X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-wy0-f180.google.com ([74.125.82.180] verified) by logan.com (CommuniGate Pro SMTP 5.4c2) with ESMTPS id 4901055 for flyrotary@lancaironline.net; Wed, 09 Mar 2011 16:03:05 -0500 Received-SPF: pass receiver=logan.com; client-ip=74.125.82.180; envelope-from=rwstracy@gmail.com Received: by wyj26 with SMTP id 26so888504wyj.25 for ; Wed, 09 Mar 2011 13:02:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; bh=nHK44dWG5JEeYilkxpWks5NqbPdVzC2nla7F0I93+A8=; b=w28bPNOgHHHQfW2jePJZptNTGjX2WWPUOH3W/dvoHnHNOWTY+UhVjz0c3nAVamSYy4 yvvTq8oV9dfN42TsKr4EINMqdnf1w8kUPw+FPzJiFprPpztLxTVmEncWH1/ZCoq78n6d sws4vAaf6qKqZ4rx+8VMwrP4RnKs/eTzFESxs= 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=U5W1lh8C/FYwzwKdfm892e8uk6DNfHpRGYBEJ56AiEJqqWH2JmU6Z9Nl2rKdjc9plW ppcr9yw/6XwP89zE98rsLV/uIJy3T4TNT1h1Jm0DGYNHBO/NXr1/4z+LlBaf9Hakydqf Km7dJDlgAHbnB0iLZatfP0ImpXF9akjeGtBps= MIME-Version: 1.0 Received: by 10.217.2.73 with SMTP id o51mr5365915wes.66.1299704548730; Wed, 09 Mar 2011 13:02:28 -0800 (PST) Sender: rwstracy@gmail.com Received: by 10.216.230.215 with HTTP; Wed, 9 Mar 2011 13:02:28 -0800 (PST) In-Reply-To: References: Date: Wed, 9 Mar 2011 16:02:28 -0500 X-Google-Sender-Auth: 6rhz9LRqgtT7wxMOxh22O6gdQV4 Message-ID: Subject: Re: [FlyRotary] Re: more staging and tuning From: Tracy To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=20cf30207862f0a790049e130b10 --20cf30207862f0a790049e130b10 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Interesting results Steve. I didn't think a simple across the board increase would be that effective. In view of your earlier results I made a minor change to the EC2/3 software to bump up the injector pulse width but only when the staging point is reached. This only applies to the setup fo= r same sized primary & secondary injectors. With the much larger secondaries on the 4 port Renesis the mixture goes rich instead of lean at the staging point (unless Mode 6 is adjusted to compensate). I have not flight tested the change yet. Tracy On Wed, Mar 9, 2011 at 1:11 PM, Ed Anderson wrot= e: > Ah, Ok Steve, thanks for the explanation. That's when your adjustment > was made (with pulse lengthening HW) in order to show the results on the > right hand side of the plot - got it. > > Ok, makes sense that if adjusting the map takes care of the staging "bog" > then it=92s the equivalent of adding 1.2 msec (fuel equivalent) to the va= lues > in the Fuel MAP. > > Ed. > > > > *From:* Steven W. Boese > *Sent:* Wednesday, March 09, 2011 12:59 PM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: more staging and tuning > > Ed, > > > > Those perturbations you see are the result of engaging the pulse width > addition hardware and the readjustment of modes 3 and 2 along with a > momentary manual mixture change that was unnecessary. I should have labe= led > three regions on the plot with the area you are referring to as a > readjustment period. > > > > That plot was a quick attempt at showing the effect of the pulse width > addition in a single session. The adjustments were probably not the best > since it was cold, windy, and our latest snowstorm was just getting > started. Since this data was collected in my back yard, I try to keep th= e > sessions short for the neighbor=92s benefit. So far, though, the horses= just > across the alley are the only neighbors that have shown any interest. > > > > I suspect that adding the injector lag time is a large part of what > adjusting the MAP table is doing when using either of the two tuning meth= ods > described previously. The second method may be easier just because the s= tep > in the table at staging has already been eliminated. > > > > Steve > > > > > > *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] *O= n > Behalf Of *Ed Anderson > *Sent:* Wednesday, March 09, 2011 10:12 AM > > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: more staging and tuning > > > > Fascinating, Steve > > > > I presume the perturbation we see in the right side of left plot (Tuning > Plot1.jpg) as you decrease engine rpm (and I see a tweak of the manual > mixture control -- perhaps to keep the engine from dying?) - the O2 senso= r > bobbing between rich and lean. I do not see that pertubation on the righ= t > plot - is this (bobbing between rich and lean) due to the controller > causing the injectors to actually cut off (not open) due to the 1.2 msec > delay not being compensated for??? > > > > If one had the controller map math, it might be possible to add the > "1.2msec" of fuel missing by increasing the MAP value in each > bin??? However, I guess (even if possible) it would be easier to > compensate by using your method 1 or 2. > > > > Good work, really appreciate you sharing it with us > > > > Ed > > > --20cf30207862f0a790049e130b10 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Interesting results Steve.=A0 I didn't think a simple across the board = increase would be that effective.=A0 In view of your earlier results I made= a minor change to the EC2/3 software to bump up the injector pulse width b= ut only when the staging point is reached.=A0=A0 This only applies to the s= etup for same sized primary & secondary injectors.=A0 With the much lar= ger secondaries on the 4 port Renesis the mixture goes rich instead of lean= at the staging point (unless=A0 Mode 6 is adjusted to compensate).

I have not flight tested the change yet.

Tracy=A0

On Wed, Mar 9, 2011 at 1:11 PM, Ed Anderson <eanderson@carolin= a.rr.com> wrote:
Ah, Ok Steve, thanks for the explanation.=A0 That= 's=20 when your adjustment was made (with pulse lengthening HW) in order to show = the=20 results on the right hand side of the plot - got it.=A0
=A0
Ok, makes sense that if adjusting the map takes c= are of=20 the staging "bog" then it=92s the equivalent of adding 1.2 msec (= fuel=20 equivalent)=A0to the values in=A0the Fuel MAP.
=A0
Ed.
=A0
=A0

Sent: Wednesday, March 09, 2011 12:59 PM
Subject: [FlyRotary] Re: more staging and tuning

Ed,

=A0

Those= =20 perturbations you see are the result of engaging the pulse width addition= =20 hardware and the readjustment of modes 3 and 2 along with a momentary manua= l=20 mixture change that was unnecessary.=A0 I should have labeled three regions= =20 on the plot with the area you are referring to as a readjustment=20 period.

=A0

That= =20 plot was a quick attempt at showing the effect of the pulse width addition = in a=20 single session.=A0 The adjustments were probably not the best since it was= =20 cold, windy, and our latest snowstorm was just getting started.=A0 Since th= is=20 data was collected in my back yard, I try to keep the sessions short for th= e=20 neighbor=92s benefit.=A0 So far, though, =A0the horses just across the alle= y=20 are the only neighbors that have shown any interest.

=A0

I=20 suspect that adding the injector lag time is a large part of what adjusting= the=20 MAP table is doing when using either of the two tuning methods described=20 previously.=A0 The second method may be easier just because the step in the= =20 table at staging has already been eliminated.=A0

=A0

Steve=

=A0

=A0<= /p>

From:= Rotary motors in=20 aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed=20 Anderson
Sent: Wednesday, March 09, 2011 10:12 AM


To: Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: more staging an= d=20 tuning

=A0

Fascinating,=20 Steve

=A0

I presume the=20 perturbation we see in the right side of left plot (Tuning Plot1.jpg)=A0 as= =20 you decrease engine rpm (and I see a tweak of the manual mixture control --= =20 perhaps to keep the engine from dying?) - the O2 sensor bobbing between ric= h and=20 lean.=A0 I do not see that pertubation on the right plot -=A0=A0is this=20 (bobbing between rich and lean) =A0due to the controller causing the=20 injectors to actually cut off (not open) due to the 1.2 msec delay not bein= g=20 compensated for???

=A0

If one had the=20 controller map math,=A0it might be possible to add the "1.2msec" = of fuel=20 missing by increasing the MAP value in each bin???=A0=A0However, =A0I=20 guess (even if possible) it would be easier to compensate by using your met= hod 1=20 or 2.

=A0

Good work, really= =20 appreciate you sharing it with us

=A0

Ed

=A0


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