X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.121] verified) by logan.com (CommuniGate Pro SMTP 5.2.15) with ESMTP id 3784879 for flyrotary@lancaironline.net; Wed, 29 Jul 2009 10:26:54 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.121; envelope-from=eanderson@carolina.rr.com Received: from computername ([75.191.186.236]) by cdptpa-omta01.mail.rr.com with ESMTP id <20090729142613216.XHAK26619@cdptpa-omta01.mail.rr.com> for ; Wed, 29 Jul 2009 14:26:13 +0000 From: "Ed Anderson" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] EC2 and Ed's EFISM - a great combination Date: Wed, 29 Jul 2009 10:26:19 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001D_01CA1037.038B31A0" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 In-Reply-To: thread-index: AcoQTUuUBKgBNWkKTz2lDrrd6LnOmwACXjAg X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Message-Id: <20090729142613216.XHAK26619@cdptpa-omta01.mail.rr.com> This is a multi-part message in MIME format. ------=_NextPart_000_001D_01CA1037.038B31A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks for the kind words about the EFISM, Jeff. I think most folks = will find that being able to graphically see their fuel MAP/MCT makes it much easier to understand what your engine is doing and how well your MAP is adjusted =96 the only two units offered that are capable of doing this = (that I am aware of) Is Tracy=92s RWL excellent EM2/3 system and my EFISM. Either one will = provide this capability.=20 =20 You can certainly tune and fly safely without either of these units to monitor/adjust your MAP =96 I did it for years. However, I never could eliminate my staging bog (for example) until I watch the air/fuel ratio indicator and the fuel MAP as the engine operating point approached the staging point. For whatever the reason, my A/F ratio would take a nose dive toward the lean side just before staging =96 causing a temporary = (but annoying) hesitation or bog. Using the graphical display I began = increasing the richness of each bin as the A/F indicated lean and advance bin by = bin making this adjustment until after increasing 4-6 bins just before the staging point, my staging bog has completely disappeared. =20 It is also difficult (at least for me) to try to tune the EC2 by = advancing the manifold pressure =BD=94 Hg at a time to activate each bin. I also = found (using the EFISM), that when I adjusted the value of the bin my engine = was operating on =96 that change (rich or lean) invariably cause the engine = to change operating conditions =96 just enough so that it would shift to = the adjacent bin or two =96 so I was no longer tuning the same bin as a = moment before. I know some can do it by hear =96 Tracy for example =96 but, = for me visual was much easier to do. =20 In any case whether Tracy=92s EM2/3 or my EFISM =96 I think most will = find a graphical representation easier to work with. =20 Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://www.dmack.net/mazda/index.html http://www.flyrotary.com/ http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.rotaryaviation.com/Rotorhead%20Truth.htm =20 _____ =20 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Jeff Whaley Sent: Wednesday, July 29, 2009 9:05 AM To: Rotary motors in aircraft Subject: [FlyRotary] EC2 and Ed's EFISM - a great combination =20 The following is an excerpt from a Mike Wills post several months ago: =20 =93Anyone trying to tune up Tracy's EC2 without either having an EM2/3 = or Ed Anderson's EFISM, you're wasting your time. I spent the better part of a year tweaking the MAP table and thought I had it pretty well done. On my first flight I spent a fair amount of time fiddling with mixtures and = had a couple of rough running spots. I installed Ed's EFISM and spent 2 days tweaking. In the process I got the engine running smoother than it ever = has and now have it is idling nicely at 1350 RPM. That=92s 300 RPM lower = than I was ever able to get it previously. In my opinion you really HAVE to = have some sort of indication of what is loaded in the MAP table to = effectively tune it.=94 =20 I whole-heartedly agree!! I installed ED=92s EFISM last night and was = anxious to see my MCT =96 let=92s just say it was a mess. There were a few = points, mostly around the staging area, where I could see that some tuning had = taken place; however, there were several locations with wild swings from one = bin to the next. These wild variations appeared in the middle of the high = rpm band where the engine has spent very little time, as I=92m usually near = idle or WOT =96 but man it sure is nice to actually see what=92s going on. Jeff __________ Information from ESET NOD32 Antivirus, version of virus = signature database 3267 (20080714) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ------=_NextPart_000_001D_01CA1037.038B31A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Thanks for the kind words about the = EFISM, Jeff.=A0 I think most folks will find that being able to graphically see = their fuel MAP/MCT makes it much easier to understand what your engine is = doing and how well your MAP is adjusted =A0– the only two units offered = =A0that are capable of doing this (that I am aware of)

Is Tracy’s RWL excellent EM2/3 system and my EFISM.=A0 Either one will provide this = capability.

 

You can certainly tune and fly = safely without either of these units to monitor/adjust your MAP – I did = it for years.=A0 However, I never could eliminate my staging bog (for example) = until I watch the air/fuel ratio indicator and the fuel MAP as the engine = operating point approached the staging point.=A0 For whatever the reason, my A/F = ratio =A0would take a nose dive toward the lean side just before staging – = causing a temporary (but annoying) hesitation or bog.=A0 Using the graphical = display I began increasing the richness of each bin as the A/F indicated lean and = =A0advance bin by bin making this adjustment until after increasing 4-6 bins just = before the staging point, my staging bog has completely = disappeared.

 

It is also difficult (at least for = me) to try to tune the EC2 by advancing the manifold pressure =BD” Hg = =A0at a time to activate each bin.=A0 I also found (using the EFISM), that when I = adjusted the value of the bin my engine was operating on – that change (rich or = lean) invariably cause the engine to change operating conditions – just = enough so that it would shift to the adjacent bin or two – so I was no = longer tuning the same bin as a moment before.=A0 I know some can do it by hear = – Tracy for = example – but, for me visual was much easier to do.

 

In any case whether Tracy’s EM2/3 or my EFISM = – I think most will find a graphical representation easier to work = with.

 

Ed

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Jeff Whaley
Sent: Wednesday, July 29, = 2009 9:05 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] EC2 = and Ed's EFISM - a great combination

 

The following = is an excerpt from a Mike Wills post several months = ago:

 

“Anyone trying to tune up Tracy's EC2 without either having an = EM2/3 or Ed Anderson's EFISM, you're wasting your time. I spent the better part = of a year tweaking the MAP table and thought I had it pretty well done. On my = first flight I spent a fair amount of time fiddling with mixtures and had a = couple of rough running spots. I installed Ed's EFISM and spent 2 days tweaking. = In the process I got the engine running smoother than it ever has and now have = it is idling nicely at 1350 RPM. That’s 300 RPM lower than I was ever = able to get it previously. In my opinion you really HAVE to have some sort = of indication of what is loaded in the MAP table to effectively tune = it.”

 

I = whole-heartedly agree!! I installed ED’s EFISM last night and was anxious to see = my MCT – let’s just say it was a mess. There were a few points, = mostly around the staging area, where I could see that some tuning had taken = place; however, there were several locations with wild swings from one bin to = the next. These wild variations appeared in the middle of the high rpm band = where the engine has spent very little time, as I’m usually near idle or = WOT – but man it sure is nice to actually see what’s going = on.

Jeff



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The message was checked by ESET NOD32 Antivirus.

http://www.eset.com

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