X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from qw-out-2122.google.com ([74.125.92.27] verified) by logan.com (CommuniGate Pro SMTP 5.2.12) with ESMTP id 3499995 for flyrotary@lancaironline.net; Wed, 18 Feb 2009 20:56:55 -0500 Received-SPF: pass receiver=logan.com; client-ip=74.125.92.27; envelope-from=rwstracy@gmail.com Received: by qw-out-2122.google.com with SMTP id 8so76188qwh.25 for ; Wed, 18 Feb 2009 17:56:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:received:in-reply-to :references:date:x-google-sender-auth:message-id:subject:from:to :content-type; bh=9bnMAm66ZMeuYPhaideyjQpBqP/ISFT830WN1UGfuQY=; b=fPv1qlvwVxeorOKaMUgzxwAZ4MoKtgxGIEnnbwIVBBqSh7Xphv7R5s8ELzD2i1UmhX slPUfk2sRt946zhgddq6i7UUD3DPKWpBxsWhV72QZnUeulwUt9RCPpv0g3cqTOUXfOD4 Sa6pFRm94yOIwKZrEjiZsBprAdrlorhiNXges= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=xxx4c6cCswrTYSl16j4aXHeWW3qdbqZSDEeIQF8apd0jmpKuXA8W9hYCcLvKX83umO zVpW7twN7yc95SOQGPWHjrySJxvS5axB49YIfjTr8L2Q06HAwjRv8rSlKSx/fwId6lCj zd5sX1TCJ4uO4NXDZrl/QMdPk/exaguZcRDWk= MIME-Version: 1.0 Sender: rwstracy@gmail.com Received: by 10.224.28.72 with SMTP id l8mr918239qac.77.1235008579462; Wed, 18 Feb 2009 17:56:19 -0800 (PST) In-Reply-To: References: Date: Wed, 18 Feb 2009 20:56:19 -0500 X-Google-Sender-Auth: 79e45ca85eed5c31 Message-ID: <1b4b137c0902181756v79ad1330g321d2dd4a9b003da@mail.gmail.com> Subject: Re: [FlyRotary] staging From: Tracy Crook To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0015175ccf40ac674204633bd71f --0015175ccf40ac674204633bd71f Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit I can certainly understand the possible confusion in calculating manifold pressure from Map Table address. I used to do that (or try : ) on the EM2 as well but with all the changes I gave up on it. EM2 users will note that it now reads RPM where the computed MP used to be. The actual MP is still displayed on the "Live" engine data on the lower two lines when in MAP table display mode. Yes, all programming via the EC2/3 panel is only active while the engine is running. All EC2/3 programming commands are ignored when engine is stopped. The only exceptions are the power-up programming procedures for resetting parameters to factory default. It is possible to do some programming using the serial data command protocols as the EM2/3 does. Tracy On Wed, Feb 18, 2009 at 12:07 PM, sboese wrote: > Tracy and all, > > Looking back at the data I was using when thinking about my "staging bog", > I realize that the manifold pressures I am looking at are values I calculate > from the EC2 data. My conversion to units of inches Hg may not be correct. > Either my EC2 manifold pressure sensor may have changed calibration or I may > have never had this conversion correct to begin with. I have only one > program to do this and may not have it right. How Tracy keeps track of all > the versions of EC's is beyond me. > > In any case, I can NOT say with certainty that my EC2 is internally > inconsistent as I stated in my previous message. I apologize if this has > caused you to waste any of your valuable time and energy over this. > > The reason I am concerned with staging more than many others might be is > that at the ground level density altitudes of my home airport, the maximum > manifold pressure I see is about 23 inches and of course it gradually drops > off from there as I climb. This results in staging taking place during > critical flight regimes. Encountering an extended "bog" right after take > off is not my idea of fun. If I cannot get the staging to work well using > mode 6, I am considering David Leonard's suggestion of moving the staging > point to a higher manifold pressure where I will not normally encounter it. > In my case this is need not be much of a change. The manual indicates that > some modes are active only when the engine is running. Is this the case > with mode 7? I'm trying to make sure I can set the staging point with a > pressure source other than the engine. > > This does generate the potential for my next trip to lower altitudes to be > memorable. I just have to remember that this is venturing into unknown > territory again and that full throttle operation may not be reliable until > tuning at the higher power settings accessible at lower altitudes has been > accomplished. > > Again, my apologies to especially to Tracy and also the rest of you. > > Steve Boese > > > > > > > --0015175ccf40ac674204633bd71f Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable I can certainly understand the possible confusion in calculating manifold p= ressure from Map Table address.  I used to do that (or try : ) on the = EM2 as well but with all the changes I gave up on it.  EM2 users will = note that it now reads RPM where the computed MP used to be.  The actu= al MP is still displayed on the "Live" engine data on the lower t= wo lines when in MAP table display mode.

Yes, all programming via the EC2/3 panel is only active while the engin= e is running.  All EC2/3 programming commands are ignored when engine = is stopped.  The only exceptions are the power-up programming procedur= es for resetting parameters to factory default.   It is possible = to do some programming using the serial data command protocols as the EM2/3= does.

Tracy


On Wed, Feb 18, 2009 at 12:= 07 PM, sboese <sboe= se@uwyo.edu> wrote:

Tracy and all,

Looking back at the data I was u= sing when thinking about my "staging bog", I realize that the manifold pressures I am looking at are values I calculate from the EC2 data.  M= y conversion to units of inches Hg may not be correct.  Either my EC2 manifold pressure sensor may have changed calibration or I may have never h= ad this conversion correct to begin with.  I have only one program to do this = and may not have it right.  How Tracy keeps track of all the versions of E= C's is beyond me.

In any case, I can NOT say with = certainty that my EC2 is internally inconsistent as I stated in my previous message.&= nbsp; I apologize if this has caused you to waste any of your valuable time and energy over this.

The reason I am concerned with s= taging more than many others might be is that at the ground level density altitude= s of my home airport, the maximum manifold pressure I see is about 23 inches and= of course it gradually drops off from there as I climb.  This results in staging taking place during critical flight regimes.  Encountering an extended "bog" right after take off is not my idea of fun.  If I cannot get the staging to work well using mode 6, I am considering David Leonard's suggestion of moving the staging point to a higher manifold pressure where I will not normally encounter it.  In my case this is n= eed not be much of a change.  The manual indicates that some modes are act= ive only when the engine is running.  Is this the case with mode 7?  = I'm trying to make sure I can set the staging point with a pressure source othe= r than the engine.

This does generate the potential= for my next trip to lower altitudes to be memorable.  I just have to remember that this is venturing into unknown territory again and that full throttle opera= tion may not be reliable until tuning at the higher power settings accessible at= lower altitudes has been accomplished.

Again, my apologies to especiall= y to Tracy and also the rest of you.

Steve Boese

  

 

   =  


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