X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-iw0-f180.google.com ([209.85.214.180] verified) by logan.com (CommuniGate Pro SMTP 5.4c3j) with ESMTPS id 4983073 for flyrotary@lancaironline.net; Fri, 13 May 2011 18:49:15 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.214.180; envelope-from=rwstracy@gmail.com Received: by iwn6 with SMTP id 6so5267314iwn.25 for ; Fri, 13 May 2011 15:48:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:subject:references:from:content-type:x-mailer :in-reply-to:message-id:date:to:content-transfer-encoding :mime-version; bh=cnwmTdB9Cefryaji25OYQICqjfh1Hib38zq6uiOFZOE=; b=U/AdRhNK+Bd4/lzfBM58k+TrPQz7ZmhhkgnDh1VVAZU/lpqR5dQh064i9IPYaQ2Aep wP5sl9p7hSWZss7dAKs/8sXscg8eKTp/SKZUBS0MDu4O7Heq2tL6cNHuymCFxwj698dV Q2qfzEIDFQhVr04CdLRvNde6B1gY17WZ5o6gk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=subject:references:from:content-type:x-mailer:in-reply-to :message-id:date:to:content-transfer-encoding:mime-version; b=YiIiLoBdHV9SE+MDFEdwwqMcnHKjMQ8Kfo0BwGfTu9NaxHA/gxeVulf+oJkepBzOv5 mAGDDrDgCgcSshFtb3Xatx5kOZ6gnmSbMcl+zRixSI5W0mqwFEkBtYsDo4453yEXqfqW ccMSHNBHtrqpEC75p1jstfPSYU2w0qCuYNfZ8= Received: by 10.42.167.72 with SMTP id r8mr2605177icy.131.1305326920234; Fri, 13 May 2011 15:48:40 -0700 (PDT) Return-Path: Received: from [10.0.1.8] (99-197-145-127.cust.wildblue.net [99.197.145.127]) by mx.google.com with ESMTPS id y10sm1115459iba.46.2011.05.13.15.48.31 (version=TLSv1/SSLv3 cipher=OTHER); Fri, 13 May 2011 15:48:39 -0700 (PDT) Subject: Re: [FlyRotary] Engine Tuning References: From: Tracy Content-Type: multipart/alternative; boundary=Apple-Mail-2-602196310 X-Mailer: iPad Mail (8F191) In-Reply-To: Message-Id: <9E95E52D-9429-4739-9FCC-FC7759EFFA37@gmail.com> Date: Fri, 13 May 2011 18:48:15 -0400 To: Rotary motors in aircraft Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (iPad Mail 8F191) --Apple-Mail-2-602196310 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Brian, What engine are you using? 2nd gen, Renesis, etc. Tracy Sent from my iPad On May 13, 2011, at 5:35 PM, bktrub@aol.com wrote: >=20 > 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 u= p to full throttle and the engine will be smooth. But when I take off, it se= ems that as soon as I'm up a few hundred feet off the runway, I get hellacio= us backfiring at full throttle. I can mitigate it a bit by throttling back t= o about 5100 rpm, and turning the mixture knob to near full rich. It's getti= ng to be a bit nerve wracking to take off thinking I've got it smoothed out a= nd then get a series of hand grenades going off under my butt. I'm thinking t= hat I'm still running too lean up at map address 106 or so. So, I go into th= e edit page and richen up the mixture around those addresses. I think I'm cr= eeping up on smooth full throttle running. > =20 > The good news is that my coolant runs at 175 degrees and oil at less- so t= he cooling is more than effective, I just need to close up my air inlet a bi= t or restrict the outflow. > =20 > Brian Trubee --Apple-Mail-2-602196310 Content-Transfer-Encoding: 7bit Content-Type: text/html; charset=utf-8

Brian,

What engine are you using? 2nd gen, Renesis, etc.

Tracy

Sent from my iPad

On May 13, 2011, at 5:35 PM, bktrub@aol.com wrote:

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

--Apple-Mail-2-602196310--