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 5.3.10) with ESMTP id 4557652 for flyrotary@lancaironline.net; Sat, 06 Nov 2010 09:39:05 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.121; envelope-from=eanderson@carolina.rr.com Return-Path: X-Authority-Analysis: v=1.1 cv=pepdxKapwHuwCZNFD5uob2wvham6E+RljB0uXw08FdQ= c=1 sm=0 a=uQ3iQGwzkygA:10 a=rPkcCx1H5rrOSfN0dPC7kw==:17 a=arxwEM4EAAAA:8 a=r1ClD_H3AAAA:8 a=AkcChyUs_R3adXDca_YA:9 a=6W_RQBfpZyi8Z6ORtOkA:7 a=shcPDrdL-7T9U30OHqpMATjjR5kA:4 a=pILNOxqGKmIA:10 a=w67zOnKl6SaoZEiBwB8A:9 a=dUfQ4okMnTG4pc1ztlwA:7 a=frkq9iW1OX00tS2PhW62KWN9JVEA:4 a=rPkcCx1H5rrOSfN0dPC7kw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 174.110.167.5 Received: from [174.110.167.5] ([174.110.167.5:52892] helo=EdPC) by cdptpa-oedge03.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id A0/BF-19545-55A55DC4; Sat, 06 Nov 2010 13:38:30 +0000 Message-ID: <9F1E0C37153F4FE6A21CE4309F39A813@EdPC> From: "Ed Anderson" To: "Rotary motors in aircraft" Subject: Staging Adjustment in EC2 since 2006 Date: Sat, 6 Nov 2010 09:38:10 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000B_01CB7D96.53042CA0" 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_000B_01CB7D96.53042CA0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Pertaining to Steve's data and analysis and Tracy's comments about Mode = 6 of the EC. I went back and read up on the Ec2 modes and found this statement which = I had apparently not paid sufficient attention to, but in light of = Steve's data and findings, thought it might be pertinent to the = discussions. From the EC2 instruction Manual: 01-07-06 update. Because the rotary has two injectors per rotor and they are staged (see = Mode 7 for details on staging), it is possible that the mixture might be miss-matched differently when staged or not staged. You may = have to match the EGTs once when the engine is staged (low power) and again when not staged (high power). So it appears that the EC2 has had the capability to adjust the = different in flow rates across the staging event since at least 2006. = But, perhaps like many others, I was not certain what conditions would = signify this needed adjusting (until Steve's data and analysis) and = therefore never attempted any adjustment (my dumb!) - my philosophy = being if it is working well and you don't have a clue as to what/why you = are adjusting something - then DON'T! {:>) The only "problem" (actually more of an irritant than a problem) I have = ever encountered using the EC2 was the staging "bog" I would encounter = while operating on the ground which I finally eliminated. What I did = was to enrich the fuel MAP in the 3-4 bins in the High MAP region that = the engine point jumped to after staging. This did solve my staging = bob - but, after reading the EC2 instructions again, I can see that if I = probably should have used Mode 6 to accomplish this as my adjustment was = just for 3-4 bins and not all bins. Once again Tracy has addressed the need in the Ec2/3 - but, I just = failed to understand the function (and conditions) it might have = addressed. Now that Steve has clearly shown there is a high probability = that adjusting the staging flow rate will result in more accurate fuel = totalizer values and other fuel factors, I can now see a reason to use = mode 6. Thanks, guys - discussions on this list is generally always educational = and helpful Ed Edward L. Anderson Anderson Electronic Enterprises LLC 305 Reefton Road Weddington, NC 28104 http://www.andersonee.com http://www.eicommander.com ------=_NextPart_000_000B_01CB7D96.53042CA0 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Pertaining to Steve's data and analysis and = Tracy's=20 comments about Mode 6 of the EC.
 
I went back and read up on the Ec2 modes and = found this=20 statement which I had apparently not paid sufficient attention to, but = in light=20 of Steve's data and findings, thought it might be pertinent to the=20 discussions.  From the EC2 instruction Manual:
 

01-07-06=20 update.

Because the rotary has two = injectors per=20 rotor and they are staged (see Mode 7 for details on staging), it is = possible=20 that the mixture

might be = miss-matched=20 differently when staged or not staged. You may have to match the = EGTs=20 once when the engine is staged

(low power) and again when not staged (high=20 power).

So it appears that the EC2 has had the = capability to=20 adjust the different in flow rates across the staging event since at = least=20 2006.  But, perhaps like many others, I was not=20 certain  what conditions would signify this needed adjusting (until = Steve's=20 data and analysis)  and therefore never attempted any = adjustment (my=20 dumb!)  - my philosophy being if it is working well and you don't = have a=20 clue as to what/why you are adjusting something - then DON'T! = {:>)

The only "problem" (actually more of an = irritant than=20 a problem)  I have ever encountered using the EC2 was the staging = "bog" I=20 would encounter while operating on the ground which I finally = eliminated. =20 What I did was to enrich the fuel MAP in the 3-4 bins in the High = MAP=20 region that the engine point jumped to after staging.   This = did solve=20 my staging bob - but, after reading the EC2 instructions again, I can = see that=20 if I probably should have used Mode 6 to accomplish this as my = adjustment was=20 just for 3-4 bins and not all bins.

Once again Tracy has addressed the need = in the =20 Ec2/3 - but, I just failed to understand the function (and conditions) = it might=20 have addressed.  Now that Steve has clearly shown there is a high=20 probability that adjusting the staging flow rate will result in more = accurate=20 fuel totalizer values and other fuel  factors, I can now see a = reason to=20 use mode 6.

Thanks, guys - discussions on this list = is=20 generally always educational and helpful

Ed

 

Edward L. Anderson
Anderson Electronic = Enterprises=20 LLC
305 Reefton Road
Weddington, NC 28104
http://www.andersonee.com
http://www.eicommander.com
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