X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-vw0-f52.google.com ([209.85.212.52] verified) by logan.com (CommuniGate Pro SMTP 5.3.6) with ESMTP id 4247491 for flyrotary@lancaironline.net; Tue, 04 May 2010 14:53:48 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.212.52; envelope-from=rwstracy@gmail.com Received: by vws15 with SMTP id 15so2644663vws.25 for ; Tue, 04 May 2010 11:53:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:sender:received :in-reply-to:references:date:x-google-sender-auth:message-id:subject :from:to:content-type; bh=fg72klu6lct3ii9USQQ6TrjvzHE9v8I7MEdArn8l8nY=; b=RJevoVGPZL52hI5jKImUqoUJz4dyiPUY62hpQE2TDGIgdncF5MaylZYLHkcoN8ogeg o5aY7wgY/X/HaQVnBJOs5atvzRvHOq34ZHCgFLZAyB8Y+dfcHPLWulMI2jKTh3I8ya4z +1VxmlQ/3I0Rc9yPIMT6i2dEqjTmd2wDv+wwk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=lv4brxvpkFPNds4AnB/cABeeXMOpvx+avyxyWQB6ELxc0UaSPq1wMCLd5a43BXgTy0 fscVewJPm2KYCCfMvRIQ2jbDY8EgS0aF3F23DZZTexl92fED/iVhLJDxXFmECluU294f BhH8ecrD3NiBoE9fu3/Pait8REMUjspe0iCjQ= MIME-Version: 1.0 Received: by 10.220.158.72 with SMTP id e8mr189141vcx.167.1272999192570; Tue, 04 May 2010 11:53:12 -0700 (PDT) Sender: rwstracy@gmail.com Received: by 10.220.170.208 with HTTP; Tue, 4 May 2010 11:53:12 -0700 (PDT) In-Reply-To: References: Date: Tue, 4 May 2010 14:53:12 -0400 X-Google-Sender-Auth: 0d1dee09ef4c0c7a Message-ID: Subject: Re: [FlyRotary] Re: tuning issues From: Tracy Crook To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=e0cb4e8875dbac2c3b0485c938aa --e0cb4e8875dbac2c3b0485c938aa Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable *I don=92t think B would be meaningful since it is so different. Do you agree? * No. Not at all. Try it. There is almost nothing you can do with the EC2/3 to make the engine miss as you describe. Besides, the fact that B has not been adjusted is a good reason TO try it. You have nothing to gai= n by NOT trying it. The first thing to try is *always* switching to the backup controller. I have talked to more than one builder who had engine anomalies bad enough that they made precautionary landings and still never tried the backup controller. I still don't understand the reluctance to throw that little switch. Tracy On Tue, May 4, 2010 at 2:30 PM, Bill Bradburry wr= ote: > None of the changes made on A during the tuning process has been > transferred to B. I don=92t think B would be meaningful since it is so > different. Do you agree? > > > > Bill B > > > ------------------------------ > > *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] *O= n > Behalf Of *Tracy Crook > *Sent:* Tuesday, May 04, 2010 1:34 PM > > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: tuning issues > > > > When something is truly random, there are no clues. You have to check > everything. What have you checked? Try the easiest things first. Flip > that little switch. Does it do the same thing on both controllers? > > > > On Tue, May 4, 2010 at 1:19 PM, Bill Bradburry > wrote: > > I don=92t think it is fuel filter related. The fuel pressure is holding > steady during this time. I think it is some kind of misfire, but have no > clue as to what could be causing it or how to go about diagnosing it. It= is > both random and intermittent and happens at various rpms. Nothing seems > consistant about it happening. > > What should I check? > > > > Bill B > > > ------------------------------ > > *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] *O= n > Behalf Of *Tracy Crook > *Sent:* Tuesday, May 04, 2010 12:53 PM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: tuning issues > > > > Anything that causes a misfire will cause the mixture to indicate lean. > Remember, it's an Oxygen sensor. If you don't burn the fuel it's got a l= ot > of that being pumped down the exhaust making the instrument think things > are Very lean.. > > Problem may not be fuel related at all. > > Tracy > > On Tue, May 4, 2010 at 11:46 AM, Bill Bradburry > wrote: > > After I get the engine running smoothly in a range, it will occasionally > hiccup. When it does, the mixture will then go down sometimes off the > scale, then come back to where it was. I have not noticed any dips in th= e > MAP table at these locations. > Any ideas, suggestions? > > Bill B > > > > -- > > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > > > > --e0cb4e8875dbac2c3b0485c938aa Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable I don=92t think B would be meaning= ful=20 since it is so different.=A0 Do you agree?

No.=A0 Not at= all.=A0=A0=A0 Try it.=A0 There is almost nothing you can do with the EC2/3= to make the engine miss as you describe.=A0 Besides,=A0=A0 the fact that B= has not been adjusted is a good reason TO try it.=A0=A0 You have nothing t= o gain by NOT trying it.

The first thing to try is always switching to the backup control= ler.=A0
I have talked to more than one builder who had engine anomalies= bad enough that they made precautionary landings and still never tried the= backup controller.=A0 I still don't understand the reluctance to throw= that little switch.

Tracy

On Tue, May 4, 2010 at 2:30 PM,= Bill Bradburry <bbradburry@bellsouth.net> wrote:

None of the ch= anges made on A during the tuning process has been transferred to B.=A0 I don=92t think B would be mea= ningful since it is so different.=A0 Do you agree?

=A0

Bill B<= /font>

=A0

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Crook Sent: Tuesday, May 04, 201= 0 1:34 PM


To: Rotary motors in aircraft
Subject: [FlyRotary] Re: t= uning issues

=A0

When something is tru= ly random, there are no clues.=A0 You have to check everything.=A0 What have you checked?=A0 Try the easiest things first.=A0 Flip that little switch. =A0 Does it do the same thing on both controllers?

=A0

On Tue, May 4, 2010 at 1:19 PM, Bill Bradburry <<= a href=3D"mailto:bbradburry@bellsouth.net" target=3D"_blank">bbradburry@bel= lsouth.net> wrote:

I don=92t thin= k it is fuel filter related.=A0 The fuel pressure is holding steady during this time.=A0 I think it is some kind of misfire, but have no clue as to what could be causing it or how to go about diagnosing it.=A0 It is both random and intermittent and happens at various rpms.=A0 Nothing seems consistant about it happening.

What should I = check?

=A0

Bill B<= /font>

=A0

From: Rotary motors in aircraft [mailto:fl= yrotary@lancaironline.net] On Behalf Of Tracy Crook Sent: Tuesday, May 04, 201= 0 12:53 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: t= uning issues

=A0

Anything that causes a misfire will cause the mixture to indicate lean.=A0 Remember, it&#= 39;s an Oxygen sensor.=A0 If you don't burn the fuel it's got a lot of t= hat being pumped down the exhaust=A0 making the instrument think things are Very lean..=A0

Problem may not be fuel related at all.

Tracy

On Tue, May 4, 2010 at 11:46 AM, Bill Bradburry <bbradburry@bellsouth.net> wrote:

After I get the engine running smoothly in a range, it will occasionally
hiccup. =A0When it does, the mixture will then go down sometimes off the scale, then come back to where it was. =A0I have not noticed any dips in th= e
MAP table at these locations.
Any ideas, suggestions?

Bill B

=A0

=A0


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