X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-lpp01m010-f52.google.com ([209.85.215.52] verified) by logan.com (CommuniGate Pro SMTP 5.4.3) with ESMTPS id 5358360 for flyrotary@lancaironline.net; Fri, 20 Jan 2012 18:28:01 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.215.52; envelope-from=rwstracy@gmail.com Received: by lahd3 with SMTP id d3so526478lah.25 for ; Fri, 20 Jan 2012 15:27:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=fkTU568T1FlMEqYUoJ23Ijn4m+IG3I56yhP5JgS3sig=; b=H04LYYk486gU91vC1Khbvnm0wOsWIrRl+r/fYXmDN3nhAD74ptIspRRJeptAXiC9w3 Y5KRWLlPQ/JH7WtoIGhvUhcOUDhShnT4mkO2OI9bqMVpdOngJOEyVttXWKMYMAdCjpwk K+cm2PEzD2RuY7umJZ52nN7hUHwLFGBqIAv70= MIME-Version: 1.0 Received: by 10.112.84.137 with SMTP id z9mr7819702lby.51.1327102043032; Fri, 20 Jan 2012 15:27:23 -0800 (PST) Received: by 10.112.75.198 with HTTP; Fri, 20 Jan 2012 15:27:23 -0800 (PST) In-Reply-To: References: Date: Fri, 20 Jan 2012 18:27:23 -0500 Message-ID: Subject: Re: [FlyRotary] P-port breakthrough From: Tracy To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=f46d040169eddb0b7d04b6fe05d9 --f46d040169eddb0b7d04b6fe05d9 Content-Type: text/plain; charset=ISO-8859-1 Sounds like it's working for you but if those check valves are "good" ie, don't leak, the MP won't go up fast enough at the EC2/3 port and the engine will probably bog down and die when you open the throttle (especially if done rapidly).. Check your throttle response to be sure the EC2/3 sees the true MP when you go to WFO. Tracy On Fri, Jan 20, 2012 at 6:04 PM, Mark Steitle wrote: > I made a major breakthrough today. In preparation for hooking up my new > Hytek data logger, I decided that it would be a good idea to install check > valves in the vacuum lines leading from each rotor housing. (For those who > are unaware, I am running a peripheral port 3-rotor with a slide throttle > TB.) My system measures MAP from the unused oil injection ports in each > rotor housing. Not sure what possessed me to do a ground run right then, > but I decided to do a ground run after installing the check valves. Now > keep in mind that typical MAP readings at idle up to this point was approx. > 17". This has been bugging me, but it didn't stop me from flying. Well, > today's MAP readings were in the 14.4" - 15.0" range. Then it dawned on me > that the way the vacuum lines were plumbed the EC-2 would see an average of > all three rotors. Since each rotor is 120* (crank degrees) apart in their > 4-stroke cycle, the MAP would be quite a bit different for each rotor. By > installing check valves in the vacuum lines, I have now isolated each rotor > from the other two and am measuring the lowest vacuum. Idle is now down to > a respectable 1500 rpm, but the mixture has gone way lean, so it appears > that a re-tune is in order. I'll probably re-set the EC-2 to the factory > defaults and start the process over from the very beginning. > > I would like to strongly suggest to anyone that is measuring MAP in the > rotor housings to install check valves in each of the lines. Your EC-2/3 > will thank you for it. > > Mark > --f46d040169eddb0b7d04b6fe05d9 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Sounds like it's working for you but if those check valves are "go= od" ie, don't leak,=A0 the MP won't go up fast enough at the E= C2/3 port and the engine will probably bog down and die when you open the t= hrottle (especially if done rapidly)..=A0=A0 Check your throttle response t= o be sure the EC2/3 sees the true MP when you go to WFO.

Tracy
=A0

On Fri, Jan 20, 2012 at = 6:04 PM, Mark Steitle <msteitle@gmail.com> wrote:
I made a major breakthrough today. =A0In preparation for hooking up my= new Hytek data logger, I decided that it would be a good idea to install c= heck valves in the vacuum lines leading from each rotor housing. =A0(For th= ose who are unaware, I am running a peripheral port 3-rotor with a slide th= rottle TB.) =A0My system measures MAP from the unused oil injection ports i= n each rotor housing. =A0Not sure what possessed me to do a ground run righ= t then, but I decided to do a ground run after installing the check valves.= =A0Now keep in mind that typical MAP readings at idle up to this point was= approx. 17". =A0This has been bugging me, but it didn't stop me f= rom flying. =A0Well, today's MAP readings were in the 14.4" - 15.0= " range. =A0Then it dawned on me that the way the vacuum lines were pl= umbed the EC-2 would see an average of all three rotors. =A0Since each roto= r is 120* (crank degrees) apart in their 4-stroke cycle, the MAP would be q= uite a bit different for each rotor. =A0By installing check valves in the v= acuum lines, I have now isolated each rotor from the other two and am measu= ring the lowest vacuum. =A0Idle is now down to a respectable 1500 rpm, but = the mixture has gone way lean, so it appears that a re-tune is in order. = =A0I'll probably re-set the EC-2 to the factory defaults and start the = process over from the very beginning. =A0

I would like to strongly suggest to anyone that is meas= uring MAP in the rotor housings to install check valves in each of the line= s. =A0Your EC-2/3 will thank you for it. =A0

Mark

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