X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.123] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3877582 for flyrotary@lancaironline.net; Wed, 07 Oct 2009 07:28:16 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.123; envelope-from=eanderson@carolina.rr.com Received: from computername ([75.191.186.236]) by cdptpa-omta03.mail.rr.com with ESMTP id <20091007112740717.CFSP14562@cdptpa-omta03.mail.rr.com> for ; Wed, 7 Oct 2009 11:27:40 +0000 From: "Ed Anderson" To: "'Rotary motors in aircraft'" Subject: Bog : [FlyRotary] Re: engine runup video Date: Wed, 7 Oct 2009 07:28:25 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002B_01CA471F.C2526B20" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Thread-Index: AcpHAu3ihCZQNk3pSI6775r2rPxb/wAPeHjg In-Reply-To: Message-Id: <20091007112740717.CFSP14562@cdptpa-omta03.mail.rr.com> This is a multi-part message in MIME format. ------=_NextPart_000_002B_01CA471F.C2526B20 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit I adjusted the "BOG" away in much the same way as Mike did. I watched the air/fuel ratio indicator and noticed that when the bog started the A/F ratio would run down and drop off the lean end. Ergo, I assumed that was an indication the A/F ratio was a bit on the lean side. I also noticed on the EFISM which MCT "bin" this occurred in and started adjusting the bars to a higher (larger) value increasing the fuel until the Bog stopped. As best I recalled I had to do this for about 3-4 bins around the staging area before the Bob forever went away. Sort of nice after putting up with it for 4 years. 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 _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mike Wills Sent: Wednesday, October 07, 2009 12:01 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: engine runup video Bill, I cant speak for anyone else, but my engine goes lean when it stages. I know what location in the MCT the transition occurs by looking at the MCT using the EFISM in real time. I simply set the first location where it runs on 4 injectors way richer than the previous location. The next couple of locations gradually taper back down to a more normal mixture. At this point I trial and error adjust the rich location back down until the bog re-appears, then richen back up a little. Its really pretty straight forward with the EFISM - I assume Tracy's EM makes it equally easy. Mike Wills RV-4 N144MW ----- Original Message ----- From: Bill Bradburry To: Rotary motors in aircraft Sent: Tuesday, October 06, 2009 5:24 AM Subject: [FlyRotary] Re: engine runup video Mike, Judging from the ease with which you tuned out the staging bog, you have a pretty good handle on how to tune the engine with the EC-2/3. For the benefit of the ones of us who are still trying to understand that tricky little gem, could you give us some kind of blow by blow as to how you went about tuning the bog out? I am wondering what you looked for to determine where the problem was and what you then did with trial and error? to tune it out. Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mike Wills Sent: Sunday, October 04, 2009 12:35 PM To: Rotary motors in aircraft Subject: [FlyRotary] engine runup video For anyone who hasnt had that first engine run and is looking for some motivation. A buddy visited the hangar a few weeks ago and shot some video of an engine runup. He posted it to his website and you can find it here: http://www.stinsonvoyager.com/images/MikeWills13bEngineRun.wmv This was shot right after I re-installed my original muffler after the aborted DNA muffler test. Noticeable in the video is the big staging bog. I had this tuned out about 15 minutes after he shot the video. Mike Wills RV-4 N144MW __________ 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_002B_01CA471F.C2526B20 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I adjusted the “BOG” = away in much the same way as Mike did.   I watched the air/fuel ratio = indicator and noticed that when the bog started the A/F ratio would run down and drop = off the lean end.  Ergo, I assumed that was an indication the A/F ratio was = a bit on the lean side.    I also noticed on the EFISM which MCT = “bin” this occurred in and started adjusting the bars to a higher (larger) value increasing = the fuel until the Bog stopped.  As best I recalled I had to do this = for about 3-4 bins around the staging area before the Bob forever went away.  = Sort of nice after putting up with it for 4 years.

 

Ed

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mike Wills
Sent: Wednesday, October = 07, 2009 12:01 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = engine runup video

 

Bill,

 

 I cant speak for anyone else, but my engine = goes lean when it stages. I know what location in the MCT the transition occurs by looking at the MCT using the EFISM in real time. I simply set the first location where it runs on 4 injectors way richer than the previous = location. The next couple of locations gradually taper back down to a more normal mixture. At this point I trial and error adjust the rich location back = down until the bog re-appears, then richen back up a little. Its really pretty = straight forward with the EFISM - I assume Tracy's EM makes it equally easy.

 

Mike Wills

RV-4 N144MW

----- Original Message ----- =

Sent: = Tuesday, October 06, 2009 5:24 AM

Subject: = [FlyRotary] Re: engine runup video

 

Mike,

Judging from the ease with which you tuned out the staging bog, = you have a pretty good handle on how to tune the engine with the = EC-2/3.

For the benefit of the ones of us who are still trying to = understand that tricky little gem, could you give us some kind of blow by blow as = to how you went about tuning the bog out?  I am wondering what you looked = for to determine where the problem was and what you then did with trial and = error? to tune it out.

Bill B 

 

From: Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net] On Behalf Of Mike = Wills
Sent: Sunday, October 04, = 2009 12:35 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] = engine runup video

For anyone who hasnt had that first engine run and is looking for some motivation. A buddy visited the hangar a few weeks ago = and shot some video of an engine runup. He posted it to his website and you = can find it here:

 

 

This was shot right after I re-installed my original = muffler after the aborted DNA muffler test. Noticeable in the video is the big = staging bog. I had this tuned out about 15 minutes after he shot the = video.

 

Mike Wills

RV-4 N144MW



__________ Information from ESET NOD32 Antivirus, version of virus = signature database 3267 (20080714) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com

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