X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost04.isp.att.net ([204.127.217.104] verified) by logan.com (CommuniGate Pro SMTP 5.4c3j) with ESMTP id 4983070 for flyrotary@lancaironline.net; Fri, 13 May 2011 19:03:53 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.217.104; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-98-85-145-79.mco.bellsouth.net[98.85.145.79]) by isp.att.net (frfwmhc04) with SMTP id <20110513230318H04001556ee>; Fri, 13 May 2011 23:03:18 +0000 X-Originating-IP: [98.85.145.79] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Engine Tuning Date: Fri, 13 May 2011 19:03:21 -0400 Message-ID: <4940DC41DEA44A8783793F82ABD99CE0@Desktop> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0031_01CC11A0.6D9F2E90" X-Mailer: Microsoft Office Outlook 11 Thread-Index: AcwRtb1T56EEOKtCStG9yRvVDbzwaQADBZhg X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 This is a multi-part message in MIME format. ------=_NextPart_000_0031_01CC11A0.6D9F2E90 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Brian, What is the OAT when you are running at 175? Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of bktrub@aol.com Sent: Friday, May 13, 2011 5:35 PM To: Rotary motors in aircraft Subject: [FlyRotary] Engine Tuning Since the weather has been cooperating lately, I've had the opportunity to put a few more hours on the airplane. On the ground, I can go from an idle up to full throttle and the engine will be smooth. But when I take off, it seems that as soon as I'm up a few hundred feet off the runway, I get hellacious backfiring at full throttle. I can mitigate it a bit by throttling back to about 5100 rpm, and turning the mixture knob to near full rich. It's getting to be a bit nerve wracking to take off thinking I've got it smoothed out and then get a series of hand grenades going off under my butt. I'm thinking that I'm still running too lean up at map address 106 or so. So, I go into the edit page and richen up the mixture around those addresses. I think I'm creeping up on smooth full throttle running. The good news is that my coolant runs at 175 degrees and oil at less- so the cooling is more than effective, I just need to close up my air inlet a bit or restrict the outflow. Brian Trubee ------=_NextPart_000_0031_01CC11A0.6D9F2E90 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Brian,

 

What is the OAT when you are = running at 175?

 

Bill B

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of bktrub@aol.com
Sent: Friday, May 13, = 2011 5:35 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] = Engine Tuning

 


Since the weather has been cooperating lately, I've had the opportunity = to put a few more hours on the airplane. On the ground, I can go from an idle = up to full throttle and the engine will be smooth. But when I take off, it = seems that as soon as I'm up a few hundred feet off the runway, I get hellacious backfiring at full throttle. I can mitigate it a bit by throttling back = to about 5100 rpm, and turning the mixture knob to near full rich. It's = getting to be a bit nerve wracking to take off thinking I've got it smoothed out = and then get a series of hand grenades going off under my butt. I'm thinking that = I'm still running too lean up at map address 106 or so. So, I go into the = edit page and richen up the mixture around those addresses. I think I'm creeping = up on smooth full throttle running.

 

=

The good news is that my coolant = runs at 175 degrees and oil at less- so the cooling is more than effective, I = just need to close up my air inlet a bit or restrict the = outflow.

 

=

Brian = Trubee

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