X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost05.isp.att.net ([204.127.217.105] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with ESMTP id 2713909 for flyrotary@lancaironline.net; Sun, 03 Feb 2008 22:54:15 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.217.105; envelope-from=keltro@att.net Received: from fwebmail08.isp.att.net ([204.127.218.108]) by isp.att.net (frfwmhc05) with SMTP id <20080204035336H0500d2n1te>; Mon, 4 Feb 2008 03:53:36 +0000 X-Originating-IP: [204.127.218.108] Received: from [4.245.48.252] by fwebmail08.isp.att.net; Mon, 04 Feb 2008 03:53:35 +0000 From: "Kelly Troyer" To: "Rotary motors in aircraft" Subject: Renesis sensor wiring change Date: Mon, 04 Feb 2008 03:53:35 +0000 Message-Id: <020420080353.26641.47A68C3F00064C8C0000681122230703729B0A02D29B9B0EBF019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Oct 30 2007) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_26641_1202097215_0" --NextPart_Webmail_9m3u9jl4l_26641_1202097215_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Tracy, I am using the 93-95 RX7 CAS and Renesis timing wheel on my unfired installation.........Any problems with this setup or am I the only one using it ?? -- Kelly Troyer "Dyke Delta"_13B ROTARY Engine "RWS"_RD1C/EC2/EM2 "Mistral"_Backplate/Oil Manifold -------------- Original message from "Tracy Crook" : -------------- I did the 9.7 CR rotors in mine but have never done a front to back comparison with the stock 9.0s. It does run strong with the 9.7s though! BTW, all builders using the Renesis Crank sensors take note: I had a lot of trouble starting my 20B with Renesis CAS installed. Just yesterday I found out why. The Renesis CAS is a much higher impedance sensor than the RX-7 CAS and this makes it much more sensitive to noise pickup, especially when the starter is running. It needs a load resistor across it to avoid this problem. Install a 1000 ohm (1/4 or 1/2 watt is fine) across the leads of the sensor either at the sensor or near the EC2. After installing one on mine it went from very difficult to instant starting. I'm not sure why I have not seen this problem on my RV-4 with Renesis engine but one other Renesis user has seen the problem and the resistor fixed it immediately. Mark S., you should definitely do this on your 20B / Renesis setup as well. I am starting to suspect that this is why your earlier steel mount (for CAS) did not work. A very small difference in how the CAS is mounted affects the noise characteristics a lot. Either mount would probably have worked fine with the resistor installed. Future EC2s for Renesis engines will have this installed internally. Tracy --NextPart_Webmail_9m3u9jl4l_26641_1202097215_0 Content-Type: text/html Content-Transfer-Encoding: 8bit
Tracy,
   I am using the 93-95 RX7 CAS and Renesis timing wheel
on my unfired installation.........Any problems with this setup
or am I the only one using it ??
--
Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold




-------------- Original message from "Tracy Crook" <tracy@rotaryaviation.com>: --------------

I did the 9.7 CR rotors in mine but have never done a front to back comparison with the stock 9.0s.  It does run strong with the 9.7s though!
 
BTW, all builders using the Renesis Crank sensors take note:
 
I had a lot of trouble starting my 20B with Renesis CAS installed.  Just yesterday I found out why.  The Renesis CAS is a much higher impedance sensor than the RX-7 CAS and this makes it much more sensitive to noise pickup, especially when the starter is running.  It needs a load resistor across it to avoid this problem.  Install a 1000 ohm (1/4  or 1/2 watt is fine)  across the leads of the sensor either at the sensor or near the EC2. 
 
After installing one on mine it went from very difficult to instant starting. 
 
I'm not sure why I have not seen this problem on my RV-4 with Renesis engine but one other Renesis user has seen the problem and the resistor fixed it immediately.
 
Mark S., you should definitely do this on your 20B / Renesis setup as well.  I am starting to suspect that this is why your earlier steel mount (for CAS) did not work.  A very small difference in how the CAS is mounted affects the noise characteristics a lot.  Either mount would probably have worked fine with the resistor installed.  
 
Future EC2s for Renesis engines will have this installed internally.
 
Tracy
 
 
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