X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from qmta13.emeryville.ca.mail.comcast.net ([76.96.27.243] verified) by logan.com (CommuniGate Pro SMTP 6.0.6) with ESMTP id 6442767 for flyrotary@lancaironline.net; Tue, 27 Aug 2013 00:02:17 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.27.243; envelope-from=hoursaway1@comcast.net Received: from omta01.emeryville.ca.mail.comcast.net ([76.96.30.11]) by qmta13.emeryville.ca.mail.comcast.net with comcast id Hfzt1m0010EPchoADg1iti; Tue, 27 Aug 2013 04:01:42 +0000 Received: from sz0081.ev.mail.comcast.net ([76.96.40.137]) by omta01.emeryville.ca.mail.comcast.net with comcast id Hg1h1m00L2xZMJ48Mg1hqV; Tue, 27 Aug 2013 04:01:41 +0000 Date: Tue, 27 Aug 2013 04:01:41 +0000 (UTC) From: hoursaway1@comcast.net To: Rotary motors in aircraft Message-ID: <1127310070.2596931.1377576101159.JavaMail.root@sz0081a.emeryville.ca.mail.comcast.net> In-Reply-To: Subject: Re: [FlyRotary] Re: Fuel map scrambled. MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_2596930_502982266.1377576101158" X-Originating-IP: [::ffff:68.40.10.159] X-Mailer: Zimbra 6.0.13_GA_2944 (ZimbraWebClient - FF3.0 (Win)/6.0.13_GA_2944) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20121106; t=1377576102; bh=61vbbSMO1jsNLRBSKlryLRGRz34+jw1mPIbB3X196Lw=; h=Received:Received:Date:From:To:Message-ID:Subject:MIME-Version: Content-Type; b=d7BdwxYNHa4IvyVJsTp7kIBpgW1SXpOJ7wyMun7kl12lg/Y8R6HAcWbvXbRg0cl7h CGWcaiFYqjPRmJtOPBqAtWIneCIC0xZbuP7AzNpOVH5QAGW9DVKuOdsO3zIa7mdyBT Z/rpgwLqS5nFP1HIC9q7Er8MU+fEAoQ1wt522fB2aRb6kEUO6R/xmhJ7tFiGbLSnik g3XHlB0bWzom8zgmdp+vD5ngYtXcWah37IAWHeFmlsVuEj3++Yqykge2SoqGRT9fke 4LWB6DqSwJl4xOufxPYCLyvE5H950y4g/nhD//actiUGsaZN1P6SR9nxEQ8m0Tn2E0 s/rg6Gj1OgmSA== ------=_Part_2596930_502982266.1377576101158 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit The thing is Lynn, I had not changed any switches in at least 15+ min. of flight, did not even move the mixture knob, I have manual flaps, fixed landing gear & did not change the prop yet, that is what that flight was going to be for testing full cruise pitch speeds. I have my complete schematic of the aircraft drawn out on a large poster board & will go through to look for ideas with Tracy's new info & guidelines. David ----- Original Message ----- From: Lehanover@aol.com To: "Rotary motors in aircraft" Sent: Thursday, August 22, 2013 10:33:36 PM Subject: [FlyRotary] Re: Fuel map scrambled. A review of switching systems is in order. Not only will the inductive load of the solenoid primary generate destructive voltages, as in a Kettering style field collapse, also the contactors in the solenoids can provide a dirty arcing when opening. Common switches as well may produce an electrically noisy opening. In modern electronics time periods, the operation of a common switch looks like a week long electrical storm. Diodes and capacitors across the contacts are used to silence such noise. Lynn E. Hanover In a message dated 8/22/2013 6:47:37 P.M. Eastern Daylight Time, hoursaway1@comcast.net writes: Bobby, my map is ( was ) still set to factory with all bars in the center, after landing I thought to check EM2 screen with mapping bars & discovered half were still at center & half were all the way to the bottom/lean. I had not changed anything for aprox. 15 min. of flight, then suddenly ruff running. I just responded to Mark & mentioned that the only thing diff. from prev. 10 hrs. was I had both landing & taxi lights on this flight. David ------=_Part_2596930_502982266.1377576101158 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit
The thing is Lynn,  I had not changed any switches in at least 15+ min. of flight, did not even move the mixture knob, I have manual flaps, fixed landing gear & did not change the prop yet, that is what that flight was going to be for testing full cruise pitch speeds.  I have my complete schematic of the aircraft drawn out on a large poster board & will go through to look for ideas with Tracy's new info & guidelines.   David

From: Lehanover@aol.com
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Thursday, August 22, 2013 10:33:36 PM
Subject: [FlyRotary] Re: Fuel map scrambled.

A review of switching systems is in order. Not only will the inductive load of the solenoid primary generate destructive voltages, as in a Kettering style field collapse, also the contactors in the solenoids can provide a dirty arcing when opening. Common switches as well may produce an electrically noisy opening. In modern electronics time periods, the operation of a common switch looks like a week long electrical storm. Diodes and capacitors across the contacts are used to silence such noise.
 
Lynn E. Hanover
 
In a message dated 8/22/2013 6:47:37 P.M. Eastern Daylight Time, hoursaway1@comcast.net writes:
Bobby, my map is ( was ) still set to factory with all bars in the center, after landing I thought to check EM2 screen with mapping bars & discovered half were still at center & half were all the way to the bottom/lean.  I had not changed anything for aprox. 15 min. of flight, then suddenly ruff running.  I just responded to Mark & mentioned that the only thing diff. from prev. 10 hrs. was I had both landing & taxi lights on this flight.  David
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