X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [64.233.178.246] (HELO hs-out-2122.google.com) by logan.com (CommuniGate Pro SMTP 5.2c4) with ESMTP id 2629009 for flyrotary@lancaironline.net; Thu, 03 Jan 2008 06:35:40 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.233.178.246; envelope-from=msteitle@gmail.com Received: by hs-out-2122.google.com with SMTP id k27so4558039hsc.3 for ; Thu, 03 Jan 2008 03:35:00 -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:to:subject:in-reply-to:mime-version:content-type:references; bh=3hZlhwVF8QZmiH2oiMYUILtpK1w+AFVnELoyU1ZuF8Q=; b=TCNI1LD3nm5kTzx+hoe/3W5C8fuEnmf6jk6rKSKCoHAyJ6NV3GzCR9vDQ3rPwpHw8rzus1VRfPrxJAswPrU1I4nO9hU3lfNEanTBveNoK6La+pqlgU3N83q26MJL/+PnJnwVT6WTvR96ZluOPakfl/b/JKMmxh20oOFHCXfYRng= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=o88Jqzn2VTE7l3IiaHD4fwA3VnfftB9L2KXDl5PkhbbbV4GRtZ5jfLkz6ozcX8YWJk4HO/Hq2oNVxFSORlUSiD/1TZSxNH+wC0bymmYnCnZ+YDi+Xdrkq2iMvfd3R+SJWHgsvuPyDtCA132Yg0N1Ql4+QkkO4yM22AOuA6HFANA= Received: by 10.150.202.17 with SMTP id z17mr2147090ybf.70.1199360100621; Thu, 03 Jan 2008 03:35:00 -0800 (PST) Received: by 10.150.146.16 with HTTP; Thu, 3 Jan 2008 03:35:00 -0800 (PST) Message-ID: <5cf132c0801030335w4c6bb5efj6a8a1ff8f80300b@mail.gmail.com> Date: Thu, 3 Jan 2008 05:35:00 -0600 From: "Mark Steitle" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] flooding In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_14156_31328261.1199360100603" References: ------=_Part_14156_31328261.1199360100603 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Don, Sounds like you might be on to something with the CAS gap being too wide. Are you sure you have the correct CAS sensor? I would check that first before grinding the mount down. Also, is it possible that the CAS mount got bent in shipment? I'm with you in that I don't understand how the gap could be so large. My 20B flat would not fire at all with a gap of .035 or larger. Even with a gap of .030, it would start but not run at higher rpm. The CAS gap is pretty sensitive, at least in my case. Good luck, Mark On Jan 13, 2008 9:17 PM, Don Wallker wrote: > I made it out to the airport today, soldered up the CAS and installed > it. Before I cranked it over, I put it in mode 8 and fired it off. The > usual nice blue sparks. Then set it to mode 0 and cranked with the plugs > out and pumps/inj off. No spark. Cranked and looked again. Every so often > there would be a weak spark or 3, but most of the time, nothing. So little > or no spark. I measured the gap between the CAS and the wheel and I get > between .045 and .050 (I don't have the right feeler gauges). This > contrasts with Mark having to move his CAS to .020 to make it work. The > flange that the CAS sets on is part of the cast casing and is machined flat > where the CAS is bolted in. It looks like this sould be the correct setting > and would never have concidered this to be the problem (still don't know for > sure if it is) if Mark hadn't mentioned it. Have any of you Renesis people > run into this? Some possibilities are that it needs a smaller gap for the > EC-2. or that this being a "grey market" engine, they let the builder figure > it out the spacing. It could be something else, but my plan is to grind the > flange down to a gap of .020 and try it. It will be a bitch to get to. I > can add spacers if I need to move it back out. Anyone else have any > suggestions as what else might be the problem? Bill, Tracy and Dennis, did > you have this problem with spacing on the Renesis, or did you just install > the stock CAS and go? I checked the factory Manual on CD and they have no > specs on the gap. BTW no RPM display at these low cranking speeds. Lynn, I > am running a stock 13b autotrans starter. It cranks well, until the battery > runs down. Yes, I have my 12 lb Catto prop installed. I put a little oil > into the plugs holes before cranking. > Dennis, I'll put that inverted drain valve at the top of the radiator > housing this weekend. I also have 2 air purge lines, one running from the > rear top of the engine and the other from the radiator, radiator cap, both > going up to the surge tank to purge air out of the system. Bob, I think > your harnesses are fine! Picked up some Marvel MM oil for squirting into > the plug holes. Bill, I have been cleaning my plugs with carb cleaner, then > blowing them dry. If that doesn't work, I'll use the rice hulls. I will > attempt to fire it off once the urathane sets and I get the flange cut > down. Guys, thanks for all the suggestions! I'll keep you posted. > > Don Walker > ------=_Part_14156_31328261.1199360100603 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Don,

Sounds like you might be on to something with the CAS gap being too wide.  Are you sure you have the correct CAS sensor?  I would check that first before grinding the mount down.  Also, is it possible that the CAS mount got bent in shipment?  I'm with you in that I don't understand how the gap could be so large.  My 20B flat would not fire at all with a gap of .035 or larger.   Even with a gap of .030, it would start but not run at higher rpm.  The CAS gap is pretty sensitive, at least in my case.

Good luck,
Mark


On Jan 13, 2008 9:17 PM, Don Wallker <drwalker@gbis.com> wrote:
I made it out to the airport today, soldered up the CAS and installed it.  Before I cranked it over, I put it in mode 8 and fired it off.  The usual nice blue sparks.  Then set it to mode 0 and cranked with the plugs out and pumps/inj off.  No spark.  Cranked and looked again.  Every so often there would be a weak spark or 3, but most of the time, nothing.  So little or no spark.  I measured the gap between the CAS and the wheel and I get between .045 and .050  (I don't have the right feeler gauges).  This contrasts with Mark having to move his CAS to .020  to make it work.  The flange that the CAS sets on is part of the cast casing and is machined flat where the CAS is bolted in.  It looks like this sould be the correct setting and would never have concidered this to be the problem (still don't know for sure if it is) if Mark hadn't mentioned it.  Have any of you Renesis people run into this?  Some possibilities are that it needs a smaller gap for the EC-2. or that this being a "grey market" engine, they let the builder figure it out the spacing.  It could be something else, but my plan is to grind the flange down to a gap of .020 and try it.  It will be a bitch to get to.  I can add spacers if I need to move it back out.  Anyone else have any suggestions as what else might be the problem?  Bill, Tracy and Dennis, did you have this problem with spacing on the Renesis, or did you just install the stock CAS and go?  I checked the factory Manual on CD and they have no specs on the gap.  BTW no RPM display at these low cranking speeds.  Lynn, I am running a stock 13b autotrans starter.  It cranks well, until the battery runs down.  Yes, I have my 12 lb Catto prop installed.  I put a little oil into the plugs holes before cranking. 
Dennis, I'll put that inverted drain valve at the top of the radiator housing this weekend.  I also have 2 air purge lines, one running from the rear top of the engine and the other from the radiator, radiator cap, both going up to the surge tank to purge air out of the system.  Bob, I think your harnesses are fine!  Picked up some Marvel MM oil for squirting into the plug holes.  Bill, I have been cleaning my plugs with carb cleaner, then blowing them dry.  If that doesn't work, I'll use the rice hulls. I will attempt to fire it off once the urathane sets and I get the flange cut down.  Guys, thanks for all the suggestions!  I'll keep you posted.
 
Don Walker

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