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 5.3.10) with ESMTP id 4557731 for flyrotary@lancaironline.net; Sat, 06 Nov 2010 10:48:48 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.123; envelope-from=eanderson@carolina.rr.com Return-Path: X-Authority-Analysis: v=1.1 cv=uESSSoDEku2quKX/oFXS2Smn5+55LTFcWFr5T5T8nFs= c=1 sm=0 a=rPkcCx1H5rrOSfN0dPC7kw==:17 a=arxwEM4EAAAA:8 a=r1ClD_H3AAAA:8 a=d9s6oHVU8LCo2Adu0aoA:9 a=TJ68rM0Gc1cd2IUh3dcA:7 a=6Xr1o8pdlF5b7C2-SBrcYCzAL9sA:4 a=pILNOxqGKmIA:10 a=E93lBu2AAAAA:8 a=oXLvgaRnxOnDVXe2xB0A:9 a=QWCU68C8CIOrgLFp6V0A:7 a=HWW7Y_P0hvfInmeB5nR4EkvJO_8A:4 a=hO30gm18fF0A:10 a=MpuOTR30KwMA:10 a=FOUTPhXFUAcA:10 a=zgjei8Deq7QA:10 a=NWVoK91CQyQA:10 a=rPkcCx1H5rrOSfN0dPC7kw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 174.110.167.5 Received: from [174.110.167.5] ([174.110.167.5:52915] helo=EdPC) by cdptpa-oedge01.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id 5F/FE-07087-CAA65DC4; Sat, 06 Nov 2010 14:48:12 +0000 Message-ID: <6CF57559531E43A58357A1F1AE0CFD76@EdPC> From: "Ed Anderson" To: "Rotary motors in aircraft" Subject: Ec Modes Date: Sat, 6 Nov 2010 10:47:52 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001F_01CB7DA0.0FD9EA50" 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_001F_01CB7DA0.0FD9EA50 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Ok, admitting to being a bit lazy after flying with the Ec2 for = approaching 8-9 years now, I decided to read the manual (again?). Here is a summary of my understanding of the EC2 Fuel related Modes - = subject to clarification by those (he?) who really understand the modes. = This brief summary IS NOT a substitute for reading the manual in = detail. Any errors, mistatements, lack in understanding of this summary = are mine alone, any suggestions for clarification welcomed! Mode 0 - Normal running mode - pushing the program store button is this = mode does nothing - setting the program select to this mode prevents = inadvertent "adjustment" of the EC2 during flight. Mode 1- MAP adjustment mode - permits you to adjust the Fuel correction = factors for each bin (manifold pressure points) by using the Left = Mixture Program Knob and then storing the adjustment in the Fuel Map by = pressing the Program Store Button. =20 This is an absolute adjustment to the current fuel MAP values, in other = words setting the Program Mixture control knob all the way CCW (lean) = and pressing store would place a minimum value (zero?) in that bin. = Setting the Mixture control knobe all the way CW (rich) would store a = maximum value (255?) in that bin. This contrasts to the Mode 9 = adjustment of the MAP table which is apparently incremental from the = current setting. Note: Injector Diagnostic Mode: With engine off = pushing Program Store Button in this mode will trigger the injector = diagnostic mode - make certain your fuel pumps are all OFF! Mode 2- Copy MAP mode - used to copy controller A programming to = controller B. Mode 3 - Fuel Injector Flow Adjustment - used to compensate in the MAP = table for the use of larger injectors (I.e. When all four injectors have = higher flow rates than approx 460 cc/min) than the stock 13B N/A engine. = =20 If you can not adequately lean your engine with the larger injectors, it = appears that this mode can be used to "adjust the flow" to an = acceptable range. Note: I once tried going from my stock N/A 460 cc/min injectors to 550 = cc/min injectors - I could never get the engine to idle properly - = always too rich at one end or the other, so I went back to stock. If I = had been smarter and read the manual more closely, I think adjustment in = this mode might have solved the "too rich" idle problem Mode 4 - Front Rotor Mixture Adjustment - Used to compensate for small = differences in the mixture between the front and rear rotor - adjust = front rotor to match EGT of rear rotor - Note from the Ec2 Manual:=20 You can accomplish this by monitoring the EGTs of the two rotors and = getting them to match as closely as possible. A digital EGT gauge is = almost a necessity to read small differences. Mode 6 - Secondary Injector Differential Adjustment - Used if secondary = injectors have larger flow rates than primary injectors - this may = result in an overly rich mixture above the staging point. =20 This adjustment is used to compensate for the larger secondary = injectors. Normally, you would observe the Air/Fuel Ratio indication = and would need to lean the flow below staging point so that it would not = be overly rich after staging. At least that is what I think I read Mode 9 - Adjust MAP table entry - Similar to Mode1 in making = adjustments of MAP table, but is used to make even finer adjustments. =20 While Mode 1 settings make absolute value changes to the value in the = bin of the MAP, Mode 9 is used to make smaller relative adjustments to = the MAP value in the bin being adjusted. The closer the Mixture knob is = to 12:00 the smaller the change, the further CCW (lean) or CW (rich) the = greater the relative adjustment. Read the instructions for details. Mode 9 is recommended for making any IN-FLIGHT changes to the MAP table = as the effects of this mode's changes are far less dramatic than being = in MODE 1 and having the knob fully CCW when you push the Program Store = Button {:>). The engine will cough for a moment (as it goes full lean) = and then shift to a more satisfactory fuel MAP value bin before = continuing to run. I don't about most of you - but I'm getting to the = age that I don't like the engine to cough for even a moment. Did I mention read the manual for a fuller description and = understanding? There is a lot of stuff in it and most of us will need = to read it and attempt making the adjustments before it really sticks. One purpose of this summary, is that if my understanding is in error - = then I WANT to know! =20 Ed Edward L. Anderson Anderson Electronic Enterprises LLC 305 Reefton Road Weddington, NC 28104 http://www.andersonee.com http://www.eicommander.com ------=_NextPart_000_001F_01CB7DA0.0FD9EA50 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Ok, admitting to being a bit lazy after = flying with=20 the Ec2 for approaching 8-9 years now, I decided to read the manual=20 (again?).
 
Here is a summary of my = understanding of=20 the EC2 Fuel related Modes - subject to clarification by those = (he?) who=20 really understand the modes.  This brief summary IS = NOT a=20 substitute for reading the manual in detail.  Any errors,=20 mistatements, lack in understanding of this summary  are mine = alone,=20 any suggestions for clarification welcomed!
 
Mode 0 - Normal running = mode - pushing the program store button is this mode does = nothing=20 - setting the program select to  this mode prevents = inadvertent=20 "adjustment" of the EC2 during flight.
 
Mode 1- MAP adjustment mode - = permits you=20 to adjust the Fuel correction factors for each bin (manifold pressure=20 points) by using the Left Mixture Program Knob and then storing the = adjustment in the Fuel Map by pressing the Program Store Button. =20
 
This is an absolute adjustment to the current = fuel MAP=20 values, in other words setting the Program Mixture control knob all the = way CCW=20 (lean) and pressing store would place a minimum value (zero?) in that = bin. =20 Setting the Mixture control knobe all the way CW (rich) would store a = maximum=20 value (255?) in that bin.  This contrasts to the Mode 9 adjustment = of the=20 MAP table which is apparently incremental from the current = setting. =20  Note: Injector Diagnostic Mode:  With engine = off=20 pushing Program Store Button in this mode will trigger the injector = diagnostic=20 mode - make certain your fuel pumps are all OFF!
 
Mode 2- Copy MAP mode - used to = copy=20 controller A programming  to controller=20 B.
 
Mode 3 - Fuel Injector Flow = Adjustment -=20 used to compensate in the MAP table for the use of larger = injectors=20 (I.e. When all four injectors have higher = flow=20 rates than approx 460 cc/min) than the stock 13B N/A = engine. =20
 
If you can not adequately lean your engine with = the larger=20 injectors, it appears that  this mode can be used to "adjust the = flow" to=20 an acceptable range.
 
Note:  I once tried going from my stock N/A = 460=20 cc/min injectors to 550 cc/min injectors - I could never get the engine = to idle=20 properly - always too rich at one end or the other, so I went back to=20 stock.  If I had been smarter and read the manual more closely, I = think=20 adjustment in this mode might have solved the "too rich" idle=20 problem
 
Mode 4 - Front Rotor Mixture = Adjustment -=20 Used to compensate for small differences in the mixture between the = front=20 and rear rotor - adjust front rotor to match EGT of rear rotor  - = Note from=20 the Ec2 Manual:=20

You can accomplish this by monitoring the EGTs of the = two rotors=20 and getting them to match as closely as possible. A digital EGT gauge is = almost=20 a necessity to read small differences.

 
Mode 6 - Secondary Injector Differential = Adjustment - Used if secondary injectors have = larger flow=20 rates than primary injectors - this may result = in an=20 overly rich mixture above the staging point. 
 
This adjustment is used to compensate for the = larger=20 secondary injectors.  Normally,  you would observe the = Air/Fuel Ratio=20 indication and would need to lean the flow below staging point so that = it would=20 not be overly rich after staging. At least that is what I think I=20 read
 
 
Mode 9 - Adjust MAP table = entry  =20 - Similar to Mode1 in making adjustments of MAP table, but = is used=20 to make even finer adjustments. 
 
While Mode 1 settings make absolute value = changes to=20 the value in the bin of  the MAP, Mode 9 is used to make = smaller=20 relative adjustments to the MAP value in the bin being adjusted.  = The=20 closer the Mixture knob is to 12:00 the smaller the change, the further = CCW=20 (lean) or CW (rich) the greater the relative adjustment.  Read the=20 instructions for details.
 
Mode 9 is recommended for making any = IN-FLIGHT=20 changes to the MAP table as the effects of this mode's=20  changes are far less dramatic than being in MODE 1 and having the = knob=20 fully CCW when you push the Program Store Button {:>).  The = engine will=20 cough for a moment (as it goes full lean) and then shift to a more = satisfactory=20 fuel MAP value bin before continuing to run.  I don't about = most of=20 you - but I'm getting to the age that I don't like the engine to = cough for=20 even a moment.
 
Did I mention read the manual for a fuller = description and=20 understanding?  There is a lot of stuff in it and most of us will = need to=20 read it and attempt making the adjustments before it really = sticks.
 
 
One purpose of this summary, is that if my = understanding=20 is in error - then I WANT to know! 
 
 
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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