X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost04.isp.att.net ([204.127.217.104] verified) by logan.com (CommuniGate Pro SMTP 5.3.2) with ESMTP id 4133133 for flyrotary@lancaironline.net; Sun, 21 Feb 2010 22:43:15 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.217.104; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-230-68-40.mco.bellsouth.net[74.230.68.40]) by isp.att.net (frfwmhc04) with SMTP id <20100222034238H0400gv9bae>; Mon, 22 Feb 2010 03:42:38 +0000 X-Originating-IP: [74.230.68.40] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Re: Some assistance Please! Date: Sun, 21 Feb 2010 22:42:37 -0500 Message-ID: <48981F50DB194215AF5646C9D179883D@Desktop> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0003_01CAB347.2B7B47F0" X-Mailer: Microsoft Office Outlook 11 Thread-Index: AcqzXU5FGmNJvzWZQYqx9ArgHv+ITwAEa9FA X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 This is a multi-part message in MIME format. ------=_NextPart_000_0003_01CAB347.2B7B47F0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Rino, I didn't make any change using mode 3. I only checked the mixture at 22" and it was pretty well at the proper place without making any changes. That makes sense with the yellow injectors because at 22" all four are running and they put out close to the same amount of fuel as do the red/blue combo. Do you know what your mode 2 parameter is set at now? Do you have an EM-3? If so, I think you can read this parameter by holding button 4 and pressing button 1. the dynamic range parameter will be the first number on line 2. I would appreciate knowing what you have it set at. Just to clarify. When you say "too far off the zero point" you mean on a range of -127 to +127 you are close to zero, in the center of that range?? Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Rino Sent: Sunday, February 21, 2010 8:20 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Some assistance Please! Bill, I will give you my understanding of setting the fuel mixture I did a couple of weeks ago. I reinstalled the Renesis after overhaul and the EC3 made a trip to tracy's shop where he replaced one chip. I also changed my injectors, now I have 4 yellow injectors, two primary and two secondaries. I adjusted with mode 3 as you did, probably not as much. Then I adjusted mode 2,I turned the program knob clockwise, then I pressed the program store switch about 10 times because the mixture was too rich below staging point, I wanted to get a leaner mixture below the staging point. That gave me a descent situation where the auto mixture adjust (mode 9) would not go too far off the zero point. I think one has to spread the mixture difference between below and above the staging. First I changed the staging point to between 15 and 16 inches manifold. The factory staging point is set at 19 inches. This does not work for me because 19 inches of manifold pressure is at about the rpm I use when I come in for a landing. I do not like the engine to hesitate when I am getting ready to land, I got other more important things to do at that time. I used the auto adjust quite a bit around the staging point before it got to be acceptable. After using auto adjust, there is a step in the map table between positions 44 and position 45, that is where staging occur in my case. I still can tell when staging occurs but I now find it quite acceptable. Rino Lacombe ----- Original Message ----- From: Bill Bradburry To: Rotary motors in aircraft Sent: Sunday, February 21, 2010 8:33 PM Subject: [FlyRotary] Some assistance Please! First, some news.. I recently redesigned my cooling system due to unable to run the engine for more than about 20 min at high idle without it overheating. Now I have the good problem. Granted it was cold..low 60s. But I was not able to get my oil above about 145 and the water above 185! I ran it full bore till I got tired of holding the brakes! I still need to do some work balancing the air between the oil and water. And I didn't have the cowl on, so the problem is not completely solved, but I am on the right track! Now the question. I have the Renesis that has the very small red primaries and the very large blue secondaries. I recently changed them to all yellow. This removes the need to balance the flow so much when it stages. The total output is very similar between the two systems. Now I have a larger flow when on the primaries and the secondaries kick in with a smaller change. I removed the large secondary option using mode 6. So I checked the mixture at 22 inches manifold pressure and it seemed fine with mixture at center setting so I deemed that I didn't need to change the fuel flow with mode 3. BUT when I started to let it auto tune, I noticed that it was setting all the bins to -127 until after it staged, then it started to build the graph that you normally see. It stages at 20 inches manifold pressure. Is that the recommended pressure? I expected 15"?? So my question is.Should I set the mode 3 at a lower setting? This will affect the entire range so I am concerned that I will not have enough fuel at WOT if I do that. Should I make an adjustment using Mode 2? I don't really understand what dynamic range is?? What are your thoughts? Thanks, Bill B ------=_NextPart_000_0003_01CAB347.2B7B47F0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Rino,

 

I didn’t make any change using mode 3.  I only = checked the mixture at 22” and it was pretty well at the proper place without = making any changes.  That makes sense with the yellow injectors because at = 22” all four are running and they put out close to the same amount of fuel = as do the red/blue combo.

Do you know what your mode 2 parameter is set at now?  Do = you have an EM-3?  If so, I think you can read this parameter by holding = button 4 and pressing button 1.  the dynamic range parameter will be the = first number on line 2.  I would appreciate knowing what you have it set = at.

Just to clarify.  When you say “too far off the zero = point”  you mean on a range of -127 to +127 you are close to zero, in the center = of that range??

 

Bill B 

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Rino
Sent: Sunday, February = 21, 2010 8:20 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = Some assistance Please!

Bill,

 

I will give you my understanding of setting the fuel = mixture I did a couple of weeks ago.  I reinstalled the Renesis after = overhaul and the EC3 made a trip to tracy's shop where he replaced one chip.  I also changed my injectors, now = I have 4 yellow injectors, two primary and two = secondaries.

 

I adjusted with mode 3 as you did, probably not as = much.

Then I adjusted mode 2,I turned the program knob = clockwise, then I pressed the program store switch about 10 times because the = mixture was too rich below staging point, I wanted to get a leaner mixture below = the staging point.   That gave me a descent situation where the = auto mixture adjust (mode 9) would not go too far off the zero = point.   I think one has to spread the mixture difference between below and above = the staging.

 

First I changed the staging point to between 15 and = 16 inches manifold.  The factory staging point is set at 19 = inches.  This does not work for me because 19 inches of manifold pressure is at = about the rpm I use when I come in for a landing.  I do not like the = engine to hesitate when I am getting ready to land, I got other more important = things to do at that time.

 

I used the auto adjust quite a bit around the staging = point before it got to be acceptable.

After using auto adjust, there is a step in the map = table between positions 44 and position 45, that is where staging occur in my case.  I still can tell when staging occurs but I now find it quite acceptable.

 

Rino Lacombe

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

Sent: Sunday, = February 21, 2010 8:33 PM

Subject: = [FlyRotary] Some assistance Please!

 

 First, some news..

I recently redesigned my cooling system due to unable to run the = engine for more than about 20 min at high idle without it overheating.  = Now I have the good problem.  Granted it was cold..low 60s.  But I = was not able to get my oil above about 145 and the water above 185!   = I ran it full bore till I got tired of holding the brakes!  I still need = to do some work balancing the air between the oil and water.  And I = didn’t have the cowl on, so the problem is not completely solved, but I am on = the right track!

 

Now the question.

I have the Renesis that has the very small red primaries and the = very large blue secondaries.  I recently changed them to all = yellow.  This removes the need to balance the flow so much when it stages.  The = total output is very similar between the two systems.  Now I have a = larger flow when on the primaries and the secondaries kick in with a smaller = change.  I removed the large secondary option using mode = 6.

So I checked the mixture at 22 inches manifold pressure and it = seemed fine with mixture at center setting so I deemed that I didn’t need = to change the fuel flow with mode 3.  BUT when I started to let it = auto tune, I noticed that it was setting all the bins to -127 until after it = staged, then it started to build the graph that you normally see.  It stages at = 20 inches manifold pressure.  Is that the recommended pressure?  = I expected 15”??

So my question is…Should I set the mode 3 at a lower setting?  This will affect the entire range so I am concerned that = I will not have enough fuel at WOT if I do that.  Should I make an = adjustment using Mode 2?  I don’t really understand what dynamic range = is??   What are your thoughts?

 

Thanks,

Bill B

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