X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from wx-out-0506.google.com ([66.249.82.232] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with ESMTP id 2714289 for flyrotary@lancaironline.net; Mon, 04 Feb 2008 07:28:33 -0500 Received-SPF: pass receiver=logan.com; client-ip=66.249.82.232; envelope-from=rwstracy@gmail.com Received: by wx-out-0506.google.com with SMTP id i27so1901707wxd.25 for ; Mon, 04 Feb 2008 04:27:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:sender:to:subject:in-reply-to:mime-version:content-type:references:x-google-sender-auth; bh=A0koswLjIvRtoTZ9kCXF0zRGJ9lOL1v6PKdxHXS2beM=; b=YaNuQFsKyJTNDOfWE/tYwx53HM9h7FHxY5vV+CY7lFgibZInRhGLd0nL7hrmBGe5h8Yc1af8ufRhOMvJCvJ2RfdxhitQ6Bvp9skfgogC8Fisd0E8LsV+qTU8doHTVJ2kw1VfhvZcSgEzCnWLWZ4h4LlzaGfI6L4lwfRUDsjLSvo= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:sender:to:subject:in-reply-to:mime-version:content-type:references:x-google-sender-auth; b=dXqMxJ7JiYDkYuao2EvBXrM9HWfpSCjNN4ZJagtiBxfL5CZAWBs+PbzAgr73yDEiwV6Ux+TIVJwB0k4kICFQtqBJ7at4wx0IY1UgeP6RQLn/DHEaEJfzfmUJCJEpwDKEAd4udTp76SPTGGqL6KZsDeCekMnAuzhI0dkYpCRKF7I= Received: by 10.142.97.20 with SMTP id u20mr3347565wfb.203.1202128071213; Mon, 04 Feb 2008 04:27:51 -0800 (PST) Received: by 10.143.125.5 with HTTP; Mon, 4 Feb 2008 04:27:51 -0800 (PST) Message-ID: <1b4b137c0802040427k7ca7e7f3g33dcd9bf1be1ac7b@mail.gmail.com> Date: Mon, 4 Feb 2008 07:27:51 -0500 From: "Tracy Crook" Sender: rwstracy@gmail.com To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Renesis sensor wiring change In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_21438_105909.1202128071184" References: X-Google-Sender-Auth: 8d1672567c01a850 ------=_Part_21438_105909.1202128071184 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Good question Kelly. You are one of the few using the 3rd gen sensor. I have not evaluated them but they do look very similar to the Renesis sensor so may have similar characteristics. In any case, putting the 1000 ohm resistor across it will not hurt anything (this includes the 2nd gen sensor as well) so I would say it's a good idea to install them on any installation. You will need to do this on both sensors since the 2nd & 3rd gen engines use 2 sensors. I will be installing them internally on all EC2s from now on. Tracy On Feb 3, 2008 10:53 PM, Kelly Troyer wrote: > 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 > > > > ------=_Part_21438_105909.1202128071184 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline
Good question Kelly.
  You are one of the few using the 3rd gen sensor.  I have not evaluated them but they do look very similar to the Renesis sensor so may have similar characteristics.  In any case, putting the 1000 ohm resistor across it will not hurt anything (this includes the 2nd gen sensor as well) so I would say it's a good idea to install them on any installation.  You will need to do this on both sensors since the 2nd & 3rd gen engines use 2 sensors. I will be installing them internally on all EC2s from now on. 
 
Tracy

On Feb 3, 2008 10:53 PM, Kelly Troyer <keltro@att.net> wrote:
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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