X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120] verified) by logan.com (CommuniGate Pro SMTP 5.4c2) with ESMTP id 4900912 for flyrotary@lancaironline.net; Wed, 09 Mar 2011 13:13:00 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=eanderson@carolina.rr.com Return-Path: X-Authority-Analysis: v=1.1 cv=uESSSoDEku2quKX/oFXS2Smn5+55LTFcWFr5T5T8nFs= c=1 sm=0 a=yhMFL1FcOyYA:10 a=rPkcCx1H5rrOSfN0dPC7kw==:17 a=Ia-xEzejAAAA:8 a=FgEezHq1PK3R4AXLyGsA:9 a=nVPKxqbi6ZmsNkYseVIA:7 a=l581VhYEVnNbZe0mcnrgHEdkiecA:4 a=wPNLvfGTeEIA:10 a=EzXvWhQp4_cA:10 a=yMhMjlubAAAA:8 a=HchNZNwpw5RhXXq-dpQA:9 a=HnK59H0D1534kWMVpJAA:7 a=iafqaCyxWf6a7c-3S5t_0BJDCGIA:4 a=rPkcCx1H5rrOSfN0dPC7kw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 174.110.167.5 Received: from [174.110.167.5] ([174.110.167.5:51745] helo=EdPC) by cdptpa-oedge01.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id 9B/7B-07087-703C77D4; Wed, 09 Mar 2011 18:12:23 +0000 Message-ID: From: "Ed Anderson" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: more staging and tuning Date: Wed, 9 Mar 2011 13:11:57 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000E_01CBDE5B.916078C0" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 This is a multi-part message in MIME format. ------=_NextPart_000_000E_01CBDE5B.916078C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 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.=20 Ok, makes sense that if adjusting the map takes care of the staging = "bog" then it's the equivalent of adding 1.2 msec (fuel equivalent) to = the values in the Fuel MAP. Ed. From: Steven W. Boese=20 Sent: Wednesday, March 09, 2011 12:59 PM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: more staging and tuning Ed, =20 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 = labeled three regions on the plot with the area you are referring to as = a readjustment period. =20 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 = the sessions short for the neighbor's benefit. So far, though, the = horses just across the alley are the only neighbors that have shown any = interest. =20 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 = methods described previously. The second method may be easier just = because the step in the table at staging has already been eliminated. =20 =20 Steve =20 =20 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On = Behalf Of Ed Anderson Sent: Wednesday, March 09, 2011 10:12 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: more staging and tuning =20 Fascinating, Steve =20 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 = sensor bobbing between rich and lean. I do not see that pertubation on = the right 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???=20 =20 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.=20 =20 Good work, really appreciate you sharing it with us =20 Ed =20 ------=_NextPart_000_000E_01CBDE5B.916078C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Ah, Ok Steve, thanks for the explanation.  = 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. 
 
Ok, makes sense that if adjusting the map takes = care of=20 the staging "bog" then it=92s the equivalent of adding 1.2 msec (fuel=20 equivalent) to the values in the Fuel MAP.
 
Ed.
 
 

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

Ed,

 

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 = manual=20 mixture change that was unnecessary.  I should have labeled three = regions=20 on the plot with the area you are referring to as a readjustment=20 period.

 

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

 

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 = previously.  The second method may be easier just because the step = in the=20 table at staging has already been eliminated.  =

 

Steve

 

 

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 and=20 tuning

 

Fascinating,=20 Steve

 

I presume = the=20 perturbation we see in the right side of left plot (Tuning = Plot1.jpg)  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 = rich and=20 lean.  I do not see that pertubation on the right plot = -  is this=20 (bobbing between rich and lean)  due to the controller causing the=20 injectors to actually cut off (not open) due to the 1.2 msec delay not = being=20 compensated for???

 

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

 

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

 

Ed

 

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