X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 10 [X] Return-Path: Received: from an-out-0708.google.com ([209.85.132.242] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 2040136 for flyrotary@lancaironline.net; Sat, 12 May 2007 15:49:57 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.132.242; envelope-from=rotary.thjakits@gmail.com Received: by an-out-0708.google.com with SMTP id b6so398260ana for ; Sat, 12 May 2007 12:49:19 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=p9B7j56vwS7dd1dx2NLeQlSLegcpujVfSqqaq56NoPvdOJphGS3+31UwLDieUDj+7GMkS93sFThRT32WFoo4WEgA8IsB7n7Q+cjTUBS0C+ViUR/suAHTy1bSk92epjDRdB4qpDlmaMJ/tASdANLLPF9HfTBWy/LBIAzqYqRLMPs= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=JcYUNm/dg+i9icR8glaIytnWvJkM4kujTNyXEecSyDa1Xmx/KC1rH2Zk5aOc+XrlObydTwdDsnfM7du4SEDbBpe5JGKVwY4cBh2+0y7a4bgEIk4ZKW1GHnil/5gGdiojQYL0/FqjzZDLtixGHYf2BdiYnoMOGONZz9hY8b5urRI= Received: by 10.100.14.19 with SMTP id 19mr3273070ann.1178999359384; Sat, 12 May 2007 12:49:19 -0700 (PDT) Received: by 10.100.96.15 with HTTP; Sat, 12 May 2007 12:49:19 -0700 (PDT) Message-ID: <63163d560705121249y12d61bfakc945f5ca56952cc2@mail.gmail.com> Date: Sat, 12 May 2007 14:49:19 -0500 From: "Thomas Jakits" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: EC2 smoke question In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_35475_5554027.1178999359136" References: ------=_Part_35475_5554027.1178999359136 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline Hi Tracy, thanx for screening the smoke! I already thought so (you wouldn't be selling, if your product would not work....). Just wanted the scope on the smoke-machine, it is always entertaining at the least, but mostly also very educational - technically and human relations wise:) As far as his slide-throttle p-port goes: P-port should not be a hindrance to install a manifold-plenum or is there something I don't see?? TJ > > Hi TJ, > > Smoke is very hard to clear up. Visibility here in Fla was less than 1/4 > mile all day. I thought it was the fires in Georgia & N. Florida but it is > possible that it was from a certain Email list purveyor in California :-0 > > Seriously, the C/S prop story about not being compatible with the EC2 is > just that - Smoke. The engine load is accurately reflected by Manifold > pressure and RPM. These are the primary inputs to the EC2 so it has no > problem tracking the variations caused by a CS prop. I don't have the time > to elaborate but it is actually harder to match the fuel requirements of a > fixed pitch prop in most circumstances. The changes in volumetric > efficiency due to rpm change are eliminated with a CS prop. > > The full story about the "Dyno incompatibility" is a longer one which I > will abbreviate out of necessity. > > It started with Paul's trip to Mazdatrix to test Mark Supenski's P Port > engine with his beloved slide throttle (which had never run before). As it > happens, there is no manifold on an engine in this configuration so it is > difficult to measure manifold pressure. Where are you going to get manifold > pressure from? (did I mention that manifold pressure was a primary input to > the EC2?) To make matters worse, Paul was so confident in his abilities to > make anything work (even an EFI system that he had zero experience > with) that he didn't bother to take the EC2 instructions with him to > Mazdatrix. Given these circumstances, it was no surprise that the dyno > run was a dismal failure. Dave at Mazdatrix yanked everything off the > engine, put a webber carb and manifold on it and got it running in order to > get a pull on the dyno. > > And so the story of how the EC2 will not run on a Dyno (and by extension, > with a CS prop) was born. > > Tracy > ------=_Part_35475_5554027.1178999359136 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline
Hi Tracy,
 
thanx for screening the smoke!
I already thought so (you wouldn't be selling, if your product would not work....).
Just wanted the scope on the smoke-machine, it is always entertaining at the least, but mostly also very educational - technically and human relations wise:)
 
As far as his slide-throttle p-port goes:
 
P-port should not be a hindrance to install a manifold-plenum or is there something I don't see??
 
TJ

 
 
Hi TJ,
 
Smoke is very hard to clear up.   Visibility here in Fla was less than 1/4 mile all day.  I thought it was the fires in Georgia & N. Florida but it is possible that it was from a certain Email list purveyor in California :-0
 
Seriously, the C/S prop story about not being compatible with the EC2 is just that - Smoke.   The engine load is accurately reflected by Manifold pressure and RPM.  These are the primary inputs to the EC2 so it has no problem tracking the variations caused by a CS prop.  I don't have the time to elaborate but it is actually harder to match the fuel requirements of a fixed pitch prop in most circumstances.  The changes in volumetric efficiency due to rpm change are eliminated with a CS prop.
 
The full story about the "Dyno incompatibility" is a longer one which I will abbreviate out of necessity.
 
 It started with Paul's trip to Mazdatrix to test Mark Supenski's P Port engine with his beloved slide throttle (which had never run before).   As it happens, there is no manifold on an engine in this configuration so it is difficult to measure manifold pressure.  Where are you going to get manifold pressure from?  (did I mention that manifold pressure was a primary input to the EC2?)  To make matters worse, Paul was so confident in his abilities to make anything work (even an EFI system that he had zero experience with) that he didn't bother to take the EC2 instructions with him to Mazdatrix.    Given these circumstances, it was no surprise that the dyno run was a dismal failure.  Dave at Mazdatrix yanked everything off the engine, put a webber carb and manifold on it and got it running in order to get a pull on the dyno.
 
And so the story of how the EC2 will not run on a Dyno (and by extension, with a CS prop) was born. 
 
Tracy
------=_Part_35475_5554027.1178999359136--