X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost02.isp.att.net ([204.127.217.102] verified) by logan.com (CommuniGate Pro SMTP 5.3.6) with ESMTP id 4247950 for flyrotary@lancaironline.net; Tue, 04 May 2010 21:47:32 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.217.102; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-85-113-131.mco.bellsouth.net[98.85.113.131]) by isp.att.net (frfwmhc02) with SMTP id <20100505014655H0200i5dl2e>; Wed, 5 May 2010 01:46:55 +0000 X-Originating-IP: [98.85.113.131] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Re: tuning issues Date: Tue, 4 May 2010 21:47:05 -0400 Message-ID: <14DC46A4DD7A46C4BFB8F9A1DD80B5EA@Desktop> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000F_01CAEBD3.56AB1580" X-Mailer: Microsoft Office Outlook 11 Thread-Index: Acrr8SVdO2Eo6dwwS4GEu2qjxoP7KAAAksew X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 This is a multi-part message in MIME format. ------=_NextPart_000_000F_01CAEBD3.56AB1580 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit In order to reduce pulses in the manifold pressure sense lines, I have done the following: There are two manifold pressure outlets in the rear of the intake manifold plenum. One of these is attached to a 5/16 hose and "T"s to the fuel pressure regulator and then continues to join with the other hose described next. The other manifold pressure outlet is attached to a 5/16 hose and takes a different route but ends up "T"ed into the first hose just prior to the EC-2. These two hoses join and go thru a single fuel filter. (the idea is that the filter will dampen out any pulses.) After the filter, they separate at a "T" and then go to the two pressure inlets on the EC-2. My idle seems fine at about 1500 rpm Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of shipchief@aol.com Sent: Tuesday, May 04, 2010 9:15 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: tuning issues Bill; I had some trouble with my manifold pressure sense lines. In my case, they picked up oil from the bottom of the intake plenum (before I put a restrictor in the turbo oil supply line) So the lines went downhill to the EC-2, causing a change in static pressure and probably dampened the response. Dynamic pulsations in the manifold where the sense line connects could confuse the controller as well? I installed small tubes inside my plenum to sense pressure from the center of the cavity, and may make an oil trap at the low point if the problem persists, but I also might install a restrictor, as I have a ragged idle. Or it could be me, as I have very little ground running time yet. -----Original Message----- From: Bill Bradburry To: Rotary motors in aircraft Sent: Tue, May 4, 2010 11:42 am Subject: [FlyRotary] Re: tuning issues I am using the Iridium plugs now. I will check the crank angle sensor, Ernest, but seems to me it is mounted on a casting on the Renesis. I could be wrong. I will have to look. Bill B _____ From: Rotary motors in aircraft [ mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle Sent: Tuesday, May 04, 2010 2:37 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: tuning issues Bill, I cured an intermittent mis-fire on my 20B by switching to the Iridium plugs, same as those used in the Renesis engines. Mark S. On Tue, May 4, 2010 at 1:25 PM, Ernest Christley < echristley@nc.rr.com> wrote: Bill Bradburry wrote: I don't 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 How is your crank-angle sensor mounted? Could it be loose? Could the wire be frayed? -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html ------=_NextPart_000_000F_01CAEBD3.56AB1580 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

In order to reduce pulses in the = manifold pressure sense lines, I have done the = following:

There are two manifold pressure = outlets in the rear of the intake manifold plenum.  One of these is attached = to a 5/16 hose and “T”s to the fuel pressure regulator and then continues to join with the other hose described = next.

The other manifold pressure outlet = is attached to a 5/16 hose and takes a different route but ends up = “T”ed into the first hose just prior to the EC-2.  These two hoses join = and go thru a single fuel filter.  (the idea is that the filter will = dampen out any pulses.)

After the filter, they separate at = a “T” and then go to the two pressure inlets on the = EC-2.

 

My idle seems fine at about 1500 = rpm

 

Bill B =

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of shipchief@aol.com
Sent: Tuesday, May 04, = 2010 9:15 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = tuning issues

 

Bill;

I had some trouble with my = manifold pressure sense lines. In my case, they picked up oil from the bottom of = the intake plenum (before I put a restrictor in the turbo oil supply line) = So the lines went downhill to the EC-2, causing a change in static pressure and probably dampened the response.

Dynamic pulsations in the manifold = where the sense line connects could confuse the controller as well? =

I installed small tubes inside my plenum to sense pressure from the center = of the cavity, and may make an oil trap at the low point if the problem = persists, but I also might install a restrictor, as I have a ragged idle. Or it could = be me, as I have very little ground running time = yet.

 

-----Original Message-----
From: Bill Bradburry <bbradburry@bellsouth.net>
To: Rotary motors in = aircraft <flyrotary@lancaironline.net>
Sent: Tue, May 4, 2010 11:42 am
Subject: [FlyRotary] Re: tuning issues

I am using the Iridium plugs = now. 

I will check the crank angle = sensor, Ernest, but seems to me it is mounted on a casting on the Renesis.  = I could be wrong.  I will have to look.

 

Bill B

 

From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net= ] On Behalf Of Mark Steitle
Sent: Tuesday, May 04, = 2010 2:37 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = tuning issues

 

Bill, 

 

I cured an intermittent mis-fire = on my 20B by switching to the Iridium plugs, same as those used in the Renesis = engines.

 

Mark S.  

On Tue, May 4, 2010 at 1:25 PM, = Ernest Christley <echristley@nc.rr.com> = wrote:

Bill Bradburry = wrote:


I don’t 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

How is your crank-angle sensor = mounted? Could it be loose? Could the wire be frayed?


--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/Lis= t.html

 

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