X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-qw0-f45.google.com ([209.85.216.45] verified) by logan.com (CommuniGate Pro SMTP 5.4.3) with ESMTPS id 5358418 for flyrotary@lancaironline.net; Fri, 20 Jan 2012 20:09:50 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.216.45; envelope-from=wrjjrs@gmail.com Received: by qabg40 with SMTP id g40so698896qab.4 for ; Fri, 20 Jan 2012 17:09:16 -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=gy55YFiJKMvA4HQgODLJaonZiDfD1cQLUshP8u8b2Zg=; b=iwaqtFjw4IuJLx+Xj9850K7lnVkyCIAe+XfWVrMgTE5ZAiX9Pgw65ydK/fIPsymaI7 eD3ZaHN1e8Rg6CsHFiv4D0eWkkrHDv0DqomQtBdhawUeVqECH2soiq1Sa5ufFLNFTRTe OIul2XGBY84fyk2r9ZCX36hJdi0NWy/20f2Ow= MIME-Version: 1.0 Received: by 10.224.42.10 with SMTP id q10mr473591qae.26.1327108156769; Fri, 20 Jan 2012 17:09:16 -0800 (PST) Received: by 10.229.181.9 with HTTP; Fri, 20 Jan 2012 17:09:16 -0800 (PST) In-Reply-To: References: Date: Fri, 20 Jan 2012 17:09:16 -0800 Message-ID: Subject: Re: [FlyRotary] Re: P-port breakthrough From: William Jepson To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=20cf3074d7924345a604b6ff72bb --20cf3074d7924345a604b6ff72bb Content-Type: text/plain; charset=ISO-8859-1 Mark, having any kind of an air leak, even throttle bore to throttle bore, is bad so your check valves are probably a good idea. Tracy, if the system responds to both throttle opening, in degrees, and map it should respond better once tuned. Bill Jepson On Fri, Jan 20, 2012 at 5:02 PM, Mark Steitle wrote: > Tracy, > > OK, what you said just registered in the grey matter. Any ideas on what > to do if the MAP does't come up fast enough resulting in bogging? > Calibrated air bleeds? > > Mark > > > On Fri, Jan 20, 2012 at 6:46 PM, Mark Steitle wrote: > >> Tracy, >> >> Thanks, I'll check that, but remember... I've got three of those >> "suckers" and they're working overtime. >> >> Mark >> >> On Fri, Jan 20, 2012 at 5:27 PM, Tracy wrote: >> >>> 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 >>>> >>> >>> >> > --20cf3074d7924345a604b6ff72bb Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Mark, having any kind of an air leak, even throttle bore to throttle b= ore, is bad so your check valves are probably a good idea. Tracy, if the sy= stem responds to both throttle opening, in degrees, and map it should respo= nd better once tuned.
Bill Jepson

On Fri, Jan 20, 20= 12 at 5:02 PM, Mark Steitle <msteitle@gmail.com> wrote:
Tracy,=A0

OK, what you said just registered in the grey = matter. =A0Any ideas on what to do if the MAP does't come up fast enoug= h resulting in bogging? =A0Calibrated air bleeds?

Mark


On Fri, Jan 20, 2012 at 6:46 PM, Mark Steitl= e <msteitle@gmail.com> wrote:
Tracy,=A0

Thanks,=A0I'll check that, but remember...= I've got three of those "suckers" and they're working ov= ertime.

Mark =A0

On Fri, Jan 20, 2012 at 5:27 PM, Tracy <rwstracy@gmail.com> wrote:
Sounds like it's working for you but if those check va= lves are "good" ie, don't leak,=A0 the MP won't go up fas= t enough at the EC2/3 port and the engine will probably bog down and die wh= en you open the throttle (especially if done rapidly)..=A0=A0 Check your th= rottle response to 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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