rpm I star= t getting all sorts of roughness so I think that it has to be an ignition i= ssue. My injector wiring is separated from my coil wiring, but could I be g= etting inductance between the different coil wiring?
=A0
I have a 93 13 BREW normally aspirated, 2.85 RWS redrive, EM2, EC2, 88= x 74 CAtto Prop. This is getting to be really frustrating. It's got to = be something simple that I'm overlooking. I don't know anyone with = an ocilliscope, and have never used one.
=A0
Brian Trubee

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